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Observations of active chromosphere stars
It is pointed out that spectroscopic signatures of stellar chromosphericactivity are readily observable. The present study is concerned with newphotometric and spectroscopic observations of active-chromosphere RSCVn, BY Dra, and FK Com stars. Attention is given to the first resultsof a synoptic monitoring program of many active chromosphere stars.During the time from 1980 to 1982, photometric and spectroscopicobservations of 10 known or suspected active-chromosphere objects weremade. The results regarding the individual stars are discussed. Sevenstars observed with the International Ultraviolet Explorer (IUE) are allspectroscopic binaries.
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Herkul |
| Sað Açýklýk: | 17h50m58.31s |
| Yükselim: | +19°14'42.3" |
| Görünürdeki Parlaklýk: | 8.718 |
| özdevim Sað Açýklýk: | -11.9 |
| özdevim Yükselim: | -28.2 |
| B-T magnitude: | 10.124 |
| V-T magnitude: | 8.835 |
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