Astronomy and Astrophysics – Astronomy
Scientific paper
May 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...215...79n&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 215, no. 1, May 1989, p. 79-91. Research supported by CNR, Agenzia Spaziale It
Astronomy and Astrophysics
Astronomy
68
Binary Stars, Stellar Atmospheres, Stellar Flares, Ultraviolet Astronomy, Chromosphere, High Resolution, K Stars, Red Shift, Stellar Rotation
Scientific paper
High-resolution IUE SWP and LWP spectra of the bright eclipsing RS CVn system AR Lac, obtained during 40 h of continuous observations on September 18-19, 1985, are compiled and used to derive chromosphere images. The data and results are presented graphically and discussed in detail. The K 0 IV star is found to have a globally brighter trailing hemisphere and at least three distinct plage regions; the G 2 IV star has a flaring region with significant redshift and line-emission broadening and exhibits factor-of-3 variability in total emission, attributed to the presence of a large chromospherically inactive region.
Linsky Jeffrey L.
Neff James E.
Rodono' Marcello
Walter Fred M.
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