Brown Dwarfs, Dusty Photospheres, and Surface Gravity
Abstract
We present new spectroscopic, photometric, and astrometric measurements of two nearby unusually dusty brown dwarfs. We show that the dusty photosphere in WISE 0047+68 is due to intermediate surface gravity (between most field brown dwarfs and planets) and not caused by high metallicity. We determine the luminosity and show that it implies an effective temperature of ~1300K, normally typical of T dwarfs. On the other hand, we confirm that other red L dwarfs do not have low surface gravity.
- Publication:
-
American Astronomical Society Meeting Abstracts #224
- Pub Date:
- June 2014
- Bibcode:
- 2014AAS...22432213G