The extraordinary early-type eclipsing binary HR 2680

Details The extraordinary early-type eclipsing binary HR 2680 The extraordinary early-type eclipsing binary HR 2680

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.261....1b&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 261, no. 1, p. 1-10.

Astronomy and Astrophysics

Astronomy

5

Eclipsing Binary Stars, Light Curve, Orbital Elements, Stellar Oscillations, Stellar Spectrophotometry, Periodic Variations, Tables (Data), Variable Stars

Scientific paper

Photometric observations of the HR 2680 (B5V) star using Stromgren-b and Stromgren-uvby filters carried out in 1990 and 1991 are reported. It is found that this star is a single-line spectroscopic binary showing partial or annular eclipses with a period of 8.1 d. A light variation with an amplitude of 0.03 mag can be seen outside eclipse which can be interpreted as two oscillations, with approximate periods of about 1.19 and 1.28 d, but the periods are not constant. It is suggested that the star is a member of the 53 Per class of line-profile variables. The extraordinary variability of HR 2680 outside eclipse makes this star unique. It is suggested that the star could be used as a test bed for stellar dynamics and nonradial pulsations.

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