Why care about white dwarfs?
- the picture is to scale!
- really good targets because will have *really* large transit depths
#Exo3pic.twitter.com/AbVJVxgOP9
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Why care about white dwarfs?
- the picture is to scale!
- really good targets because will have *really* large transit depths
#Exo3pic.twitter.com/AbVJVxgOP9
When is the best time to have a habitable zone around a white dwarf?
- you can have a planet in the HZ for 6 Gyr!
#Exo3pic.twitter.com/oNZP9uHOU7
What would its atmosphere look like?
- Modeled with Exo-Prime
- Climate code + photochemistry
#Exo3pic.twitter.com/w0uonEC8Qw
As white dwarf cools:
- Decreased ozone production
- Higher methane abundances
- less temperature inversion
#Exo3pic.twitter.com/uzO0cLAkKx
How much UV reaches the ground?
- Less incident UV around cooler white dwarfs but more surface UV
#Exo3pic.twitter.com/pdGMtOk8yA
Planetary transmission spectra from 0.4 - 20 microns. Larget transit depths!
#Exo3pic.twitter.com/KmuZUIUEW0
Main points from the talk
- HZ is stable for ~2 Gyr after the formation
- Planets would experience steadily decreasing UV flux
- Less incident UV cause less ozone and more methane
- Similar WD-Earth size gives very high transit depths
#Exo3pic.twitter.com/EK6nypYoCQ
Awesome job, Thea! Super cool work. Good luck in Denmark!
For one of my stellar astrophysics classes this past semester, we needed to write a mock telescope proposal, and we decided to use her research as a starting point. I found it completely fascinating, and amazing!
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