U, B, V photometry and spectroscopy of HM Sagittae in 1977

Details U, B, V photometry and spectroscopy of HM Sagittae in 1977 U, B, V photometry and spectroscopy of HM Sagittae in 1977

Oct 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978sval....4..219b&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 4, Sept.-Oct. 1978, p. 406-410.) Soviet Astronomy Letters, vol. 4, Sept.-Oct. 1978, p.

Astronomy and Astrophysics

Astronomy

5

Flare Stars, Stellar Spectrophotometry, Ubv Spectra, Line Spectra, Spectrum Analysis, Stellar Spectra, Stellar Winds, Wolf-Rayet Stars

Scientific paper

Against the background of its smooth brightness variations, the peculiar object HM Sge displays rapid flares with a characteristic time of several days and an amplitude up to 0.4 mag. During these short flares the color indices of the star remain practically constant. The H-alpha emission-line profile exhibits an asymmetric central peak and broad wings. Possible similarities between HM Sge and Wolf-Rayet stars, planetary nebulae, and the peculiar object V1016 Cygni are discussed briefly.

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