Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-01-11
Astrophys.J.531:L57-L60,2000
Astronomy and Astrophysics
Astrophysics
13 pages, 2 figures, 2 tables, accepted by ApJL
Scientific paper
10.1086/312522
We report the discovery of a widely separated (258$\farcs3\pm0\farcs$4) T dwarf companion to the Gl 570ABC system. This new component, Gl 570D, was initially identified from the Two Micron All Sky Survey (2MASS). Its near-infrared spectrum shows the 1.6 and 2.2 $\micron$ CH$_4$ absorption bands characteristic of T dwarfs, while its common proper motion with the Gl 570ABC system confirms companionship. Gl 570D (M$_J$ = 16.47$\pm$0.07) is nearly a full magnitude dimmer than the only other known T dwarf companion, Gl 229B, and estimates of L = (2.8$\pm$0.3)x10$^{-6}$ L$_{\sun}$ and T$_{eff}$ = 750$\pm$50 K make it significantly cooler and less luminous than any other known brown dwarf companion. Using evolutionary models by Burrows et al. and an adopted age of 2-10 Gyr, we derive a mass estimate of 50$\pm$20 M$_{Jup}$ for this object.
Beichman Charles Arnold
Brown Michael E.
Burgasser Adam Jonathan
Cutri Roc M.
Dahn Conard C.
No associations
LandOfFree
Discovery of a Brown Dwarf Companion to Gliese 570ABC: A 2MASS T Dwarf Significantly Cooler than Gliese 229B does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Discovery of a Brown Dwarf Companion to Gliese 570ABC: A 2MASS T Dwarf Significantly Cooler than Gliese 229B, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Discovery of a Brown Dwarf Companion to Gliese 570ABC: A 2MASS T Dwarf Significantly Cooler than Gliese 229B will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-686176