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Institute of Astronomy, KU Leuven (Belgium)
Belgium
เข้าร่วมเมื่อ 22 ก.ย. 2017
The Institute of Astronomy of KU Leuven is part of the Department of Physics and Astronomy of KU Leuven. The activities of the Institute of Astronomy are related to the study of stellar astrophysics and stellar evolution in a broad context, and is an expert in the fields of Stellar Variablity & Asteroseismology, Late phases of Stellar Evolution, Binary & Massive Stars, Exoplanets, and Astronomical Instrumentation. The Institute of Astronomy is also responsible for two master programmes: The 2-year Master Astronomy & Astrophysics and the 1-year Advanced Master of Space Studies at KU Leuven
IvS Seminar: Linus Heinke (12/12/2024)
Linus Heinke - "Atmospheric Characterization of Exoplanets: Transmission Spectroscopy of a warm sub-Saturn Across the Entire Accessible JWST Wavelength Range" (IvS seminar 12/12/2024)
Abstract: The launch of the James Webb Space Telescope (JWST) has started a new era in the study of exoplanetary atmospheres. Transmission spectroscopy is perhaps the most important of the indirect techniques used to characterize the atmosphere of planets, for which we cannot separate stellar and planetary emission. Transit spectra allow us to constrain the atmospheric structure at the terminator region, which includes molecular abundances and temperature. Getting to these constraints is non-trivial, however. First there is the challenge of data reduction, turning the timeseries of uncorrected JWST images into transit spectra, and then the challenge of fitting these spectra using atmospheric retrievals. In this seminar, I will first present an overview on this topic, highlighting some important science results obtained with JWST. Then I will shift to a case study of the warm sub-Saturn HAT-P-12b for which JWST transmission spectroscopy was obtained using JWST NIRISS SOSS, NIRSpec BOTS, and MIRI LRS, covering the entire accessible wavelength range.
Abstract: The launch of the James Webb Space Telescope (JWST) has started a new era in the study of exoplanetary atmospheres. Transmission spectroscopy is perhaps the most important of the indirect techniques used to characterize the atmosphere of planets, for which we cannot separate stellar and planetary emission. Transit spectra allow us to constrain the atmospheric structure at the terminator region, which includes molecular abundances and temperature. Getting to these constraints is non-trivial, however. First there is the challenge of data reduction, turning the timeseries of uncorrected JWST images into transit spectra, and then the challenge of fitting these spectra using atmospheric retrievals. In this seminar, I will first present an overview on this topic, highlighting some important science results obtained with JWST. Then I will shift to a case study of the warm sub-Saturn HAT-P-12b for which JWST transmission spectroscopy was obtained using JWST NIRISS SOSS, NIRSpec BOTS, and MIRI LRS, covering the entire accessible wavelength range.
มุมมอง: 41
วีดีโอ
IvS Seminar: Tahina Princy Ranaivomanana (05/12/2024)
มุมมอง 71หลายเดือนก่อน
Tahina Princy Ranaivomanana - "Characterising the population of hot sub-luminous stars: Multi-colour photometry and machine learning approaches" (IvS seminar 05/12/2024)
Webinar - Launch your career with ESA!
มุมมอง 56หลายเดือนก่อน
On Wednesday 27/11 the Career Center of the European Space Agency (ESA) gave a special webinar for KU Leuven students. ESA is looking for graduates with different profiles, looking for applicants with backgrounds in (astro-)physics, engineering, remote sensing, earth science, climate & space weather, biosciences, chemistry, data analysis & software development, science communication, and many o...
IvS Seminar: Pablo Huijse (28/11/2024)
มุมมอง 80หลายเดือนก่อน
Pablo Huijse - "Deep Learning in Observational Astronomy: Theory and Applications" (IvS seminar 28/11/2024) Abstract: Artificial neural networks (ANNs), machine learning models inspired by the brain and proposed over four decades ago, have recently achieved widespread prominence by addressing complex pattern recognition challenges across various disciplines. This resurgence has been fueled not ...
