BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Chemical constraints on the formation and migration of hot Jupiter
 s - Nikku Madhusudhan (IoA)
DTSTART:20141105T163000Z
DTEND:20141105T173000Z
UID:TALK55107@talks.cam.ac.uk
CONTACT:Dr B.-O. Demory
DESCRIPTION:The origin of close-in giant exoplanets is a long-standing puz
 zle. Planet formation theories suggest that such planets are unlikely to h
 ave formed in-situ but instead may have formed at large orbital separation
 s beyond the snow line and migrated inward to their present orbits. Two co
 mpeting hypotheses suggest that the planets migrated either through intera
 ction with the protoplanetary disk during their formation\, or by disk-fre
 e mechanisms such as gravitational interactions with a third body. Observa
 tions of eccentricities and spin-orbit misalignments of hot Jupiter system
 s have been unable to differentiate between the two hypotheses. In the pre
 sent talk I will discuss how chemical abundances of exoplanetary atmospher
 es may be used to constrain their formation and migration mechanisms. In p
 articular\, we find that observable chemical depletions in hot Jupiter atm
 ospheres have the potential to constrain their migration mechanisms which 
 have thus far remained elusive based on dynamical measurements. I will dis
 cuss observational constraints from existing data sets along with several 
 open questions in this new frontier.
LOCATION:Martin Ryle Seminar Room\, Kavli Institute
END:VEVENT
END:VCALENDAR