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Title:
Period analysis of the semi-detached binary V505 Sgr.
Authors:
Qian, Shengbang; Liu, Qingyao; Yang, Yulang
Publication:
Publ. Yunnan Obs., No. 4, p. 1 - 7
Publication Date:
00/1998
Origin:
ARI
ARI Keywords:
Algol Systems: Period Changes
Bibliographic Code:
1998PYunO...4....1Q

Abstract

The O-C curve of the Algol-type semi-detached binary V505 Sgr has been analyzed using a new method proposed by Kalimeris et al. (1994). It is shown that the orbital period oscillates with an amplitude of 0.453×10-5days and a period of aobut 41.5 years that differs from the previous period of 105 years. The physical mechanisms explaining the orbital period behaviour have been studied. It is indicated that the present period change may not be caused by the existence of the third body proposed previously. The presence of a fourth body with mass 0.013 Msun and orbit semimajor axis 17.35 AU or the magnetic activity cycle of the secondary component may be used to explain the present period change.
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Database: Astronomy
Physics
arXiv e-prints