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Photospheric and circumstellar variability of the rapidly rotating O star HD 93521

Published online by Cambridge University Press:  26 May 2016

A. W. Fullerton ,
D. R. Gies  and
C. T. Bolton
A. W. Fullerton
Affiliation:
Bartol Research Institute, University of Delaware, Newark, DE 19716-4793 U.S.A.
D. R. Gies
Affiliation:
Dept. of Physics & Astronomy, Georgia State University, Atlanta, GA 30303 U.S.A.
C. T. Bolton
Affiliation:
David Dunlap Observatory, P.O. Box 360, Richmond Hill, Ont. CANADA L4C 4Y6

Extract

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HD 93521 is an O9.5 V star with several well-documented peculiarities, including: an extremely large projected rotational velocity (400 km/s according to Conti & Ebbets 1977); absorption line profile variations (Fullerton 1990); weak emission at Hα (Irvine 1989); evidence for a rotationally-modified stellar wind in its UV resonance lines (Massa 1992; Howarth & Reid 1993); and stellar wind variability in the form of discrete absorption components (Prinja & Howarth 1986). Thus, HD 93521 provides an ideal laboratory for studying the interaction between rapid rotation and variability in both photospheric layers and the circumstellar environment.

Type
1. Pulsation and Rotation
Information
Symposium - International Astronomical Union , Volume 162: Pulsation, Rotation and Mass Loss in Early-Type Stars , 1994 , pp. 114 - 115
Copyright
Copyright © Kluwer 1994 

References

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