2008MNRAS.385.1771J

Query : 2008MNRAS.385.1771J

2008MNRAS.385.1771J - Mon. Not. R. Astron. Soc., 385, 1771-1778 (2008/April-3)

The ages of L dwarfs.

JAMESON R.F., LODIEU N., CASEWELL S.L., BANNISTER N.P. and DOBBIE P.D.

Abstract (from CDS):

We present a new method to derive the age of young (<0.7 Gyr) L dwarfs based on their near-infrared photometry, colours and distances. The method is based on samples of L dwarfs belonging to the Upper Sco association (5 Myr), the Alpha Per (85 Myr) and Pleiades (125 Myr) clusters, and the Ursa Major (400 Myr) and Hyades (625 Myr) moving groups. We apply our method to a number of interesting objects in the literature, including a known L dwarf binary, L dwarf companions and spectroscopic members of the young σ Orionis cluster.

Abstract Copyright: ©2008 The Authors. Journal compilation © 2008 RAS

Journal keyword(s): stars: low-mass, brown dwarfs - open clusters and associations: general

Simbad objects: 37

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Number of rows : 37
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 2MASS J00325937+1410371 BD* 00 32 59.37576 +14 10 37.1136           L8V 32 0
2 LSPM J0036+1821 BD* 00 36 16.1118891182 +18 21 10.286665966       18.451 16.053 L3.5 230 0
3 2MASS J01075242+0041563 BD* 01 07 52.42200 +00 41 56.3964           L8 64 0
4 DENIS J020529.0-115925 BD* 02 05 29.3651195393 -11 59 29.721210536           L7V 156 0
5 2MASS J02431371-2453298 BD* 02 43 13.71792 -24 53 29.8356           T6.0 55 0
6 Cl Melotte 20 MGr 03 26 50.6 +48 51 48           ~ 928 0
7 Cl* Melotte 22 KPNO 2 BD* 03 45 43.1616128256 +25 40 23.239779672         17.36 L0V 136 0
8 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
9 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
10 [BZR99] S Ori 66 BD* 05 37 24.71064 -02 31 52.3308         23.23 L3.5:e 13 0
11 [BZR99] S Ori 67 BD* 05 38 12.61464 -02 21 36.7956         23.40 L5:e 9 0
12 [BZR99] S Ori 65 BD* 05 38 26.1 -02 23 05         23.23 L3.5: 12 0
13 [BZR99] S Ori 68 BD* 05 38 39.1 -02 28 05         23.77 L5: 25 1
14 NAME sig Ori Cluster OpC 05 38 42 -02 36.0           ~ 623 0
15 [BZR99] S Ori 56 BD* 05 39 00.78768 -02 21 41.8032         21.80 L0.5 13 0
16 [BZR99] S Ori 58 BD* 05 39 03.59736 -02 25 36.6060         21.50 L0e 14 0
17 [BZR99] S Ori 60 BD* 05 39 37.51848 -02 30 41.9220         22.75 L2 20 0
18 [BZR99] S Ori 62 BD* 05 39 42.05208 -02 30 31.6080         23.03 L2:e 13 0
19 UGCS J054009.31-022632.6 BD* 05 40 09.32 -02 26 32.6         20.55 L0 10 0
20 * alf CMa SB* 06 45 08.91728 -16 42 58.0171 -1.51 -1.46 -1.46 -1.46 -1.43 A0mA1Va 1610 0
21 LSPM J0746+2000 BD* 07 46 42.56207 +20 00 32.1839       17.9 15.034 L0+L1.5 201 1
22 2MASSI J0825196+211552 BD* 08 25 19.6125672818 +21 15 51.549358145       21.97 19.22 L7.5V 138 0
23 NAME UMa Region reg 11 00 +50.0           ~ 333 0
24 NAME TW Hya Association As* 11 01.9 -34 42           ~ 1018 0
25 * alf UMa ** 11 03 43.67152 +61 45 03.7249 3.78 2.86 1.79 0.98 0.40 G9III+A7.5 448 0
26 TWA 27 LM* 12 07 33.4675524840 -39 32 54.016625184     19.95 17.99 15.88 M8IVe 376 0
27 TWA 27B BD* 12 07 33.50 -39 32 54.4           L3 321 0
28 2MASS J12171110-0311131 BD* 12 17 11.10288 -03 11 13.1748           T7.5 92 0
29 NAME Ursa Major Moving Group MGr 12 32 +57.0           ~ 467 1
30 2MASS J14460061+0024519 BD* 14 46 00.61560 +00 24 51.9660           L5V 38 0
31 * eta CrB C BD* 15 23 22.63488 +30 14 56.2092           L8V 118 1
32 NAME Upper Sco Association As* 16 12 -23.4           ~ 1586 1
33 NAME Upper Sco-Cen As* 16 15 -24.2           ~ 1497 1
34 2MASS J16241436+0029158 BD* 16 24 14.36712 +00 29 15.8172           T6V 162 0
35 HD 203030 BY* 21 18 58.2195697224 +26 13 49.960929036   9.206 8.426 8.79   K0V 102 0
36 HD 203030B BD* 21 18 58.97 +26 13 46.1           L7.5 77 0
37 NAME Hyades Moving Group MGr ~ ~           ~ 300 0

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