Poster Open Access

Atmosphere Models of Highly Irradiated Brown Dwarfs

Lothringer, Joshua D.; Casewell, Sarah L.

While highly irradiated brown dwarfs are rare, the handful of known systems provide a unique lens into irradiated atmospheres. Ultra-short-period brown dwarfs around white dwarfs can reach atmospheric temperatures hotter than many stars. Such objects are similar to ultra-hot Jupiters, yet are subject to even more intense UV irradiation, allowing us to test irradiated atmosphere models and reveal new insight into substellar atmospheres. We present 1D PHOENIX atmosphere models and synthetic spectra, as well as retrievals with the PETRA framework, of two highly irradiated brown dwarfs around white dwarfs. Crucially, these models self-consistently include the effects of the intense UV irradiation on the atmosphere. We will show that we can explain the observed presence of a variety of emission lines in these brown dwarfs through the an irradiation-induced temperature inversion, not unlike those recently seen in several ultra-hot Jupiters.

Files (765.1 kB)
Name Size
lothringerj_poster.pdf
md5:263cb34806ba2a3f39fd8ce12f64ee99
575.3 kB Download
lothringerj_posterpng.png
md5:e4d16f1fee924f66c765efca0529bf47
189.8 kB Download
42
41
views
downloads
All versions This version
Views 4242
Downloads 4141
Data volume 23.2 MB23.2 MB
Unique views 3838
Unique downloads 3737

Share

Cite as