IvS Seminar: Yannis Argyriou (21/11/2024)
มุมมอง 127หลายเดือนก่อน
Yannis Argyriou - "Instrumentation as science: Calibration of the JWST, ARIEL, and ELT/METIS instruments" (IvS seminar 21/11/2024) Abstract: For three years already, the James Webb Space Telescope has been sending back to Earth images and spectra of immense beauty and quantity of scientific information in the infrared. As we look ahead to more space-breaking discoveries, we also lay the ground-...
IvS Seminar: Camille Landri (14/11/2024)
มุมมอง 77หลายเดือนก่อน
Camille Landri - "Exploring the evolution of massive stars in binaries with 3D simulations" (IvS seminar 14/11/2024) Abstract: Massive stars are commonly found in binary systems with such low separations that the stars will eventually interact with each other, through tidal forces, phases of mass transfer or even winds. Binary interactions play a crucial role in shaping the evolution of stellar...
IvS Seminar: Joel Ong (07/11/2024)
มุมมอง 76หลายเดือนก่อน
Joel Ong - "Understanding Mixed Modes (for Fun and for Profit)" (IvS seminar 07/11/2024) Abstract: In evolved stars, standing pressure waves (or `p-modes') in the envelope couple to gravity waves (`g-modes') deep inside their interiors. The resulting gravitoacoustic mixed modes exhibit nonlinear ``avoided crossings'' a ubiquitous phenomenon in the general physics of many-body dynamical systems ...
IvS Seminar: Manuel Scherf (17/10/2024)
มุมมอง 762 หลายเดือนก่อน
Manuel Scherf - "The evolution and prevalence of Earth-like Habitats in the Galaxy" (IvS seminar 17/11/2024) Abstract: The existence of Earth-like Habitats, i.e., temperate rocky exoplanets hosting Earth-like N2-O2-dominated atmospheres with minor amounts of CO2, depends on certain astrophysical, geophysical, and, potentially, biochemical criteria that must be met to allow for their evolution a...
IvS Seminar: David Dickson (10/10/2024)
มุมมอง 1242 หลายเดือนก่อน
David Dickson - "Quantifying Roche Lobe Overflow in the Formation of Merging Black Hole Binaries" (IvS seminar 10/10/2024) Abstract: Gravitational wave astronomy has provided a new horizon to observational research, one predominated by binary black hole mergers. These dynamical events are thought to arise from close stellar binaries that eject much of their angular momentum through a phase of R...
IvS Seminar: Rhys Seeburger (03/10/2024)
มุมมอง 953 หลายเดือนก่อน
Rhys Seeburger - "A detailed analysis of a sample of black hole impostoring post-mass-transfer binaries" (IvS seminar 03/10/2024) Abstract: Post-mass-transfer binaries (PMTBs) have recently drawn attention in the context of the search for black hole binaries, and have aquired a reputation as black hole impostors. Most of the initially promising black hole binaries advocated in Gaia DR3 appear t...
IvS Seminar: Dario Fritzewski (26/09/2024)
มุมมอง 723 หลายเดือนก่อน
Dario Fritzewski - "Exploring the population of β Cephei stars with Gaia and TESS" (IvS seminar 26/09/2024) Abstract: Massive main sequence pulsators of the β Cephei (β Cep) type are underrepresented in the ongoing space photometry revolution. However, they play a crucial role in refining evolutionary models of massive stars. The Gaia mission has been a highly successful pathway for discovering...
