Date: Friday 8 March 2024
| Time: 16:30 hrs
| Place: Mayantigo building, 6th floor meeting room
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Title:Charting Cosmic Collisions: Gravitational Waves and their Electromagnetic Counterparts |
Presenter, Affiliation: Benjamin Godson, ING
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Abstract:
The advent of gravitational wave (GW) multi-messenger astronomy, brought about by the first electromagnetic (EM) counterpart to a binary neutron star (BNS) merger, has proven transformative for our understanding of the Universe. The combination of GW and EM information of this first event, the kilonova associated with GW170817, was uniquely able to deliver transformative science such as spectroscopic identification of r-process nucleosynthesis, joint constraints on the neutron star equation of state, a standard siren measurement of the Hubble Constant, and confirmation of the progenitors of short-duration gamma ray bursts.
Promptly identifying and locating these electromagnetic counterparts remains a difficult task. This talk will introduce the Gravitational-wave Optical Transient Observer (GOTO), a network of robotic telescopes (with one node here on La Palma!) designed to bridge the gap between gravitational wave detectors and conventional optical telescopes.
Date: Friday 23 February 2024
| Time: 16:00 hrs
| Place: Mayantigo building, 6th floor meeting room
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Title: Atmospheric turbulence monitoring using a robust non-tracking Differential Image Motion Monitor (DIMM)
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Presenter, Affiliation: Jaya Chand, ING
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Abstract:
The Differential Image Motion Monitor (DIMM) is the standard instrument used for evaluating the seeing conditions at astronomical observing sites. Previous work has investigated motorising the DIMM to optimise for target selection, but the robotic setup presents a limiting factor and is not always desirable, for example, to support numerous remote optical ground station operation. With this in mind, an untracked, fixed-pointing DIMM has been developed with a user-friendly interface in mind. This aims to enable a network of low-cost robust instruments without needing protective domes to support applications such as astronomical observations or laser communications. The methodology is simulated and developed using Python and then tested with real data taken from observations in Durham, United Kingdom and La Palma, Canary Islands.
Date: Friday 26 January 2024
| Time: 16:00 hrs
| Place: Mayantigo building, 6th floor meeting room
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Title: Variety of high amplitude flares from the centers of galaxies
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Presenter, Affiliation: Nada Ihanec, ING
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Abstract:
In recent years, time-domain astronomy has become an important branch of observational astronomy, with the discoveries of new types of events, challenging our view on the Universe. In particular, large scale long-term photometric surveys (such as Gaia, OGLE, ZTF, ATLAS, ASAS-SN...) reported many high amplitude optical/UV flares from the centers of both quiescent and active galaxies. In the later ones, luminosity of the flares has far exceeded what has been known about optical photometric variability of active galaxies. A variety of the mechanisms have been proposed to explain such events, from Tidal Disruption Events, Bowen Fluorescence Flares, Changing Look Quasars or Microlensing Events... However most of them still remain a mystery up to date and only continuous search and monitoring of the events will help us shed a light into mechanism driving the flares. The goal of observing and studying this events is to understand what drives the mechanisms behind those flares and deriving the properties of the Supermassive Black Holes in the centers of the host galaxies as well as the properties of the host galaxies themselves. In my talk I will present some examples of high amplitude flares, some of them still ongoing after few years, from the very nucleus of either active or quiescent galaxies, showing their multi-wavelength photometric observations and spectroscopic evolution.
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Journal Clubs in 2023
Date: Friday 17 November 2023
| Time: 16:00 hrs
| Place: Mayantigo building, 6th floor meeting room
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Title: Introduction to radar astronomy
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Presenter, Affiliation: Mikael Turkki, NOT
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Abstract: Radar is an invention that has been used in many applications since the 1900s. The simple idea of a transmitted signal and its backscattering from a solid object is important in many fields, such as traffic, medicine, military, and science. In the presentation, we will take a peek at radar astronomy and its targets. Both instruments and a couple of specific targets are discussed in the presentation, that will hopefully echo interest and intriguing discussion.
