Optical Flares on the RS CVn-type Binary II Pegasi

Details Optical Flares on the RS CVn-type Binary II Pegasi Optical Flares on the RS CVn-type Binary II Pegasi

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003csss...12..986g&link_type=abstract

The Future of Cool-Star Astrophysics: 12th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun (2001 July 30 - August

Astronomy and Astrophysics

Astrophysics

Ii Peg, Flare, Chromospheric Activity

Scientific paper

The new high-resolution echelle spectra of II Peg obtained in Dec. 1999, Feb. 2000, Sep. 2000 using 2.16m telescope at Beijing Astronomical Observatory, are analyzed here. By means of spectral subtraction technique, the chromospheric contribution in several chromospheric activity indicators (Hα , HeI D3, and CaII IRT) has been determined. Three optical flares with HeI D3 emission are detected during these three observing runs. The intensity of these flares is discussed. Orbital phase modulation of the chromospheric activity indicators is derived.

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