2005ApJ...628..439M

Query : 2005ApJ...628..439M

2005ApJ...628..439M - Astrophys. J., 628, 439-452 (2005/July-3)

First results from the CHARA array. I. An interferometric and spectroscopic study of the fast rotator α Leonis (Regulus).

McALISTER H.A., TEN BRUMMELAAR T.A., GIES D.R., HUANG W., BAGNUOLO W.G.Jr, SHURE M.A., STURMANN J., STURMANN L., TURNER N.H., TAYLOR S.F., BERGER D.H., BAINES E.K., GRUNDSTROM E., OGDEN C., RIDGWAY S.T. and VAN BELLE G.

Abstract (from CDS):

We report on K-band interferometric observations of the bright, rapidly rotating star Regulus (type B7 V) made with the CHARA Array on Mount Wilson, California. Through a combination of interferometric and spectroscopic measurements, we have determined for Regulus the equatorial and polar diameters and temperatures, the rotational velocity and period, the inclination and position angle of the spin axis, and the gravity darkening coefficient. These first results from the CHARA Array provide the first interferometric measurement of gravity darkening in a rapidly rotating star and represent the first detection of gravity darkening in a star that is not a member of an eclipsing binary system.

Abstract Copyright: ∼

Journal keyword(s): Infrared: Stars - Stars: Fundamental Parameters - Stars: Individual: Constellation Name: α Leonis - Stars: Individual: Name: Regulus - Stars: Rotation - Techniques: Interferometric

Simbad objects: 10

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Number of rows : 10
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 Eri Be* 01 37 42.84548 -57 14 12.3101 -0.36 0.30 0.46 0.49 0.60 B6Vpe 495 1
2 HD 22780 Be* 03 41 07.8571995216 +37 34 48.707896728 5.09 5.50 5.57     B7Vn 101 0
3 HD 83362 * 09 38 16.0587233064 +12 44 10.667286096 8.240 7.640 6.740     G8III 24 0
4 HD 87884 PM* 10 08 12.7878641256 +11 59 49.059655008 9.45 9.035 8.144 7.6   K0Ve 83 1
5 * alf Leo PM* 10 08 22.31099 +11 58 01.9516 0.88 1.24 1.40 1.37 1.47 B8IVn 891 1
6 * 19 Sex PM* 10 12 48.3646193304 +04 36 52.837757280   6.957 5.781     K0III: 42 0
7 * zet Oph Be* 16 37 09.5400587698 -10 34 01.509742704 1.73 2.58 2.56 2.46 2.50 O9.2IVnn 1908 0
8 * 21 Aql a2* 19 13 42.7011956712 +02 17 37.310297604 4.67 5.08 5.15     B8III 243 0
9 * alf Aql dS* 19 50 46.99855 +08 52 05.9563 1.07 0.98 0.76 0.62 0.49 A7Vn 919 1
10 * 25 Peg Be* 22 07 50.3038755192 +21 42 10.536282684 5.27 5.68 5.78     B7Vne 119 0

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