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Date: Wednesday 25 October 2023
| Time: 16:00 hrs
| Place: Mayantigo building, 6th floor meeting room
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Title: Españita 101
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Presenter, Affiliation: Alejandro Bermudo
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Abstract: A "brief" summary to understand the country, its people, and its culture. I hope that by the end we all understand why La Palma has a party every day
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Date: Friday 6 October 2023
| Time: 16:00 hrs
| Place: Mayantigo building, 6th floor meeting room
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Title: Lightning in a Bottle
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Presenter, Affiliation: Benjamin Hauptmann, NOT
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Abstract: Despite being known and feared for all of human history, the phenomenon of lightning is not well understood. In particular, the mechanism of cloud electrification eludes us.
The few measurements taken of thunderstorm E-fields have thus far been very limited in scope. In this presentation, I detail the development, construction and testing of a new, drone-based system to further these measurements. By gliding on columns of laminar updraft, our fixed-wing aircraft should be able to probe the deadliest regions of a thunderstorm, completely autonomously. This work culminated in a high-altitude test flight which almost ended successfully.
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Date: Friday 18 August 2023
| Time: 16:00 hrs
| Place: Mayantigo building, 6th floor meeting room
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Title: Astronomy and Sustainability
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Presenter, Affiliation: Alejandra DÃaz, NOT
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Abstract: As human civilization continues advancing, the concept of sustainability—the harmony between economic development, social equity, and the environment—is becoming more and more crucial. In 2015 the United Nations General Assembly set 17 Sustainable Development Goals with the aim to create a sustainable future for humanity by 2030. How can astronomy help meet these goals? The answer may surprise you!
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Date: Friday 14 July 2023
| Time: 16:00 hrs
| Place: Mayantigo building, 6th floor meeting room
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Title: Interacting Supernovae and when to find them
Subtitle: Searching for late-time CSM interactions in SNe Ia in ZTF
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Presenter, Affiliation: Jacco Terwel, ING
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Abstract: Type Ia supernovae (SNe Ia) are among the brightest events in the universe, but despite decades worth of research the way they explode is still not exactly known. This is known as the progenitor problem. One piece that might help to solve this puzzle is the subclass of SN Ia-CSM: a supernova that interacts with circumstellar material. In this talk, I will give an overview of how to find these elusive objects, and what they can teach us about their past.
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Date: Friday 7 July 2023
| Time: 16:00 hrs
| Place: Mayantigo building, 6th floor meeting room
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Title: Clusters' far-reaching influence on narrow angle tail radio galaxies
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Presenter, Affiliation: Kellie de Vos, ING
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Abstract: Galaxy clusters are the largest gravitationally bound objects in the universe, and are largely responsible for the environmental impacts of galaxy evolution. In this talk, I will discuss how these environmental effects can deform radio galaxies in such a way that we can determine their orbit around a galaxy cluster on the plane of the sky. Furthermore, I will present some unexpected results that indicate that there is more of an environmental impact on galaxy evolution in the outskirts of galaxy clusters than we previously thought, suggesting that these regions need more investigation.
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Date: Friday 30 June 2023
| Time: 16:00 hrs
| Place: Mayantigo building, 6th floor meeting room
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Title: Determining stellar properties using BASTA
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Presenter, Affiliation: Mark Lykke Winther, Aarhus University
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Abstract: As the quality of observations increases over the years, so too must the stellar pipelines in order to take advantage of these. This requires both accurate stellar models, and a fitting algorithm capable of correctly matching observations to models. In this talk, I will focus on the latter, by giving an introduction to the BAyesian STellar Algorithm (BASTA). It is a versatile pipeline for determining stellar properties, by fitting a multitude of different types of observations to a grid of stellar models or isochrones, to precisely infer parameters such as mass and age. Apart from a general overview of the code, I will also summarise my most recent publication, where I’ve used the pipeline to determine the history of the convective core of the star Kepler-444.
