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UID:69dea6348bc20
DTSTAMP:20260414T164020
DTSTART:20150416T113000
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URL:https://murmitoyen.com/events/vanille/udem/detail/599750-the-outer-arch
 itecture-of-planetary-systems
LOCATION:Université de Montréal - Pavillon Roger-Gaudry\, 2900\, chemin d
 e la Tour\, Montréal\, QC\, Canada\, H3T 1J6
SUMMARY:The Outer Architecture of Planetary Systems
DESCRIPTION:Brendan Bowler\, CaltechHigh-contrast adaptive optics imaging a
 nd spectroscopy are powerful tools to probe the outer architecture of plan
 etary systems and directly study the atmospheres of extrasolar planets.  O
 ver the past few years direct imaging has uncovered a growing number of pl
 anetary-mass companions spanning over two orders of magnitude in separatio
 n (10–1000 AU).  The origin of these companions is unclear\; they might 
 represent the tail end of binary star formation\, planets formed in situ\,
  and/or the dynamical ejection of close-in planets as a result of planet-p
 lanet scattering events.  I will discuss our recent efforts to characteriz
 e new planetary-mass companions and what we have learned from them at the 
 individual and population levels.  I will also describe discoveries and ne
 w statistical results from the Planets Around Low-Mass Stars (PALMS) high-
 contrast AO imaging survey carried out primarily at Keck Observatory.  Wit
 h a sample size of over 350 young M dwarfs already observed in our ongoing
  extended survey\, PALMS is the largest direct imaging planet search in th
 is stellar mass regime.  Altogether\, complementary planet-finding techniq
 ues sensitive to a broad range of separations are beginning to map the com
 plete architecture of giant planets around the most common stars in our ga
 laxy.Présentée par le Groupe Astronomie et astrophysique du Département
  de physique de l'Université de Montréal. Cette conférence est destin
 ée à des spécialistes dans le domaine de l'astrophysique et sera donné
 e en anglais.
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