Chromospherically active stars. II. HD 82558, a young single BY Draconis variable.
Fekel, F. C.; Simon, T.; Bopp, B. W.; Goodrich, B. D.; Africano, J. L.; Palmer, L. H.; Quingley, R.
United States, Canada
Abstract
It is presently noted that the HD 82558 chromospherically active star is a young and rapidly rotating K2 V single BY Draconis variable with very strong far-UV emission features and an H-alpha line filled to the continuum level by emission. HD 82558 has constant velocity and is not a member of the Hyades Supercluster. Its light curve behavior, which appears to have been stable for several hundred rotation cycles, is reminiscent of that of the young, rapidly rotating, single K V variable H II 1883 in the Pleiades; this stability may be characteristic of young, single, chromospherically active stars.