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Date: Friday 16 June 2023
| Time: 16:00 hrs
| Place: Mayantigo building, 6th floor meeting room
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Title: Hippos, the real stars
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Presenter, Affiliation: Kiran Jhass, ING
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Abstract: Hippos, like the subjects of many of your research, are dense balls of matter which vary in size, mass and colour. In this talk I will investigate the interactions, behaviours and characteristics which make them so fascinating and unique.
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Date: Friday 02 June 2023
| Time: 16:00 hrs
| Place: Mayantigo building, 6th floor meeting room
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Title: Observational study on two type IIb supernova
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Presenter, Affiliation: Niilo Koivisto, NOT
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Abstract: I will present master’s thesis where I performed photometric and spectroscopic analysis on two type IIb supernovae, 2017gkk and 2019gaf. The observations were obtained using the Nordic Optical Telescope (NOT) and they cover epochs from early days to about a year after the explosion. The motivation for this long time series of spectra and light curves was to better understand the physics of core-collapse supernovae and especially transitional type IIb SNe. I will also give short summary on observations and significance of this new beautiful supernova 2023ixf which so nearby (~7 Mpc) that we can almost touch it!
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Date: Friday 19 May 2023
| Time: 16:00 hrs
| Place: Mayantigo building, 6th floor meeting room
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Title: Building the local Milky Way halo – Investigating the origin of the local Milky Way stellar halo using Blue Straggler stars
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Presenter, Affiliation: Julie Thiim Gadeberg, NOT
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Abstract: Our current, leading theory describing the history of the Universe is the ΛCDM model. The model predicts that larger structures are formed through hierarchical clustering, and, thus, merger events are vital to the formation and evolution of larger galaxies such as the Milky Way. The remnants of such accretion events will be scattered throughout the Galaxy, building the Galactic halo that we can observe today.
In this Journal Club I will explain how the peculiar blue straggler stars in the local stellar halo can help support this hypothesis by presenting the work I did during my master's thesis. Due to the origin story of these stragglers their number will differ depending on the mass and type of the astronomical object in which they are born, making them ideal for our purpose. It takes nothing more than a simple population count, and with the dawn of the Gaia spacecraft counting has never been easier.
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Date: Friday 21 April 2023
| Time: 16:00 hrs
| Place: Mayantigo building, 6th floor meeting room
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Title: WEAVE: instrumental and science opportunities for ING students
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Presenter, Affiliation: Marc Balcells, ING
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Abstract: In the coming decade WEAVE will be a key instrument for European astronomy. We will introduce the instrument characteristics and capabilities, with an emphasis on recent results from commissioning. We will then go over the eight WEAVE surveys and the teams that lead them, and will emphasize the opportunities for access throught the surveys and through open time.
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Date: Friday 24 March 2023
| Time: 16:00 hrs
| Place: Mayantigo building, 6th floor meeting room
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Title: Sky is the limit - Measuring the airglow continuum
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Presenter, Affiliation: Joonas Uljas, University of Copenhagen
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Abstract: With the dawn of 40-meter class era, the main noise sources in astronomical observation are moving away from detectors and are becoming solely dominated by the sky. The line emission component of the night time atmosphere is quite well known, but the existence and characteristics of its continuum component is still debated in the literature. Airglow continuum is challenging to measure due to its faintness, and the fact that the diffraction gratings, the main dispersive elements in astronomical spectrographs, are prone to produce scattered light. In presence large amount of bright emission lines, such as the hydroxyl lines in the near infrared, this scattered light can seem as continuum. A new type of echelle spectrograph has been purpose designed and built for measuring the airglow continuum. I will discuss the first impression of the project.