Overleven - "De Sprekende Ster" (VRT 2005)
มุมมอง 1366 หลายเดือนก่อน
Overleven - "De Sprekende Ster" (VRT 2005)
IvS Seminar 30/05/2024: Nikolay Britavskiy
มุมมอง 837 หลายเดือนก่อน
IvS Seminar 30/05/2024: Nikolay Britavskiy
IvS Seminar: Vincent Vanlaer (23/05/2024)
มุมมอง 1087 หลายเดือนก่อน
IvS Seminar: Vincent Vanlaer (23/05/2024)
IvS Seminar: Olivier Verhamme (16/05/2024)
มุมมอง 817 หลายเดือนก่อน
IvS Seminar: Olivier Verhamme (16/05/2024)
IvS Seminar: Hannah Brinkman (25/04/2024)
มุมมอง 1108 หลายเดือนก่อน
IvS Seminar: Hannah Brinkman (25/04/2024)
IvS Seminar: Shreeya Shetye (04/04/2024)
มุมมอง 1139 หลายเดือนก่อน
IvS Seminar: Shreeya Shetye (04/04/2024)
IvS Seminar: Nuno Pereira (28/03/2024)
มุมมอง 699 หลายเดือนก่อน
IvS Seminar: Nuno Pereira (28/03/2024)
IvS Seminar: Jan van Roestel & Steven Bloemen (21/03/2024)
มุมมอง 1009 หลายเดือนก่อน
IvS Seminar: Jan van Roestel & Steven Bloemen (21/03/2024)
IvS Seminar: Nadya Serebriakova (14/03/2024)
มุมมอง 1259 หลายเดือนก่อน
IvS Seminar: Nadya Serebriakova (14/03/2024)
IvS Seminar: Nicholas Jannsen (07/03/2024)
มุมมอง 1009 หลายเดือนก่อน
IvS Seminar: Nicholas Jannsen (07/03/2024)
IvS Seminar: Fleur Seuren (29/02/2024)
มุมมอง 13910 หลายเดือนก่อน
IvS Seminar: Fleur Seuren (29/02/2024)
IvS Seminar: Jolien Malfait (15/02/2024)
มุมมอง 13010 หลายเดือนก่อน
IvS Seminar: Jolien Malfait (15/02/2024)
IvS Seminar: Luc IJspeert (08/02/2024)
มุมมอง 9910 หลายเดือนก่อน
IvS Seminar: Luc IJspeert (08/02/2024)
IvS Seminar: Soetkin Janssens (01/02/2024)
มุมมอง 20111 หลายเดือนก่อน
IvS Seminar: Soetkin Janssens (01/02/2024)
IvS Seminar: Thomas Ceulemans (25/01/2024)
มุมมอง 6211 หลายเดือนก่อน
IvS Seminar: Thomas Ceulemans (25/01/2024)
IvS Seminar: Rich Townsend (18/01/2024)
มุมมอง 11911 หลายเดือนก่อน
IvS Seminar: Rich Townsend (18/01/2024)
Good job Joel!
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Impressive!
2025 eh, from the future. Such High tech. Much wow
A very nice presentation! Thanks for sharing. Note that a combination unit for making echelle flats by means of a tungsten lamp and several LEDs is readily available in the amateur world from the Shelyak company for their eShel (echelle) spectrograph. It is described in their “Installation and Maintenance Manual” dated August 2011. Free to download.
Comming from vegamovies😅😊
that's awesome man
Congratulations
Excelente! Felicitaciones!!
Very good defense
great presentation, all I could say is thank you because I also learn many things from your slides. Again, congratulations Dr. Emily.
ρяσмσѕм 👍
This was enlightening. So proud of you Dr. Karan!
𝐩яⓞ𝓂𝓞Ş𝐦
Heel goed gedaan Dr. Robin, we zijn allemaal super trots op u!
Merci Lieven :)
What's the vernacular: "chemical-physics or physical-chemistry"?? But very interesting!! Taïssa's ancestors must be very proud!
Great wonderful presentation Karan...keep up your good work
Great works!! I would suggest to add the title of the talks in the video title as well (not just the name of the speaker and dates) 👍
Wasn dass fürn scheiß
Wonderful results and great explanation! is the animation at 2:58 available for educational use?
Thank you very much! Let me contact the creators of the animation and get back to you with more details. Cheers!
Tillykke, May!
Congratulations May!