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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-4743
DTSTART:20180208T213000Z
DTEND:20180208T230000Z
DTSTAMP:20260408T070506Z
LAST-MODIFIED:20180201T172821Z
LOCATION:4421 Sterling Hall\, Coffee and cookies 3:30 PM\, Talk Begins
  3:45 PM
SUMMARY:Stellar Binaries: a Testbed for Planetary Formation and Dynami
 cs\, Astronomy Colloquium\, Diego Munoz\, Northwestern University
DESCRIPTION:Stellar binaries play an important role in the formation a
 nd evolution of planets. Planets and protoplanetary disks *within* bin
 aries are subject to external perturbations that can alter the orbital
  and hydrodynamical evolution of these systems. Similarly\, planets an
 d protoplanetary disks *around* stellar binaries are expected to exhib
 it a distinct behavior from that of their single-star counterparts. Ye
 t\, observations suggest that binaries are able to form planets withou
 t much difficulty. In this talk\, I will address different cases of pl
 anet formation and dynamics under the influence of additional stellar 
 companions\, spanning different stages of stellar evolution. I will di
 scuss the hydrodynamics of circumbinary accretion\, and argue that clo
 se-in T-Tauri stars provide a unique laboratory to explore the links b
 etween star and planet formation. I will describe what we have learned
  about the influence of external stellar companions on long-term plane
 tary dynamics -- focusing on high-eccentricity migration -- and what p
 uzzles still remain behind the origins of hot Jupiters. I will explain
  some of the mechanisms behind the dearth of transiting planets around
  the most compact main sequence (Solar mass) binaries\, and how such p
 lanets could be in hiding. Finally\, I will address the role of binari
 es in the post main sequence\, presenting a hypothetical scenario in w
 hich binaries could contribute to the puzzling atmospheric pollution o
 bserved in nearly 30% of white dwarfs.
URL:https://www.physics.wisc.edu/events/?id=4743
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