Spectral Observations of the Flare Star HU Del

Details Spectral Observations of the Flare Star HU Del Spectral Observations of the Flare Star HU Del

Jul 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005ap.....48..279t&link_type=abstract

Astrophysics, Volume 48, Issue 3, pp.279-290

Astronomy and Astrophysics

Astrophysics

2

Stars, Flare, Individual, Hu Del, Stars - Flare - Individual - Hu Del

Scientific paper

Results are presented from a study of 27 spectra of the flare star HU Del obtained during 2000-2002 on the 2.6 meter telescope at the Byurakan Observatory. Two flares were detected, along with a weak correlation between the equivalent widths of the Hα and Hβ emission lines. At the time of the photometric maximum of a flare the equivalent widths of both these lines are minimal and reach their maximum only significantly afterward. A strong increase in the Hβ line intensity is observed which appears to be the consequence of a photometrically undetected, short-duration flare. A possible relationship between the binary (multiple) character and the physical activity of this star is examined briefly in terms of current theoretical models.

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