2013MNRAS.434..142B


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.20CET16:40:35

2013MNRAS.434..142B - Mon. Not. R. Astron. Soc., 434, 142-147 (2013/September-1)

The first spectroscopically identified L dwarf in Praesepe.

BOUDREAULT S. and LODIEU N.

Abstract (from CDS):

We have obtained a low-resolution optical spectrum for one of the faintest cluster member candidates in Praesepe with the Optical System for Imaging and low Resolution Integrated Spectroscopy mounted on the 10.4m Gran Telescopio de Canarias. We confirm spectroscopically the first L dwarf member in Praesepe, UGCS J084510.66+214817.1. We derived an optical spectral type of L0.3±0.4 and estimated its effective temperature to Teff = 2279±371K and a mass of 71.1±23.0 MJup, according to state-of-the-art models, placing it at the hydrogen-burning boundary. We measured the equivalent width of the gravity-sensitive sodium doublet at 8182/8194Å, which adds credit to the membership of this new L dwarf to Praesepe. We also derived a probability of ∼ 20.5percent that our candidate would be a field L0 dwarf. We conclude that this object is likely to be a true member of Praesepe, with evidence of being a binary system.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): techniques: spectroscopic - brown dwarfs - stars: fundamental parameters - stars: low-mass - open clusters and associations: individual: Praesepe

Simbad objects: 23

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Number of rows : 23

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 Cl Blanco 1 OpC 00 04 07 -29 50.0           ~ 228 0
2 2MASSW J0030438+313932 BD* 00 30 43.8419947723 +31 39 32.086027421           L3.2V 15 1
3 SIPS J0058-0651 BD* 00 58 42.5480333216 -06 51 24.027819500         17.671 L0V 28 0
4 2MASSW J0147334+345311 BD* 01 47 33.45 +34 53 11.2           L1.0V 11 0
5 2MASS J02512220+2521236 BD* 02 51 22.209 +25 21 23.62           M9V 8 0
6 Cl Melotte 20 OpC 03 26 42 +48 48.0           ~ 744 0
7 NGC 1333 SFR 03 28 55 +31 22.2   10.9       ~ 1193 1
8 Cl* Melotte 22 KPNO 2 BD* 03 45 43.1604506693 +25 40 23.246972754         17.36 L0 112 0
9 Cl Melotte 22 OpC 03 47 00 +24 07.0           ~ 2924 0
10 Cl Melotte 25 OpC 04 26 54.00 +15 52 00.0           ~ 2604 0
11 NAME Taurus Dark Cloud SFR 04 41.0 +25 52           ~ 3355 0
12 BD+52 913 WD* 05 05 30.6182785658 +52 49 51.920797126 10.25 11.44 11.69 11.93 12.108 DA.8 966 0
13 NAME Trapezium Cluster As* 05 35 16.5 -05 23 14           ~ 1439 1
14 NAME sigma Orionis Cluster MGr 05 38 42 -02 36.0           ~ 475 0
15 NGC 2632 OpC 08 40 24 +19 40.0           ~ 1190 0
16 IC 2391 OpC 08 40 32 -53 02.0           ~ 707 0
17 UGCS J084510.65+214817.0 BD* 08 45 10.66 +21 48 17.1           L0.3 3 0
18 NAME Cha I MoC 11 06 48 -77 18.0           ~ 942 1
19 2MASS J14392836+1929149 BD* 14 39 28.369 +19 29 14.98           L1 116 0
20 NAME Upper Sco Association As* 16 12 -23.4           ~ 971 1
21 NAME rho Oph Cluster Cl* 16 26 22 -24 23.7           ~ 44 0
22 Ross 640 WD* 16 28 25.0030292072 +36 46 15.849157470   14.01   13.9   DZA5.5 163 0
23 2MUCD 11712 PM* 17 33 18.9384387888 +46 33 59.240373243           M9.5V 13 0

    Equat.    Gal    SGal    Ecl

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2020.01.20-16:40:35

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