Interpretation of OAO-2 ultraviolet light curves of beta Doradus

Details Interpretation of OAO-2 ultraviolet light curves of beta Doradus Interpretation of OAO-2 ultraviolet light curves of beta Doradus

Dec 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975aj.....80.1044h&link_type=abstract

Astronomical Journal, vol. 80, Dec. 1975, p. 1044-1049.

Other

11

Cepheid Variables, Light Curve, Oao 2, Shock Waves, Stellar Atmospheres, Ultraviolet Photometry, Astronomical Models, Hydrodynamics, Line Shape, Radial Velocity, Stellar Rotation, Ubv Spectra

Scientific paper

Middle-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.

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