1401.1405v1.pdf (282.49 kB)
Irradiated brown dwarfs
journal contributionposted on 2016-11-16, 16:07 authored by S. L. Casewell, M. R. Burleigh, K. A. Lawrie, P. F. L. Maxted, P. D. Dobbie, R. Napiwotzki
We have observed the post common envelope binary WD0137-349 in the near infrared $J$, $H$ and $K$ bands and have determined that the photometry varies on the system period (116 min). The amplitude of the variability increases with increasing wavelength, indicating that the brown dwarf in the system is likely being irradiated by its 16500 K white dwarf companion. The effect of the (primarily) UV irradiation on the brown dwarf atmosphere is unknown, but it is possible that stratospheric hazes are formed. It is also possible that the brown dwarf (an L-T transition object) itself is variable due to patchy cloud cover. Both these scenarios are discussed, and suggestions for further study are made.
SLC acknowledges support from the College of Science and Engineering at the University of Leicester. This work made use of data from the Anglo-Australian Telescope.
CitationJournal of the Italian Astronomical Society / Memorie Della Società Astronomica Italiana (2013) Vol. 84, No. 4 1022
Author affiliation/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Physics and Astronomy
SourceBrown dwarfs come of age Fuerteventura, Canary Islands, 2013
- AM (Accepted Manuscript)