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SUMMARY:Life After (Stellar) Death:  Habitability Around White Dwarfs - Th
 ea Kozakis (National Space Institute\, Technical University of Denmark)
DTSTART:20210601T120000Z
DTEND:20210601T130000Z
UID:TALK158653@talks.cam.ac.uk
CONTACT:Paul B. Rimmer
DESCRIPTION:We stand on the edge of an era where we will be able to begin 
 characterizing the atmospheres of terrestrial planets\, putting us on the 
 path to answer one of humanity's most compelling questions: are we alone i
 n the universe? Although many searches focus on transiting planets around 
 M dwarfs\, the similar sizes of white dwarfs and Earth would result in sig
 nificantly higher transit depths around such stellar remnants\, and enable
  easier characterization of terrestrial planets via transit spectroscopy. 
 Additionally the recent discovery of the first transiting planet around a 
 white dwarf has proven that planets can survive on close orbits in these s
 ystems.  However\, an Earth-like exoplanet orbiting a white dwarf would be
  exposed to different UV environments than Earth\, influencing both its at
 mospheric photochemistry and UV surface environment.  In this talk I will 
 discuss the evolving habitable zones around white dwarfs\, how the differe
 nt UV environment would affect potential biosignatures on orbiting Earth-l
 ike planets\, and present simulations of transit observations with the upc
 oming James Webb Space Telescope.
LOCATION:ONLINE - Details to be sent by email
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