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VERSION:2.0
PRODID:icalendar-ruby
CALSCALE:GREGORIAN
X-WR-CALNAME:Cornell Department of Astronomy & Space Sciences Fall 2023 Col
 loquium Series 
X-WR-TIMEZONE:Eastern Time (US & Canada)
BEGIN:VEVENT
DTSTAMP:20260518T161839Z
UID:tag:localist.com\,2008:EventInstance_43834524110794
DTSTART:20230907T193000Z
DTEND:20230907T203000Z
DESCRIPTION:"IT TAKES TWO:\nON THE SECULAR AND STOCHASTIC DYNAMICS\nOF THE 
 WEIRD WIDE BINARIES IN THE MILKY WAY"\n\nAbstract: ABSTRACT\nThanks to GAI
 A\, ultra-wide stellar binaries have recently reasserted themselves as key
  probes of\nthe Galactic environment\, of dark matter substructure\, and e
 ven of our understanding of gravity\nitself. Wide binaries are also a theo
 rist’s dream: a system which in isolation is exactly solvable\, and\nwho
 se dynamical evolution due to (i) stochastic kicks from passing stars\, mo
 lecular clouds\, etc.\, and\n(ii) secular torques from the Galactic tide\,
  can be predicted beautifully with perturbation theory. In\nthis talk I wi
 ll first describe some of the curious observations that have arisen around
  wide binaries\nin the last few years. I’ll then focus on the highly unu
 sual ‘superthermal’ distribution of wide binary\neccentricities. Using
  Hamiltonian dynamics and kinetic theory\, I will prove that neither effec
 t (i) or\n(ii) can be responsible for producing this superthermal distribu
 tion\, and explain what this tells us\nabout wide binary formation mechani
 sms. I will conclude with some predictions that can be tested\nwith future
  GAIA data releases.\nBased upon Hwang et al. (2022)\; Hamilton (2022)\; M
 odak & Hamilton (2023)\; Xu et al. (2023).
GEO:42.448891;-76.48114
LOCATION:Space Sciences Building\, 105
SUMMARY:Cornell Department of Astronomy & Space Sciences Fall 2023 Colloqui
 um Series 
URL;VALUE=URI:https://events.cornell.edu/event/cornell_department_of_astron
 omy_space_sciences_fall_2023_colloquium_series_4896
CATEGORIES:Colloquium
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