Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pasp..103...49h&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 103, Jan. 1991, p. 49-62.
Astronomy and Astrophysics
Astronomy
10
B Stars, Binary Stars, Stellar Oscillations, Variable Stars, Radial Velocity, Stellar Orbits, Stellar Spectra
Scientific paper
3 Vul is found to be a single-lined spectroscopic binary with a period of 367 days, very nearly equal to one year. Velocity observations over two decades, in combination with archival data, have produced sufficiently good phase coverage to yield a well-defined orbit. Nonetheless, residuals from a Keplerian velocity curve are large than expected for the sharp-lined B6 III primary: Night-to-night and possibly more rapid non-Keplerian radial-velocity variations occur. High-resolution observations of Si II lines reveal marked line-profile changes during single and successive nights. Preliminary evidence suggests that low-amplitude photometric variations may be present also. It is suggested that the primary is a member of the nonradially pulsating '53 Persei' class of variable stars.
Aikman Christopher L. G.
Hube Douglas P.
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