Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-01-13
Astrophys.J. 628 (2005) 439-452
Astronomy and Astrophysics
Astrophysics
Accepted for publication in The Astrophysical Journal, 44 pages w/ 14 figures
Scientific paper
10.1086/430730
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.
Jr.
Bagnuolo William G.
Baines Ellyn K.
Belle Gerald van
Berger David Harold
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