2006ApJ...643L.123K

Query : 2006ApJ...643L.123K

2006ApJ...643L.123K - Astrophys. J., 643, L123-L126 (2006/June-1)

LP 400-22, a very low mass and high-velocity white dwarf.

KAWKA A., VENNES S., OSWALT T.D., SMITH J.A. and SILVESTRI N.M.

Abstract (from CDS):

We report the identification of LP 400-22 (WD 2234+222) as a very low mass and high-velocity white dwarf. The ultraviolet GALEX and optical photometric colors and a spectral line analysis of LP 400-22 show this star to have an effective temperature of 11,080±140 K and a surface gravity of logg=6.32±0.08. Therefore, this is a helium-core white dwarf with a mass of 0.17 M☉. The tangential velocity of this white dwarf is 414±43 km/s, making it one of the fastest moving white dwarfs known. We discuss probable evolutionary scenarios for this remarkable object.

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Journal keyword(s): Stars: Atmospheres - stars: individual (LP 400-22) - Stars: White Dwarfs

Simbad objects: 6

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Number of rows : 6
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 PSR J1012+5307 Psr 10 12 33.4345449600 +53 07 02.548542576     19.5     DA 419 1
2 GALEX J123410.3-022803 WD* 12 34 10.3676638032 -02 28 02.806799988   17.7   18.4   DA 41 0
3 PSR J1909-3744 Psr 19 09 47.42820 -37 44 14.7740           ~ 343 2
4 PSR J1910-5959A Psr 19 11 42.7562 -59 58 26.900 22.02 22.13 22.03     DA5 99 1
5 LP 400-21 PM* 22 36 06.8061132816 +22 34 06.777496560   18.742   16.2   ~ 8 0
6 LP 400-22 ** 22 36 30.0130703280 +22 32 23.662277484   17.5   17.1   DA+DA 45 1

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