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Date: Friday 10 March 2023
| Time: 16:00 hrs
| Place: Mayantigo building, 6th floor meeting room
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Title: A walk through fresh AstroNews
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Presenter, Affiliation: James Munday & Judith Santos, ING
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News link(s): |
Date: Friday 24 February 2023
| Time: 16:00 hrs
| Place: Mayantigo building, 6th floor meeting room
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Title: Common envelope evolution: From binary star chrysalis to cosmic butterfly
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Presenter, Affiliation: David Jones, IAC
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| Abstract: Planetary nebulae are some of the most strikingly beautiful astrophysical phenomena known, gracing many a glossy-paged, coffee-table book and earning them the nickname "cosmic butterflies". While classical stellar evolutionary theory states that planetary nebulae are the end products of intermediate mass stars, forming as the star leaves the Asymptotic Giant Branch and evolves towards the white dwarf phase, it is now clear that a significant fraction of planetary nebulae originate from a binary evolutionary pathway. As the immediate products of the common envelope, close-binary central stars of planetary nebulae offer a unique tool with which to study this rather poorly understood phase of binary evolution. Furthermore, as the nebula itself represents the ionised remnant of the ejected common-envelope, such planetary nebulae can be used to directly probe the mass, morphology and dynamics of the ejecta. Here, I will summarise our current understanding of the importance of binarity in the formation of planetary nebulae as well as what they can tell us about the common envelope phase - including the possible relationships with other post-common-envelope phenomena like novae and type Ia supernovae.
News link(s): |
Date: Friday 10 February 2023
| Time: 16:00 hrs
| Place: Mayantigo building, 6th floor meeting room
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Title: Dwarves and giants as guardians of the galaxy
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Presenter, Affiliation: Jeppe Thomsen, NOT
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| Abstract: For eras untold, the fire giants have kept the secrets of the galactic out of our grasp through trickery and subterfuge. But as they pair up with friend or foe, the eclipse will reveal the path ahead.
News link(s): |
Journal Clubs in 2022
Date: Friday 07 December 2022
| Time: 17:00 hrs
| Place: Mayantigo building, 6th floor meeting room
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Title: Binary Star systems
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Presenter, Affiliation: James Munday, ING
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News link(s): MNRAS |
Date: Friday 02 December 2022
| Time: 17:00 hrs
| Place: Mayantigo building, 6th floor meeting room
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Date: Friday 20 May 2022
| Time: 16:00 hrs
| Place: online
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Title: Modelling Post-Common Envelope Binaries
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Presenter, Affiliation: George Hume, ING
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Paper link(s): RNAAS |
News link(s): |
Date: Friday 13 May 2022
| Time: 15:00 hrs
| Place: online
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Date: Friday 29 April 2022
| Time: 16:00 hrs
| Place: online
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Date: Friday 22 April 2022
| Time: 16:00 hrs
| Place: online
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Date: Friday 08 April 2022
| Time: 16:00 hrs
| Place: online
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Date: Friday 04 February 2022
| Time: 16:00 hrs
| Place: online
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Past Student Seminars:
Journal Clubs in 2021
Date: Friday 10 December 2021
| Time: 16:00 hrs
| Place: online
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Date: Friday 3 December 2021
| Time: 16:00 hrs
| Place: online
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Title: On the fragility of thin-discs in early-type galaxies
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Presenter, Affiliation: Pablo Galan, ING
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Date: Friday 26 November 2021
| Time: 14:00 hrs
| Place: online
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Date: Friday 21 May 2021
| Time: 19:00 hrs
| Place: online
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Date: Friday 14 May 2021
| Time: 16:00 hrs
| Place: online
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Title:Analysing the chemical abundance space of the Galactic disc with machine-learning methods
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Presenter, Affiliation: Ignacio Garcia, ING
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Date: Friday 7 May 2021
| Time: 16:00 hrs
| Place: online
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Title:Effect of satellite constellations on observational astronomy
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Presenter, Affiliation: Nada Ihanec, ING
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Date: Friday 23 April 2021
| Time: 17:30 hrs
| Place: online
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Title: Detection of large-scale X-ray bubbles in the Milky Way halo
Paper Authors: P. Predehl et. al.
