A spectroscopic study of AR Lacertae

Details A spectroscopic study of AR Lacertae A spectroscopic study of AR Lacertae

Sep 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...216..508n&link_type=abstract

Astrophysical Journal, Part 1, vol. 216, Sept. 1, 1977, p. 508-516.

Astronomy and Astrophysics

Astrophysics

40

Abundance, Balmer Series, Eclipsing Binary Stars, H Alpha Line, Stellar Spectra, Astronomical Spectroscopy, Atomic Spectra, Chromosphere, Emission Spectra, Iron, Stellar Atmospheres

Scientific paper

Several spectra of the double-subgiant binary system AR Lac obtained both during and outside of primary eclipse are examined. It is found that a disk (or shell) exists around the secondary star. The secondary star shows evidence of a high level of chromospheric activity, which produces strong Ca II H and K emissions. The secondary is moderately underabundant in most metals, while the primary has solar-type abundances. These results are discussed in the context of the peculiarities seen in AR Lac itself and in the RS Canum Venaticorum binaries.

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