2007ApJ...661.1112V

Query : 2007ApJ...661.1112V

2007ApJ...661.1112V - Astrophys. J., 661, 1112-1118 (2007/June-1)

LP 133-373: a new chromospherically active eclipsing dMe binary with a distant, cool white dwarf companion.

VACCARO T.R., RUDKIN M., KAWKA A., VENNES S., OSWALT T.D., SILVER I., WOOD M. and SMITH J.A.

Abstract (from CDS):

We report the discovery of the partially eclipsing binary LP 133-373. Nearly identical eclipses along with observed photometric colors and spectroscopy indicate that it is a pair of chromospherically active dM4 stars in a circular 1.6 day orbit. Light and velocity curve modeling to our differential photometry and velocity data show that each star has a mass and radius of 0.340±0.014 M☉ and 0.33±0.02 R☉. The binary is itself part of a common proper motion pair with LP 133-374, a cool DC or possible DA white dwarf with a mass of 0.49-0.82 M☉, which would make the system at least 3 Gyr old.

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Journal keyword(s): Stars: Binaries: Eclipsing - Stars: Activity - stars: individual (LP 133-373) - stars: individual (LP 133-374) - Stars: Late-Type - Stars: White Dwarfs

Simbad objects: 3

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Number of rows : 3
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 HD 1326B PM* 00 18 25.8251408611 +44 01 38.092431857   12.84 11.04 10.3   M3.5V 317 0
2 LP 133-373 EB* 14 04 08.8829131392 +50 20 38.642975844   16.3   15.2   ~ 27 0
3 LP 133-374 WD* 14 04 09.3230646720 +50 20 35.803792500     18.42 17.7   DC 15 0

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