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Presenter, Affiliation: Akke Viitanen, NOT
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Paper link(s): nature |
News link(s): Article 1 (AI) |
Date: Friday 12 February 2021
| Time: 16:00 hrs
| Place: online
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Date: Friday 4 February 2021
| Time: 16:00 hrs
| Place: online
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Date: Friday 21 January 2021
| Time: 16:00 hrs
| Place: online
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Title:Asteroid and meteorite compositional studies by modeling light scattering
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Presenter, Affiliation: Julia Martikainen, NOT
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Journal Clubs in 2020
Date: Wednesday 02 December 2020
| Time: 18:00 hrs
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Title:
Close binary stars and their evolution towards planetary nebulae
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Presenter, Affiliation: James Munday, IAC
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Date: Thursday 23 July 2020
| Time: 16:00 hrs
| Place: online
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Date: Friday 17 July 2020
| Time: 16:00 hrs
| Place: online
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Titles:
Cell invasion studies using Two Photon Polimerization technique; Extragalactic Background light from the HST CANDLES survey; Stellar continuum fitting of UV spectra
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Presenter, Affiliation: Alberto Saldana, UNIGE
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Paper link(s): RSEF |
Date: Friday 26 June 2020
| Time: 16:00 hrs
| Place: onilne
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Date: Friday 5 June 2020
| Time: 16:00 hrs
| Place: Casa Tey
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Title:
Discussions: exo-comets and exo-moons
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Date: Friday 29 May 2020
| Time: 16:00 hrs
| Place: online
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Date: Friday 22 May 2020
| Time: 16:00 hrs
| Place: online
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Date: Friday 15 May 2020
| Time: 16:00 hrs
| Place: online
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Title:
Spatial Density and Model of Meteoroid Population.
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Presenter, Affiliation: Martin Balaz, GTC
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Title:
THELI v3.
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Presenter, Affiliation: Viktoria Pinter, ING
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News link(s): Article 1 (Supernovae) |
Date: Friday 8 May 2020
| Time: 16:00 hrs
| Place: online
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Date: Friday 24 April 2020
| Time: 16:00 hrs
| Place: online
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Date: Friday 17 April 2020
| Time: 16:00 hrs
| Place: online
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Title:Mechanical Engineering for Scientific Infrastructures
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Presenter, Affiliation: Carlo Zanoni (Mechanical Engineer at ESO)
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Title: WHT laser beacon
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Presenter, Affiliation: Pinter Viktoria, ING
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Paper link(s): Article 1., Article 2., Article 3., Article 4., |
Date: Friday 10 April 2020
| Time: 16:00 hrs
| Place: online
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Title: Starling satellites and their effect on ground based observations
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Presenter, Affiliation: Jacob Hibbert, ING
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News link(s): BepiColombo, Borisov a., Borisov b. |
Date: Friday 3 April 2020
| Time: 16:00 hrs
| Place: online
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Title: A pulsating white dwarf in an eclipsing binary
Paper Authors: Steven G. Parsons, et. al.
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Presenter, Affiliation: James Munday, GTC
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Paper link(s): nature, IAC |
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Title: Discovery of a giant radio fossil in the ophiuchus galaxy cluster
Paper Authors: S. Giacintucci, et. al.
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Presenter, Affiliation: Tom Steinmetz, ING
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Paper link(s): arXiv |
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Title: High accuracy on H0 constraints from gravitational wave lensing events
Paper Authors: P. Cremonese and V. Salzano
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Presenter, Affiliation: Macarena Garcia, ING
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Paper link(s): arXiv |
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Date: Friday 27 March 2020
| Time: 16:00 hrs
| Place: online
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Title: Tunable/ interference photometric filters
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Presenter, Affiliation: Joonas Viuho, NOT
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Date: Friday 20 March 2020
| Time: 16:00 hrs
| Place: online
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Title:
Tidally trapped pulsations in a close binary star system discovered by TESS
Paper Authors: G. Handler, et. al.
