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South galactic CAP G and K stars with infrared excesses
Near-infrared and IRAS photometry is discussed for 13 G and K stars inthe south galactic cap. Five of them show a strong flux excess at 12microns as would be expected from dust shells emitting at temperaturesof several hundred Kelvin. One of them (XY Tau) has previously beenclassified as a 206-d Mira, but the new observations suggest it isactually a variable F or G star. The most likely explanation is that theoriginal classification was wrong and that it is in fact apremain-sequence star. The other four stars are either in very unusualevolutionary states or they are binary systems. The presence oflong-term variations in the near-infrared flux of the flare star CC Eriis reported. The colors are redder when the star is fainter, and thevariations might be associated with the star spot cycle.
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Saat |
| Sað Açýklýk: | 03h25m24.94s |
| Yükselim: | -52°22'53.9" |
| Görünürdeki Parlaklýk: | 7.802 |
| Uzaklýk: | 358.423 parsek |
| özdevim Sað Açýklýk: | 14.7 |
| özdevim Yükselim: | 15.1 |
| B-T magnitude: | 9.394 |
| V-T magnitude: | 7.934 |
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INHABITED SKY
