Short-period light variations in Be stars

Details Short-period light variations in Be stars Short-period light variations in Be stars

Jan 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981aj.....86...53p&link_type=abstract

Astronomical Journal, vol. 86, Jan. 1981, p. 53-61.

Other

49

B Stars, Light (Visible Radiation), Periodic Variations, Stellar Radiation, Stellar Spectrophotometry, Binary Stars, H Lines, Stellar Rotation, Stellar Winds, Variable Stars

Scientific paper

Observations of variability on time scales less than a day in the brightness of Be stars are discussed. Following a review of previous observations of photometric variability in Be stars, new observations of individual stars made with an 0.6-m reflector using a Stromgren b filter, an 0.4-m reflector with Johnson UBV filters and an 0.4-m reflector with Stromgren v, b and y filters are presented. Short-period light variations of 0.02 to 0.1 magnitude are noted in almost all of the 16 stars observed, with a consistent quasi-periodicity ranging from 0.25 to 0.8 days. The variability in color, on the other hand, is observed to be small, based on limited information. It is pointed out that the range of quasi-periods observed appears to rule out pulsation or rotation as the sole mechanism for the variability.

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