Evidence of Chromospheric Activity on HR 1099 |
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| Authors: | Young Woon Kang Kyu Dong Oh |
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| Institution: | (1) Dept. of Earth Sciences, Sejong University, Seoul, 143-747, Korea; E-mail;(2) Department of Earth Science, Chonnam National University, Kwangju, 500-757, Korea; E-mail |
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| Abstract: | We present an observational evidence of the chromospheric activity on HR1099. The IUE spectra of HR 1099 were used for the
ultraviolet photometry and for the intensity variation of chromospheric emission line. Ultraviolet light curves were made
from the low and high dispersion IUE spectra and were compared with a optical light curve. We have analyzed the ultraviolet
and optical light curves by the Wilson and Devinney computing code including dark spots. The intensity variation of Mg II
emission line depends on the orbital phase. The maximum intensity of Mg II emission line occurs at the phase of light minimum
where dark spot visibility is maximum due to strong chromospheric activity.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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