The H_beta and H_gamma Lines in the Spectrum of V1057 Cyg

Details The H_beta and H_gamma Lines in the Spectrum of V1057 Cyg The H_beta and H_gamma Lines in the Spectrum of V1057 Cyg

Jan 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001astl...27...34r&link_type=abstract

Astronomy Letters, vol. 27, p. 34-38 (2001)

Astronomy and Astrophysics

Astronomy

2

Variable And Peculiar Stars

Scientific paper

We present the equivalent widths of the H_beta and H_gamma absorption lines in the spectrum of V1057 Cyg measured from 1978-1990 spectrograms. The mean equivalent widths of these lines decreased approximately twofold during 1978-1985 and somewhat increased during 1987-1990. Using published UBV photometry, we show that there has been a correlation between the H_beta equivalent width and the color since 1983, with increasing with decreasing . Based on our spectroscopic and photometric observations in 1978-1990, we assume that V1057 Cyg has passed to a qualitatively new stage of its development after 1985.

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