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X-WR-CALDESC:Évènements pour CRAL
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DTSTART;TZID=Europe/Paris:20241220T110000
DTEND;TZID=Europe/Paris:20241220T120000
DTSTAMP:20260510T115212
CREATED:20241119T102559Z
LAST-MODIFIED:20241218T110443Z
UID:7569-1734692400-1734696000@cral.osu-lyon.fr
SUMMARY:CRAL@Obs seminar by Antoine Rocher (EPFL)
DESCRIPTION:Galaxy-halo connection in cosmology with wide spectroscopic surveys —\n \nSince the early 2000s\, wide spectroscopic surveys\, in particular multi-fibre experiments\, have provided significant insights into the three-dimensional distribution of galaxies and quasars in the Universe\, by constraining cosmological parameters through precise measurements of the baryon acoustic oscillation (BAO) scale and the non-linear growth rate of structure from redshift space distortions. Current and upcoming stage IV spectroscopic surveys\, such as the Dark Energy Spectroscopic Instrument (DESI) or the 4-metre Multi-Object Spectrograph Telescope (4MOST) aims to reach sub-percent precision on cosmological parameters over a broad redshift range of 0.1 < z < 3.5.\nIn this talk\, I will give an overview of the DESI survey and its scientific goals. In particular\, I will focus on the galaxy-halo connection\, i.e. how galaxies are connected to the underlying matter field. I will present results obtained using the early data release of DESI to constrain the connection between DESI galaxies (luminous red galaxies (LRGs) and Emission Line Galaxies (ELGs)) using the halo occupation distribution (HOD) framework\, an empirical approach to link galaxies and dark matter halos in N-body simulations.
URL:https://cral.osu-lyon.fr/event/cralobs-seminar-by-antoine-rocher-epfl/
LOCATION:Observatoire
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DTSTART;TZID=Europe/Paris:20241213T110000
DTEND;TZID=Europe/Paris:20241213T120000
DTSTAMP:20260510T115212
CREATED:20241127T165830Z
LAST-MODIFIED:20241127T165830Z
UID:7608-1734087600-1734091200@cral.osu-lyon.fr
SUMMARY:CRAL@ENS seminar by Ugo Lebreuilly (CEA Saclay)
DESCRIPTION:TBD
URL:https://cral.osu-lyon.fr/event/cralens-seminar-by-ugo-lebreuilly-cea-saclay/
LOCATION:ENS
ATTACH;FMTTYPE=image/png:https://cral.osu-lyon.fr/wp-content/uploads/2023/11/image_defaut.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20241129T110000
DTEND;TZID=Europe/Paris:20241129T120000
DTSTAMP:20260510T115212
CREATED:20241119T101540Z
LAST-MODIFIED:20241119T131158Z
UID:7563-1732878000-1732881600@cral.osu-lyon.fr
SUMMARY:CRAL@Obs seminar by John Chisholm (UT Austin)
DESCRIPTION:JWST’s GLIMPSE: A view of the faintest galaxies in the first billion years of cosmic time —\n \nFaint high-redshift galaxies in the early universe constrain the properties of dark matter\, the early build-up of stellar mass\, and which sources reionized the early universe. The first two years of JWST observations have revealed a wealth of constraints on modestly bright galaxies in the first billion years of cosmic time\, but the faintest population has remained under-probed. JWST’s Glimpse is a Cycle 2 large program that pairs up to 39 hour integrations with the natural lensing of the massive foreground cluster Abell S1063. These observations probe a new regime of intrinsically faint galaxies (down to MUV of -10 or observed magnitudes of 34) in the early universe. With seven wide and two medium bands\, we find a new class of galaxy candidates within the first 200 Myr of cosmic time that must have formed extremely efficiently. We also constrain the number of very faint galaxies in Cosmic Dawn\, the star formation histories of early galaxies\, and explore how the faintest galaxies contributed to reionization. In this talk I will highlight our preliminary effort to reveal the population of the faintest early galaxies and their impact on the evolution of the universe.
URL:https://cral.osu-lyon.fr/event/cralobs-seminar-by-john-chisholm-ut-austin/
LOCATION:Observatoire
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DTSTART;TZID=Europe/Paris:20241109T080000
DTEND;TZID=Europe/Paris:20241111T170000
DTSTAMP:20260510T115212
CREATED:20241007T100815Z
LAST-MODIFIED:20241007T102345Z
UID:6132-1731139200-1731344400@cral.osu-lyon.fr
SUMMARY:Les Conférences\, Association française d'astronomie
DESCRIPTION:Plus de trente conférenciers qui font l’actualité astronomique et spatiale vous convient à un voyage extraordinaire jusqu’aux frontières de la connaissance. Il y est question de cosmologie\, d’espace\, de planétologie\, d’histoire des sciences\, de physique fondamentale\, de biologie… Connus pour leur aisance\, leur propension à nous faire vivre les découvertes\, leur aptitude à expliquer simplement des concepts difficiles… ou tout simplement leur passion\, les orateurs et oratrices des Rencontres sont des scientifiques\, des spécialistes. \n 
URL:https://cral.osu-lyon.fr/event/les-conferences-association-francaise-dastronomie/
ATTACH;FMTTYPE=image/png:https://cral.osu-lyon.fr/wp-content/uploads/2024/10/afa.png
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20241022T153000
DTEND;TZID=Europe/Paris:20241022T170000
DTSTAMP:20260510T115212
CREATED:20241014T074246Z
LAST-MODIFIED:20241014T074422Z
UID:6347-1729611000-1729616400@cral.osu-lyon.fr
SUMMARY:Séminaire de Laurent Mugnier (ONERA) à l'Observatoire
DESCRIPTION:Focal-plane wavefront sensing and applications : from Earth observation to astronomical imaging\, laser focusing and exoplanet detection
URL:https://cral.osu-lyon.fr/event/22-10-2024-330-pm-observatoire/
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