Period studies and photometric models for two EB-type binaries EU Hya and AW Vul
文献类型：期刊论文
| 作者 | Yang Yuangui1; Li Qun1; Li Huali2; Dai Haifeng1 |
| 刊名 | Research in Astronomy and Astrophysics
 |
| 出版日期 | 2016 |
| 卷号 | 16期号:2页码:35 |
| ISSN号 | 1674-4527 |
| 英文摘要 | New photometry for two Algol-type binaries, EU Hya (P = 0.7782 d) and AW Vul (P = 0.8065 d), was carried out using the 60-cm telescope at Xinglong station of National Astronomical Observatories, Chinese Academy of Sciences. With the updated Wilson-Devinney code, photometric elements were derived from the multi-color light curves. The modeled results indicate that the two systems are near-contact binaries, whose secondary components fill their Roche lobes. The fill-out factors of the primaries are f_p = 81.2 (±0.2)% for EU Hya and f_p = 82.4 (±0.3)%for AWVul. Period analysis implies that there exists a downward parabola with a light-time orbit from the (O –C) curve. This kind of periodic oscillation may be attributed to the light-time orbit effect of a third companion. The long-term period decrease may be caused by mass and angular momentum loss. When the orbital period decreases, the fill-out factor of f_p will increase. Our results indicate that the primaries will also eventually fill their Roche lobes. EU Hya and AW Vul may possibly evolve from semi-detached binaries into contact ones. |
| 语种 | 英语 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/48492]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.淮北师范大学信息学院 2.中国科学院国家天文台 |
| 推荐引用方式 GB/T 7714 | Yang Yuangui,Li Qun,Li Huali,et al. Period studies and photometric models for two EB-type binaries EU Hya and AW Vul[J]. Research in Astronomy and Astrophysics,2016,16(2):35. |
| APA | Yang Yuangui,Li Qun,Li Huali,&Dai Haifeng.(2016).Period studies and photometric models for two EB-type binaries EU Hya and AW Vul.Research in Astronomy and Astrophysics,16(2),35. |
| MLA | Yang Yuangui,et al."Period studies and photometric models for two EB-type binaries EU Hya and AW Vul".Research in Astronomy and Astrophysics 16.2(2016):35. |
入库方式： OAI收割
来源：国家天文台
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