תוכן
תמונות
הוסף תמונה שלך
DSS Images Other Images
מאמרים קשורים
The orbital period study and photometric analysis of XY Ursae Majoris
Photoelectric observations of the eclipsing binary XY UMa have beencarried out in B and V colours at the Ege University Observatory.Combining these newly obtained data with the previous ones available inthe literature, the problem pertaining to the orbital period of thesystem has been investigated through a detailed description of the O-Cdiagram. The sinusoidal and secular changes have been found. Suchvariations of the orbital period have been examined in terms of threeplausible mechanisms, namely (i) a light-time effect due to a thirdbody, (ii) the orbital period modulation due to magnetic activity cycleof a component star, and (iii) a mass loss case in which the ejectedmaterial escapes out from the binary system. A combination of a magneticactivity cycle mechanism and a mass loss case is found to reproducesatisfactorily the period changes. Further, the observed photoelectriclight curves of the system have been analyzed with the Wilson-Devinneyapproach. This analysis shows that the asymmetries of the light curvesof XY UMa can be interpreted in terms of cool star-spot covering 7% ofthe stellar photosphere of the primary component of this binary. Thesystem is found to be a beta Lyrae type detached binary. The absoluteelements of the system are also deduced.
| Photoelectric Light Curves and Minimum Times of XY UMa
Not Available
|
הכנס מאמר חדש
לינקים קשורים
הכנס לינק חדש
משמש של הקבוצה הבאה
|
תצפית ומידע אסטרומטרי
קטלוגים וכינוים:
|
