On the period and nature of the light and radial-velocity variations of HD 25799

Details On the period and nature of the light and radial-velocity variations of HD 25799 On the period and nature of the light and radial-velocity variations of HD 25799

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988pasp..100..954m&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 100, Aug. 1988, p. 954-963. NSERC-supported research.

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3

Binary Stars, Radial Velocity, Stellar Models, Variability, Variable Stars, Astronomical Photometry, Light Curve, Periodic Variations, Stellar Orbits

Scientific paper

Reanalysis of the published radial velocities of the supposed spectroscopic binary HD 25799 shows that its period is 0.9121679 day rather than the 10.67 days found by Blaauw and van Albada (1963). New photometric observations of this star were obtained during the period 1981-87. Comparison of light curves formed from these observations with each other and with light curves formed from archival data shows that the amplitude and possibly the shape of the light curve are variable. These changes cannot be explained by a binary star model. The similarity of the light and velocity variations to those of B stars that are believed to be nonradial pulsators argues that HD 25799 is a member of this group.

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