2007ApJ...669L..97L


Query : 2007ApJ...669L..97L

2007ApJ...669L..97L - Astrophys. J., 669, L97-L100 (2007/November-2)

Discovery of an M9.5 candidate brown dwarf in the TW Hydrae association: DENIS J124514.1-442907.

LOOPER D.L., BURGASSER A.J., KIRKPATRICK J.D. and SWIFT B.J.

Abstract (from CDS):

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 H2 O absorption, weak alkali lines, and weak hydride bands. We find an optical spectral type of M9.5 and estimate a mass of ≲24 MJup, 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.

Abstract Copyright:

Journal keyword(s): Galaxy: Open Clusters and Associations: Individual: Name: TW Hydrae - stars: individual (DENIS J124514.1-442907) - stars: individual (2MASS J1207334-393254) - stars: individual (2MASS J1139511-315921) - Stars: Low-Mass, Brown Dwarfs

CDS comments: Fig.1 : L0 standard 2MASS 0345 is 2MASS J03454316+2540233 (= V* V1226 Tau)

Simbad objects: 14

goto Full paper

goto View the references in ADS

Number of rows : 14
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 Cl* Melotte 22 KPNO 2 BD* 03 45 43.1616128256 +25 40 23.239779672         17.36 L0V 126 0
2 V* TW Hya TT* 11 01 51.9053285064 -34 42 17.033218380   11.94 10.50 10.626 9.18 K6Ve 1891 1
3 NAME TW Hya Association As* 11 01.9 -34 42           ~ 941 0
4 TWA 28 LM* 11 02 09.8378779824 -34 30 35.562199176     21.46 19.14 17.90 M8.3 69 0
5 CD-33 7795B LM* 11 31 55.2500 -34 36 25.200     20.40   15.8 M8.5/9e 124 0
6 CD-33 7795 TT* 11 31 55.2608963280 -34 36 27.203892120   12.97 11.524 11.150 9.150 M2Ve 190 0
7 HD 100330 * 11 32 36.6700218936 -32 56 46.898910492   8.38 8.36     A0V 12 0
8 TWA 26 LM* 11 39 51.1378374696 -31 59 21.443660124         15.83 M8e 108 0
9 HD 103870 * 11 57 30.6086643864 -38 29 46.571488656   7.33 7.26     A0V 12 0
10 TWA 27 LM* 12 07 33.4675524840 -39 32 54.016625184     19.95 17.99 15.88 M8IVe 336 0
11 TWA 29 LM* 12 45 14.1607780560 -44 29 07.728263340         18.0 M9.5p 48 0
12 HD 114853 PM* 13 13 52.2256885584 -45 11 08.884868676 7.681 7.583 6.940 6.559 6.226 G1.5V 113 0
13 2MASS J14342644+1940499 LM* 14 34 26.4344486472 +19 40 49.753899264           M8V 9 0
14 VB 10 Er* 19 16 57.6109547886 +05 09 01.600923413     17.30     M8V 475 1

To bookmark this query, right click on this link: simbad:objects in 2007ApJ...669L..97L and select 'bookmark this link' or equivalent in the popup menu