2008ApJ...682L.117G

Query : 2008ApJ...682L.117G

2008ApJ...682L.117G - Astrophys. J., 682, L117-L120 (2008/August-1)

A spectroscopic orbit for Regulus.

GIES D.R., DIETERICH S., RICHARDSON N.D., RIEDEL A.R., TEAM B.L., McALISTER H.A., BAGNUOLO W.G.Jr, GRUNDSTROM E.D., STEFL S., RIVINIUS T. and BAADE D.

Abstract (from CDS):

We present a radial velocity study of the rapidly rotating B star Regulus that indicates the star is a single-lined spectroscopic binary. The orbital period (40.11 days) and probable semimajor axis (0.35 AU) are large enough that the system is not interacting at present. However, the mass function suggests that the secondary has a low mass (M2>0.30 M☉), and we argue that the companion may be a white dwarf. Such a star would be the remnant of a former mass donor that was the source of the large spin angular momentum of Regulus itself.

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Journal keyword(s): Stars: Binaries: Spectroscopic - Stars: Early-Type - Stars: Individual: Name: Regulus - Stars: Individual: Constellation Name: α Leonis

VizieR on-line data: <Available at CDS (J/ApJ/682/L117): table1.dat table2.dat>

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 * alf CMa SB* 06 45 08.91728 -16 42 58.0171 -1.51 -1.46 -1.46 -1.46 -1.43 A0mA1Va 1610 0
2 HD 87884 PM* 10 08 12.7878641256 +11 59 49.059655008 9.45 9.035 8.144 7.6   K0Ve 83 1
3 * alf Leo PM* 10 08 22.31099 +11 58 01.9516 0.88 1.24 1.40 1.37 1.47 B8IVn 891 1

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