Photospheric and Circumstellar Variability of the Rapidly Rotating O Star HD 93521

Fullerton, A. W.; Gies, D. R.; Bolton, C. T.

doi:10.1007/978-94-011-1030-3_35

A. W. Fullerton⁴,
D. R. Gies⁵ &
C. T. Bolton⁶

Part of the book series: International Astronomical Union / Union Astronomique Internationale ((IAUS,volume 162))

93 Accesses
5 Citations

Abstract

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.

This is a preview of subscription content, log in via an institution to check access.

Access this chapter

Log in via an institution

Chapter: USD 29.95; Price excludes VAT (USA)

eBook: USD 39.99; Price excludes VAT (USA)

Softcover Book: USD 54.99; Price excludes VAT (USA)

Tax calculation will be finalised at checkout

Purchases are for personal use only

Institutional subscriptions

References

Bjorkman, J. E., and Cassinelli, J. P.: 1993, Astrophysical Journal 409, 429
Article ADS Google Scholar
Conti, P. S., and Ebbets, D.: 1977, Astrophysical Journal 213, 438
Article ADS Google Scholar
Fullerton, A. W.: 1990, Ph.D. thesis, University of Toronto
Google Scholar
Gies, D. R., and Kullavanijaya, A.: 1988, Astrophysical Journal 326, 813
Article ADS Google Scholar
Howarth, I. D., and Reid, A. H. N.: 1993, Astronomy and Astrophysics, in press
Google Scholar
Irvine, N. J.: 1989, Astrophysical Journal 337, L33
Article ADS Google Scholar
Massa, D. L.: 1992, in L. Drissen, C. Leitherer, A. Nota, ed(s)., Nonisotropic and Variable Outflows from Stars, ASP: San Francisco, 84
Google Scholar
Prinja, R. K., and Howarth, I. D.: 1986, Astrophysical Journal, Supplement Series 61, 357
Article ADS Google Scholar

Download references

Author information

Authors and Affiliations

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

Authors

A. W. Fullerton
View author publications
You can also search for this author in PubMed Google Scholar
D. R. Gies
View author publications
You can also search for this author in PubMed Google Scholar
C. T. Bolton
View author publications
You can also search for this author in PubMed Google Scholar

Editor information

Editors and Affiliations

South African Astronomical Observatory, Cape Town, South Africa
Luis A. Balona
Astronomical Institute, University of Amsterdam, Amsterdam, The Netherlands
Huib F. Henrichs
Observatoire de la Côte d’Azur, Nice, France
Jean Michel Le Contel

Rights and permissions

Reprints and permissions

Copyright information

About this paper

Cite this paper

Fullerton, A.W., Gies, D.R., Bolton, C.T. (1994). Photospheric and Circumstellar Variability of the Rapidly Rotating O Star HD 93521. In: Balona, L.A., Henrichs, H.F., Le Contel, J.M. (eds) Pulsation, Rotation and Mass Loss in Early-Type Stars. International Astronomical Union / Union Astronomique Internationale, vol 162. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-1030-3_35

Download citation

DOI: https://doi.org/10.1007/978-94-011-1030-3_35
Publisher Name: Springer, Dordrecht
Print ISBN: 978-0-7923-3045-5
Online ISBN: 978-94-011-1030-3
eBook Packages: Springer Book Archive

Publish with us

Policies and ethics