Stellar activity in the short period subgroup of the RS CVn systems

Details Stellar activity in the short period subgroup of the RS CVn systems Stellar activity in the short period subgroup of the RS CVn systems

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982esasp.176..169b&link_type=abstract

In ESA 3rd European IUE Conf. p 169-173 (SEE N83-11889 02-88)

Physics

6

Binary Stars, Magnesium, Solar Activity, Stellar Radiation, Stellar Rotation, Emission Spectra, Iue, Light Curve, Photosphere, Stellar Spectrophotometry

Scientific paper

The MgII 2800 A feature was studied in several spectrograms, obtained with IUE, for selected binaries among the RS CVn systems. The surface flux in emission was used as a measure of activity and its relevance is shown for the short period subgroup of the RS CVn like stars. Although the sample size is low, indications of correlation between such activity and rotational velocity as well as the scale of irregular photometric distortions are presented. All the systems show filling of the MgII feature between 2770 and 2818A with respect to the Sun. Results indicate activity at least 10 times that of the Sun. This is attributed to rotationally induced enhancement of emission.

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