2008ApJ...678L.125B

Query : 2008ApJ...678L.125B

2008ApJ...678L.125B - Astrophys. J., 678, L125-L128 (2008/May-2)

A spectroscopic binary at the M/L transition.

BLAKE C.H., CHARBONNEAU D., WHITE R.J., TORRES G., MARLEY M.S. and SAUMON D.

Abstract (from CDS):

We report the discovery of a single-lined spectroscopic binary with an ultracool dwarf (UCD) primary with a spectral type between M8 and L0.5. This system was discovered during the course of an ongoing survey to monitor L dwarfs for radial velocity variations and is the first known small-separation (a<1 AU) spectroscopic binary among dwarfs at the M/L transition. Based on radial velocity measurements with a typical precision of 300 m/s, we estimate the orbital parameters of this system to be P=246.73±0.49 days, a₁sini=0.159±0.003 AU, and M₂sini=0.2062(M₁+M₂)^2/3±0.0034 M_☉. Assuming a primary mass of M₁=0.08 M_☉(based on spectral type), we estimate the secondary minimum mass to be M₂sini=0.054 M_☉. With future photometric, spectroscopic, and interferometric observations it may be possible to determine the dynamical masses of both components directly, making this system one of the best-characterized UCD binaries known.

Abstract Copyright: ∼

Journal keyword(s): Stars: Low-Mass, Brown Dwarfs - Techniques: Radial Velocities

Simbad objects: 1

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Number of rows : 1

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 J03202839-0446358	BD*	03 20 28.3630482681	-04 46 36.396685568						M8.5+T5	49	0

Query : 2008ApJ...678L.125B

Basic data :

2MASS J03202839-0446358 -- Brown Dwarf

* (CNS5,Gaia), IR (2MASSI,2MASSW), BD* (2008MNRAS), LM* (2003AJ), SB* (SBC9), PM* (2018yCat), NIR (2MASS), MIR (WISEA)

03 20 28.3630482681 -04 46 36.396685568 (Optical) [ 0.4165 0.3765 90 ] A 2020yCat.1350....0G

03 17 59.7236969220 -04 56 56.969068032 [ 0.4165 0.3765 90 ]

187.4486653987659 -48.0614216702634 [ 0.4165 0.3765 90 ]

-229.059 -525.416 [0.470 0.461 90] A 2020yCat.1350....0G

V(km/s) 3.13 [0.06] / z(spectroscopic) 0.000010 [0.000000] / cz 3.13 [0.06] (Opt) C 2010ApJ...723..684B

47.6021 [0.4978] A 2020yCat.1350....0G

M8.5+T5 C 2008ApJ...681..579B

G 17.904428 [0.003682] C 2020yCat.1350....0G

J 13.259 [0.024] C 2003yCat.2246....0C

H 12.535 [0.023] C 2003yCat.2246....0C

K 12.134 [0.026] C 2003yCat.2246....0C

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`2MASS J03202839-0446358`	`2MASSW J0320284-044636`	`WISEA J032028.19-044642.0`
`CNS5 845`	`SBC9 3013`	`Gaia DR2 5182151481717042944`
`2MASSI J0320283-044635`	`TIC 279073517`	`Gaia DR3 5182151481717042944`

References (49 between 1850 and 2026) (Total 49)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

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2MASS J03202839-0446358 2MASSI J0320283-044635 WISEA J032028.19-044642.0 Gaia DR2 5182151481717042944 Gaia DR3 5182151481717042944

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