YY Geminorum: A very late type close binary with possible magnetic stellar wind
The O-C curve of the very late type close binary (dM1e + dM1e) YY Geminorum is formed and analyzed based on all available times of minimum light. It is found that the orbital period shows a secular decrease with rate dP/dt = -1.08 × 10-8 days yr-1. There is weak evidence indicating that a small-ampl...
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th-cmuir.6653943832-56202014-08-30T02:56:44Z YY Geminorum: A very late type close binary with possible magnetic stellar wind Qian S. Liu D. Tan W. Soonthornthum B. The O-C curve of the very late type close binary (dM1e + dM1e) YY Geminorum is formed and analyzed based on all available times of minimum light. It is found that the orbital period shows a secular decrease with rate dP/dt = -1.08 × 10-8 days yr-1. There is weak evidence indicating that a small-amplitude period oscillation is superposed on the period decrease. YY Gem is a well-detached eclipsing binary containing two very active components. The secular period decrease may suggest that the system is undergoing secular mass and angular momentum loss via a magnetic stellar wind. If the small-amplitude oscillation is real, it can be explained either by magnetic activity cycles or by the presence of a giant planet or brown dwarf. 2014-08-30T02:56:44Z 2014-08-30T02:56:44Z 2002 Article 00046256 10.1086/339832 http://www.scopus.com/inward/record.url?eid=2-s2.0-0041522325&partnerID=40&md5=8bf40ee6cbcc66176037208412b6c4b6 http://cmuir.cmu.ac.th/handle/6653943832/5620 English |
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English |
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The O-C curve of the very late type close binary (dM1e + dM1e) YY Geminorum is formed and analyzed based on all available times of minimum light. It is found that the orbital period shows a secular decrease with rate dP/dt = -1.08 × 10-8 days yr-1. There is weak evidence indicating that a small-amplitude period oscillation is superposed on the period decrease. YY Gem is a well-detached eclipsing binary containing two very active components. The secular period decrease may suggest that the system is undergoing secular mass and angular momentum loss via a magnetic stellar wind. If the small-amplitude oscillation is real, it can be explained either by magnetic activity cycles or by the presence of a giant planet or brown dwarf. |
| format |
Article |
| author |
Qian S. Liu D. Tan W. Soonthornthum B. |
| spellingShingle |
Qian S. Liu D. Tan W. Soonthornthum B. YY Geminorum: A very late type close binary with possible magnetic stellar wind |
| author_facet |
Qian S. Liu D. Tan W. Soonthornthum B. |
| author_sort |
Qian S. |
| title |
YY Geminorum: A very late type close binary with possible magnetic stellar wind |
| title_short |
YY Geminorum: A very late type close binary with possible magnetic stellar wind |
| title_full |
YY Geminorum: A very late type close binary with possible magnetic stellar wind |
| title_fullStr |
YY Geminorum: A very late type close binary with possible magnetic stellar wind |
| title_full_unstemmed |
YY Geminorum: A very late type close binary with possible magnetic stellar wind |
| title_sort |
yy geminorum: a very late type close binary with possible magnetic stellar wind |
| publishDate |
2014 |
| url |
http://www.scopus.com/inward/record.url?eid=2-s2.0-0041522325&partnerID=40&md5=8bf40ee6cbcc66176037208412b6c4b6 http://cmuir.cmu.ac.th/handle/6653943832/5620 |
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1681420459951783936 |