Angular Diameters of O- and B-type Stars. Issue Volume 9:Issue S307(2014) (23rd January 2015)

• Record Type: Journal Article
• Authors: Gordon, Kathryn; Gies, Douglas; Schaefer, Gail
• Editors: Meynet, Georges; Georgy, Cyril; Groh, José; Stee, Philippe
• Is Part Of: Proceedings of the International Astronomical Union. Volume 9:Issue S307(2014)
• Page Start: 293
• Page End: 294
• Publication Date: 2015-01-23
• Subjects: stars: fundamental parameters (classification, colors, luminosities, masses, radii, temperatures, etc.), -- techniques: interferometric; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921314006978
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: We are observing a sample of 10 O-type stars and 60 B-type stars to determine angular diameters using the Center for High Angular Resolution Astronomy (CHARA) Array, the foremost optical long baseline interferometer in the world. Our goal is to establish accurate stellar parameters to test modern theories of stellar evolution that include rotation. We will combine our stellar angular diameter measurements with flux and line measurements from spectroscopy, projected rotational velocities, and distances to determine radius, effective temperature, luminosity, equatorial rotational velocity, and evolutionary mass. Knowing these properties will allow us to place the stars in a Hertzsprung-Russell diagram and obtain estimates for the age and evolutionary state.