2009ApJ...698..405R


Query : 2009ApJ...698..405R

2009ApJ...698..405R - Astrophys. J., 698, 405-409 (2009/June-2)

Discovery of the widest very low mass field binary.

RADIGAN J., LAFRENIERE D., JAYAWARDHANA R. and DOYON R.

Abstract (from CDS):

We present the discovery of the widest (∼6700 AU) very low mass (VLM) field binary to date, found in a proper motion cross-match of the Sloan Digital Sky Survey and the Two Micron All Sky Survey. Our follow-up J-band imaging provides a 10 year baseline for measuring proper motions. Consequently, we are able to confirm the common proper motion of the pair to within 10 mas, implying a 99.5% probability of their physical association. Near-infrared spectra of the components indicate spectral types of M6±1 and M7±1. The system resides at a spectroscopic distance of 105±13 pc and has an angular separation of 63".38±0".05. We have used evolutionary models to infer component masses of 0.105+0.029–0.017M and 0.091+0.010–0.007M. The large separation and low binding energy of this system can provide constraints for formation models of VLM stars.

Abstract Copyright:

Journal keyword(s): binaries: general - stars: formation - stars: individual (2MASS J12583501+4013083, 2MASS J12583798+4014017) - stars: low-mass, brown dwarf

Simbad objects: 17

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Number of rows : 17
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 Koenigstuhl 1A PM* 00 21 10.7415621912 -42 45 40.169294748         13.92 M6 14 0
2 LP 714-37 ** 04 10 48.10248 -12 51 42.1488   18.4   15.0 12.99 M5.5+M8.0+M8.5 24 0
3 Ross 47 BY* 05 42 09.2676872099 +12 29 21.604835564 14.264 13.130 11.509 10.298 8.709 M4V 251 0
4 V* QY Aur SB* 07 10 01.8335758745 +38 31 46.086503300   13.26 11.52 11.12   M4.5Ve 220 0
5 G 51-15 Er* 08 29 49.3527921926 +26 46 33.624143059   16.87   14.736   M6.5Ve 273 0
6 LP 213-68 ** 10 47 13.7778721616 +40 26 49.263789176   21.2   19.1   M8+L0 33 0
7 DENIS J104814.6-395606 LM* 10 48 14.5736104113 -39 56 06.842743867     17.532 15.051 12.67 M8.5Ve: 123 0
8 Wolf 359 Er* 10 56 28.9208702274 +07 00 53.003285286 16.706 15.541 13.507 11.684 9.507 dM6 683 0
9 HD 109615 * 12 35 47.3272995216 +39 41 01.320968760   7.246 7.275     A0V 42 0
10 2MASS J12583501+4013083 PM* 12 58 35.0156879736 +40 13 08.141312100           M6 6 0
11 2MASS J12583798+4014017 LM* 12 58 37.9936068960 +40 14 01.592669328           M8 4 0
12 G 124-62 PM* 14 41 35.8329036192 -09 46 38.701925184   12.58 11.80 12.33   dM4.5e 23 0
13 [PGZ2001] J160611.9-193532 Y*O 16 06 11.9975342784 -19 35 33.238942152           M5e 18 0
14 VB 8 Er* 16 55 35.2557374336 -08 23 40.753073075   18.7 16.916 14.566 12.24 M7Ve 414 0
15 VB 10 Er* 19 16 57.6109547886 +05 09 01.600923413     17.30     M8V 462 1
16 G 208-44 Er* 19 53 54.4821159649 +44 24 51.341564299   15.31 13.126 13.083 9.78 M5.5Ve 204 1
17 V* EZ Aqr Er* 22 38 33.576000 -15 17 59.75700 15.762 14.33 12.38 12.12 8.677 M5V 294 1

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2022.10.02-21:52:45

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