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Presenter, Affiliation: David Jones (IAC)
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Paper link(s): nature , IAC |
Date: Friday 6 March 2020
| Time: 16:00 hrs
| Place: Mayantigo building 6th floor meeting room
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Date: Friday 28 February 2020
| Time: 16:00 hrs
| Place: Mayantigo building 6th floor meeting room
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Date: Friday 14 February 2020
| Time: 16:00 hrs
| Place: Mayantigo building 6th floor meeting room
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Title: Secularly powered outflows from AGN: the dominance of
non-merger driven supermassive black hole growth
Paper Authors: R. J. Smethurst, et. al.
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Presenter, Affiliation: Macarena Garcia, ING
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Paper link(s): arXiv |
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Title:
ALMA catches beautiful outcome of stellar fight
Paper Authors: H. Olofsson, et. al.
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Presenter, Affiliation: David Jones, IAC
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Paper link(s): ESO |
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Date: Friday 7 February 2020
| Time: 16:00 hrs
| Place: Mayantigo building 6th floor meeting room
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Title: A Galactic-scale gas wave in the solar neighbourhood
News
Paper Authors: João Alves, et. al.
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Presenter, Affiliation: Tereza Jerabkova, GTC
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Paper link(s): nature, Radcliffe institute news |
Presenter, Affiliation: Jacob Hibbert, ING
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Software Description: phoebe
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Date: Friday 31 January 2020
| Time: 16:00 hrs
| Place: Mayantigo building 6th floor meeting room
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Title: A limit on Planck-scale froth with ESPRESSO
News
Paper Authors: Cooke, Ryan; Welsh, Louise; Fumagalli, Michele; Pettini, Max
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Presenter, Affiliation: Jacob Hibbert, ING
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Paper link(s): arXiv |
News link(s): Article 1 , Article 2a , Article 2b , Article 3 , Article 4 |
Date: Friday 24 January 2020
| Time: 16:00 hrs
| Place: Mayantigo building 6th floor meeting room
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Title:
A wide star-black-hole binary system from radial-velocity measurements
Paper Authors: Jifeng Liu, Haotong Zhang, Xiangqun Cui, et. al.
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Presenter, Affiliation: Tereza Jerabkova, GTC
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Paper link(s): nature |
Related papers: Paper 1 , Paper 2 , Paper 3 , Paper 4 , Paper 5 , Paper 6 |
Journal Clubs in 2019
Date: Friday 29 November 2019
| Time: 16:00 hrs
| Place: Mayantigo building 6th floor meeting room
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Date: Friday 22 November 2019
| Time: 16:00 hrs
| Place: Mayantigo building 6th floor meeting room
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Date: Friday 15 November 2019
| Time: 16:00 hrs
| Place: Mayantigo building 6th floor meeting room
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Title:
A BlueSONG; Tracing magnetic activity in the Ca II H & K lines of solar-type star using eShel, a commercial spectrograph mounted on the Hertzsprung SONG telescope
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Presenter, Affiliation: Nicholas Emborg Jannsen, NOT
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News link(s): Article 1, Article 2 |
Date: Friday 8 November 2019
| Time: 15:30 hrs
| Place: Mayantigo building 6th floor meeting room
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Date: Wednesday 23 October 2019
| Time: 09:30 hrs
| Place: Mayantigo building 6th floor meeting room
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Title:
CCDs
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Presenter, Affiliation: Joonas Viuho, NOT
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Date: Friday 18 October 2019
| Time: 09:30 hrs
| Place: Mayantigo building 6th floor meeting room
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Title:
Proving the outstanding capabilities of ImagingAtmospheric Cherenkov Telescopes in high timeresolution optical astronomy
Paper Authors: T. Hassan, M. K. Daniel, for the VERITAS Collaboration (DESY Germany, CfA Arizona, USA)
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Presenter, Affiliation: Maria de la Macarena Garcia, ING
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Paper link: arXiv |
Date: Friday 11 October 2019
| Time: 09:30 hrs
| Place: Mayantigo building 6th floor meeting room
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Contact:
Last modified: 15 April 2024
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