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On the rarity of FK COM stars
Very high-dispersion spectra (2.5 A/mm) were obtained of 31 southernlate-type stars, predominantly early G giants, in an effort to find newrapidly rotating, active stars which would be FK Com-like. Measurementsof linewidths and the strength of chromospheric Ca II K-line emissionare presented, but no new star could be added to the class of 'rapidrotators'. Space densities and evolutionary lifetimes for FK Com starsare discussed.
| The impact of IUE on binary star studies
The use of IUE observations in the investigation of binary stars isdiscussed. The results of data analysis of several classes of binarysystems are briefly reviewed including zeta Aurigae and VV Cephei stars,mu Sagittarii, epsilon Aurigae, beta Lyrae and the W Serpentis stars,symbiotic stars, and the Algols.
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Ucan Balik |
| Sað Açýklýk: | 07h01m46.03s |
| Yükselim: | -70°33'59.1" |
| Görünürdeki Parlaklýk: | 8.198 |
| Uzaklýk: | 369.004 parsek |
| özdevim Sað Açýklýk: | -12.8 |
| özdevim Yükselim: | 3.5 |
| B-T magnitude: | 9.305 |
| V-T magnitude: | 8.29 |
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