The Spatial Location of the Flaring Regions on AB Doradus

Details The Spatial Location of the Flaring Regions on AB Doradus The Spatial Location of the Flaring Regions on AB Doradus

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999hst..prop.8359w&link_type=abstract

HST Proposal ID #8359

Physics

Hst Proposal Id #8359 Cool Stars

Scientific paper

We request support to analyze 5 hours of GHRS spectra {600 individual spectra} of the C IV lines of the active K dwarf AB Doradus. These data {program 5310} were obtained immediately prior to our 14 hour GTO campaign {program 5181} on this star on 14 November 1994. AB Dor is the prototypical young, active star. Its atmosphere shows indications of domination by a large-scale global magnetic field. We propose to analyze this data set in conjunction with our GTO data and simultaneous photospheric doppler imaging, using tomographic techniques to identify the locations of the flaring regions, and to correlate them with the dark regions identified from optical spectroscopy and photometry. These data bear on the question of whether the large dark regions in active stars are solar- like magnetically-dominated spots, or are regions more like solar polar coronal holes. This investigation may lead to a better understanding of the nature of the stellar magnetic activity in the most active stars.

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