2007ApJ...659L..49A


Query : 2007ApJ...659L..49A

2007ApJ...659L..49A - Astrophys. J., 659, L49-L52 (2007/April-2)

Discovery of the widest very low mass binary.

ARTIGAU E., LAFRENIERE D., DOYON R., ALBERT L., NADEAU D. and ROBERT J.

Abstract (from CDS):

We report the discovery of a very low mass binary system (primary mass <0.1 M) with a projected separation of ∼5100 AU, more than twice that of the widest previously known system. A spectrum covering the 1-2.5 µm wavelength interval at R∼1700 is presented for each component. Analysis of the spectra indicates spectral types of M6.5 V and M8 V, and the photometric distance of the system is ∼62 pc. Given that previous studies have established that no more than 1% of very low mass binary systems have orbits larger than 20 AU, the existence of such a wide system has a bearing on very low mass star formation and evolution models.

Abstract Copyright:

Journal keyword(s): Stars: Binaries: General - stars: individual (2MASS J012655.49-502238.8) - stars: individual (2MASS J012702.83-502321.1) - Stars: Low-Mass, Brown Dwarfs

CDS comments: Introd. : Koenigstuhl 1AB = LEHPM 494 (cf. 2007A&A...462L..61C)

Simbad objects: 9

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Number of rows : 9
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 NAME THA As* 00 00 -62.0           ~ 468 0
2 HD 8341 * 01 21 44.3335630872 -52 04 35.434558668   8.72 8.60     A0V 14 0
3 SIPS J0126-5022 PM* 01 26 55.5041078856 -50 22 38.737420464     21.8   17.2 M6.5V 10 0
4 SIPS J0127-5023 PM* 01 27 02.8416837432 -50 23 21.029271684     22.2   17.6 M8V 6 0
5 NAME sig Ori Cluster OpC 05 38 42 -02 36.0           ~ 567 0
6 DENIS J055146.0-443412 ** 05 51 46.05 -44 34 12.8           M8.5+L0 17 0
7 2MASS J11011926-7732383 ** 11 01 19.266 -77 32 38.31       19.4 16.59 M7+M8 36 0
8 NAME Oph 11 ** 16 22 25.21392 -24 05 13.9488       19.4 18.98 M9+M9.5 44 0
9 2MASS J16233609-2402209 Y*? 16 23 36.1201719072 -24 02 20.800406508       17.4 14.68 M5 23 0

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