Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-09-20
2007ApJ...669L..97L
Astronomy and Astrophysics
Astrophysics
8 pages - emulateapj style, 2 figures, 3 tables. Accepted to ApJL. Fixed typos, added reference, added footnote
Scientific paper
10.1086/523812
We report the discovery of a fifth candidate substellar system in the ~5-10 Myr TW Hydrae Association - DENIS J124514.1-442907. This object has a NIR spectrum remarkably similar to that of 2MASS J1139511-315921, a known TW Hydrae brown dwarf, with low surface gravity features such as a triangular-shaped H-band, deep H2O absorption, weak alkali lines, and weak hydride bands. We find an optical spectral type of M9.5 and estimate a mass of <24 M_Jup, assuming an age of ~5-10 Myr. While the measured proper motion for DENIS J124514.1-442907 is inconclusive as a test for membership, its position in the sky is coincident with the TW Hydrae Association. A more accurate proper motion measurement, higher resolution spectroscopy for radial velocity, and a parallax measurement are needed to derive the true space motion and to confirm its membership.
Burgasser Adam Jonathan
Kirkpatrick Joseph D.
Looper Dagny L.
Swift Brandon J.
No associations
LandOfFree
Discovery of an M9.5 Candidate Brown Dwarf in the TW Hydrae Association - DENIS J124514.1-442907 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 an M9.5 Candidate Brown Dwarf in the TW Hydrae Association - DENIS J124514.1-442907, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Discovery of an M9.5 Candidate Brown Dwarf in the TW Hydrae Association - DENIS J124514.1-442907 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-518366