Long-term orbital period variations for EU hydrae
Long-term period variations of an Algol-type eclipsing binary star, EU Hydrae, are presented based on an analysis of its O - C curve. As in the cases of other Algols studied in recent papers by one of the authors (S.-B. Qian), an alternate period change has discovered to superimpose on a secular per...
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th-cmuir.6653943832-60092014-08-30T03:23:44Z Long-term orbital period variations for EU hydrae Qian S.-B. Boonrucksar S. Long-term period variations of an Algol-type eclipsing binary star, EU Hydrae, are presented based on an analysis of its O - C curve. As in the cases of other Algols studied in recent papers by one of the authors (S.-B. Qian), an alternate period change has discovered to superimpose on a secular period decrease (dP/dt = -4.8 × 10-8 dyr-1). By assuming that the alternate variation is cyclic, a period of 26.5 yr and an amplitude of 0.0104 d were determined. A long-term period decrease combined with a semi-detached configuration may indicate that EU Hya is undergoing a secular angular momentum loss. Three possible mechanisms are proposed to explain the alternate period change. 2014-08-30T03:23:44Z 2014-08-30T03:23:44Z 2003 Article 00046264 http://www.scopus.com/inward/record.url?eid=2-s2.0-30244467434&partnerID=40&md5=c31a187bb2c8192c853acb1624367985 http://cmuir.cmu.ac.th/handle/6653943832/6009 English |
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English |
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Long-term period variations of an Algol-type eclipsing binary star, EU Hydrae, are presented based on an analysis of its O - C curve. As in the cases of other Algols studied in recent papers by one of the authors (S.-B. Qian), an alternate period change has discovered to superimpose on a secular period decrease (dP/dt = -4.8 × 10-8 dyr-1). By assuming that the alternate variation is cyclic, a period of 26.5 yr and an amplitude of 0.0104 d were determined. A long-term period decrease combined with a semi-detached configuration may indicate that EU Hya is undergoing a secular angular momentum loss. Three possible mechanisms are proposed to explain the alternate period change. |
| format |
Article |
| author |
Qian S.-B. Boonrucksar S. |
| spellingShingle |
Qian S.-B. Boonrucksar S. Long-term orbital period variations for EU hydrae |
| author_facet |
Qian S.-B. Boonrucksar S. |
| author_sort |
Qian S.-B. |
| title |
Long-term orbital period variations for EU hydrae |
| title_short |
Long-term orbital period variations for EU hydrae |
| title_full |
Long-term orbital period variations for EU hydrae |
| title_fullStr |
Long-term orbital period variations for EU hydrae |
| title_full_unstemmed |
Long-term orbital period variations for EU hydrae |
| title_sort |
long-term orbital period variations for eu hydrae |
| publishDate |
2014 |
| url |
http://www.scopus.com/inward/record.url?eid=2-s2.0-30244467434&partnerID=40&md5=c31a187bb2c8192c853acb1624367985 http://cmuir.cmu.ac.th/handle/6653943832/6009 |
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1681420533162311680 |