Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...357..630w&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 357, July 10, 1990, p. 630-637. Research supported by NSERC, CNRS, and Nati
Astronomy and Astrophysics
Astrophysics
38
Binary Stars, Space Observations (From Earth), Stellar Oscillations, Telescopes, Variable Stars, White Dwarf Stars, Companion Stars, Light Curve, Stellar Mass, Visual Photometry
Scientific paper
An extensive set of high-speed photometric observations obtained with the Whole Earth Telescope network is used to show that the complex light curve of the ZZ Zeti (DAV) star G29-38 is dominated by a single, constant amplitude period of 615 s during the time span of these observations. The pulse arrival times for this period exhibit a systematic variation in phase readily explained by light-travel time effects produced by reflex orbital motion about an unseen companion. The best-fit model to the observations indicates a highly eccentric orbit, a period of 109 + or - 13 days and a minimum mass of 0.5 solar mass for the companion.
Achilleos Nicholas
Ashoka B. N.
Augusteijn Th.
Bradley Paul Andrew
Chevreton M.
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