Long-term and orbital variability of the optical spectrum of HDE 245770 = A 0535 + 26

Details Long-term and orbital variability of the optical spectrum of HDE 245770 = A 0535 + 26 Long-term and orbital variability of the optical spectrum of HDE 245770 = A 0535 + 26

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985azh....62..339a&link_type=abstract

(Astronomicheskii Zhurnal, vol. 62, Mar.-Apr. 1985, p. 339-347) Soviet Astronomy (ISSN 0038-5301), vol. 29, Mar.-Apr. 1985, p. 1

Astronomy and Astrophysics

Astronomy

2

B Stars, Stellar Envelopes, Stellar Luminosity, Stellar Magnitude, Stellar Spectra, X Ray Sources, H Alpha Line, H Beta Line, H Gamma Line, Stellar Flares, Variable Stars, Visible Spectrum

Scientific paper

Further results of investigation of the Be star HDE 245770 are presented. Strengthening of absorption and emission lines by 40 - 50 per cent in January 1981 is noted. Connection of this with the X-ray flare is discussed. The presence of periodicity with P = 34d.5 in the intensity of the emission line Hβ is shown. The spectral class Sp = O9.90±0.10 of the star and the absolute magnitude Mv = 5m.8 are determined. The dimensions of the envelope in the lines Hβ (r = 1.5 R*) and Hα (r = 5 R*) are estimated.

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