Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...139..123h&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 139, no. 1, Oct. 1984, p. 123-130.
Astronomy and Astrophysics
Astrophysics
16
Apsides, Early Stars, Eclipsing Binary Stars, Stellar Mass, Stellar Motions, Variable Stars, B Stars, Light Curve, Orbits, Stellar Luminosity, Stellar Spectrophotometry
Scientific paper
The present investigation represents the second study in a series devoted to early-type variable stars. The supergiant star HR 7551 is a double-lined spectroscopic binary and also an eclipsing binary. The considered system is important because very little direct evidence is available on the masses of early-type supergiants. Photometric data obtained by Percy (1979) indicated the presence of shallow eclipses with possible periods near 7 or 13 days. Observations considered in the present investigation are related to spectroscopic studies of HR 7551 which were undertaken in 1980 because of Percy's interesting results. Attention is given to primary velocities, secondary velocities, the orbit, apsidal motion, the light curve, equivalent widths, rotational velocity, luminosity ratio, and the derivation of a model.
Fisher Wesley A.
Hill Gary
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