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 תמונותהוסף תמונה שלך
 DSS Images   Other Images
 
 
 
 מאמרים קשורים
הכנס מאמר חדש| Coronal activity in F-, G-, and K-type stars. II - Coronal structure and rotation Einstein Observatory soft X-ray spectra for a sample of 34 late-typestars are analyzed in order to determine coronal temperatures andemission features per unit area at the stellar surface. No obviousrelation between coronal temperature and (B-V) color index could befound. Coronal temperature is dependent on stellar luminosity class. Thedata are discussed in terms of a model for static magnetic loops, andindications are found for a variety of coronae in which the sizes of thedominating loops range from more compact than loops in solar-activeregions to loops that are comparable to the pressure scale height (oreven greater). Despite observed structural differences, a single, strictrelation holds between X-ray surface flux density and the Ca II H + Kexcess flux density of these stars. Coronal activity and structure arenoted to be related to the stellar rotation rate.
 
 
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 לינקים קשוריםהכנס לינק חדש
 
 
 משמש של הקבוצה הבאה | 
 
 תצפית ומידע אסטרומטרי
| קבוצת-כוכבים: | לויתן |  | התרוממות ימנית: | 01h52m38.36s |  | סירוב: | +02°29'53.8" |  | גודל גלוי: | 7.529 |  | מרחק: | 202.429 פארסק |  | תנועה נכונה: | 67.6 |  | תנועה נכונה: | -16 |  | B-T magnitude: | 8.744 |  | V-T magnitude: | 7.63 |  קטלוגים וכינוים:
 
 
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