Calcium H and K emission in AR Lacertae

Details Calcium H and K emission in AR Lacertae Calcium H and K emission in AR Lacertae

May 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981aj.....86..766n&link_type=abstract

Astronomical Journal, vol. 86, May 1981, p. 766-770.

Astronomy and Astrophysics

Astronomy

5

Calcium, Eclipsing Binary Stars, Emission Spectra, H Lines, K Lines, Stellar Spectra, Dwarf Stars, Line Spectra, Stellar Spectrophotometry, Subgiant Stars, Variable Stars

Scientific paper

The behavior of the Ca II H and K emission lines as seen on 64 high-quality spectra of the RS CVn-type binary star AR Lac is investigated. Evidence is found for rapid (hourly) variability in both the emission strength and line profiles. Although a number of unusual events were observed, there appears to be no correlation between the emission intensity and orbital phase of the system or between the emission strength and the migrating photometric wave phenomena.

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