POSTER PAPER 7.09
The Optical Flares on the RS CVn-type Binary II Pegasi
Shenghong Gu and Huisong Tan
Institute: Yunnan Observatory, Chinese Academy of Sciences, Kunming, Yunnan Province, The People's Republic of China
Institute: National Astronomical Observatories, Chinese Academy of Sciences, The People's Republic of China
Institute: The united laboratory for optical astronomy, Chinese Academy of Sciences, The People's Republic of China
Contact Email: gus2000@263.net
Abstract:
The new high-resolution echelle spectra of II Peg obtained in Dec. 1999,
Feb. 2000, Sep. 2000 using 2.16 m telescope at Beijing Astronomical Observatory, are
analyzed here. By means of spectral subtraction technique, the chromospheric
contribution in several chromospheric activity indicators Ha 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 three flares is
discussed. Orbital phase modulation of the chromospheric activity
indicators is derived.
Index Keywords: II Peg; Flare; Chromospheric Activity
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Manuscript submitted: 2001-Sep-02
"The Future of Cool-Star Astrophysics", 2003, Eds. A. Brown,
G. M. Harper, & T. R. Ayres.
Proceedings of 12th Cambridge Workshop on Cool Stars, Stellar Systems,
& The Sun,
© 2003 University of Colorado.