2005A&A...440..967S

Query : 2005A&A...440..967S

2005A&A...440..967S - Astronomy and Astrophysics, volume 440, 967-972 (2005/9-4)

The dM4.5e star G124-62 and its binary L dwarf companion DENIS-P J1441-0945. Common proper motion, distance, age, and masses.

SEIFAHRT A., GUENTHER E. and NEUHAEUSER R.

Abstract (from CDS):

We present astrometric and photometric measurements of the field binary L1 dwarf DENIS-P J1441-0945. Analysis of archival HST images and photometric parallax measurements give a distance of 34±7pc and a proper motion close to that of the nearby high proper motion star G124-62. Comparison of SuperCOSMOS and 2MASS images confirms that these objects form a common proper motion pair, while spectroscopy of G124-62 shows it to be a dM4.5e star. The kinematics show that this system is a member of the Hyades supercluster. The resulting age constraints for the system are 500-800 Myr and the mass of each component of DENIS-P J1441-0945 is 0.072^+0.010_–0.018M_☉.

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Journal keyword(s): astrometry - solar neighbourhood - stars: emission-line, Be - stars: low-mass, brown dwarfs

Simbad objects: 5

Full paper

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Number of rows : 5

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2022
1	NVSS J005353+003620	Rad	00 53 53.00	+00 36 17.0					~	1
2	BD+20 2465	Er*	10 19 36.2808181226	+19 52 12.010446571	10.82	9.52	9.19		dM3	1225
3	G 124-62	PM*	14 41 35.8329036192	-09 46 38.701925184	12.58	11.80	12.33		dM4.5e	23
4	DENIS J144137.2-094558	BD*	14 41 37.1567200536	-09 45 59.229849096			20.030	17.234	L1+L1	48
5	NAME Hyades Moving Group	MGr	~	~					~	259

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