תוכן
תמונות
הוסף תמונה שלך
DSS Images Other Images
מאמרים קשורים
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.
|
הכנס מאמר חדש
לינקים קשורים
הכנס לינק חדש
משמש של הקבוצה הבאה
|
תצפית ומידע אסטרומטרי
| קבוצת-כוכבים: | שעון |
| התרוממות ימנית: | 03h25m24.94s |
| סירוב: | -52°22'53.9" |
| גודל גלוי: | 7.802 |
| מרחק: | 358.423 פארסק |
| תנועה נכונה: | 14.7 |
| תנועה נכונה: | 15.1 |
| B-T magnitude: | 9.394 |
| V-T magnitude: | 7.934 |
קטלוגים וכינוים:
|
