Photometric investigation and rapid periodicity of RR Tau

Details Photometric investigation and rapid periodicity of RR Tau Photometric investigation and rapid periodicity of RR Tau

Jan 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979afz....15...75z&link_type=abstract

(Astrofizika, vol. 15, Jan.-Mar. 1979, p. 75-84.) Astrophysics, vol. 15, no. 1, July 1979, p. 48-54. Translation.

Astronomy and Astrophysics

Astrophysics

2

Astronomical Photometry, B Stars, Variable Stars, Astronomical Photography, Light Curve, Periodic Variations, Ubv Spectra, Visual Photometry, X Ray Sources

Scientific paper

Results are given for photoelectric UBV, photographic B, and infrared RJHK observations of the variable Be star RR Tau, which is 8 arcmin from the transient X-ray source A0535+26. The total amplitude of the variability of the star in the period 1967-1978 reaches 4 mag. The changes in the color indices are appreciable (0.3-0.6 mag), but are not correlated with the brightness, although, on the average, the star is somewhat bluer at maximum light. Photometry in the U filter with a time resolution of 10 sec revealed the presence of a rapid (of the order of one minute) variability of the star with amplitude of about 10%. The rapid variability contains a periodic component with amplitude 2% and P = 47 sec, which is close to one of the harmonics (46 sec) of the X-ray pulsar.

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