The enigmatic star EZ Pegasi - A mystery solved?

Details The enigmatic star EZ Pegasi - A mystery solved? The enigmatic star EZ Pegasi - A mystery solved?

Jan 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985pasp...97...72h&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 97, Jan. 1985, p. 72-77.

Astronomy and Astrophysics

Astronomy

7

Binary Stars, G Stars, Metallicity, Stellar Magnitude, Stellar Spectra, Variable Stars, Chromosphere, H Lines, Irregular Variable Stars, K Lines, Stellar Spectrophotometry

Scientific paper

EZ Peg, a ninth-magnitude G star that has been classified by various authors as an irregular variable, a U Gem system, and a contact binary is shown to have all the spectroscopic and photometric characteristics of an active-chromosphere RS CVn binary. The authors suggest that the reported "outburst" of 1943, when the spectrum appeared to be that of a B star, never occurred. The strong Ca II H and K reversals, viewed with low spectral resolution, caused the photospheric Ca II absorption to appear abnormally weak, mimicking a much earlier spectral type.

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