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Interpretation of OAO-2 ultraviolet light curves of beta DoradusMiddle-ultraviolet light curves of beta Doradus, obtained by OAO-2, are presented along with other evidence indicating that the small additional bumps observed on the rising branches of these curves have their origin in shock-wave phenomena in the upper atmosphere of this classical Cepheid. A simple piston-driven spherical hydrodynamic model of the atmosphere is developed to explain the bumps, and the calculations are compared with observations. The model is found to be consistent with the shapes of the light curves as well as with measurements of the H-alpha radial velocities.
Document ID
19760039814
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Hutchinson, J. L.
(Colorado Univ. Boulder, CO, United States)
Lillie, C. F.
(Colorado, University Boulder, Colo., United States)
Hill, S. J.
(Michigan State University East Lansing, Mich., United States)
Date Acquired
August 8, 2013
Publication Date
December 1, 1975
Publication Information
Publication: Astronomical Journal
Volume: 80
Subject Category
Astrophysics
Accession Number
76A22780
Funding Number(s)
CONTRACT_GRANT: NGR-06-003-179
Distribution Limits
Public
Copyright
Other

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