DISCOVERY OF AN X-RAY-EMITTING CONTACT BINARY SYSTEM 2MASS J11201034-2201340
文献类型:期刊论文
作者 | Hu, Chin-Ping1,2; Yang, Ting-Chang2; Chou, Yi2; Liu L(刘亮)3; Qian SB(钱声帮)3; Hui, C. Y.4; Kong, Albert K. H.5; Lin, L. C. C.6; Tam, P. H. T.7; Li, K. L.8 |
刊名 | ASTRONOMICAL JOURNAL |
出版日期 | 2016-06-01 |
卷号 | 151期号:6 |
ISSN号 | 0004-6256 |
关键词 | binaries: close binaries: eclipsing stars: individual (2MASS J11201034-2201340) X-rays: stars |
通讯作者 | Hu, CP |
产权排序 | 第三完成单位 |
英文摘要 | We report the detection of orbital modulation, a model solution, and the X-ray properties of a newly discovered contact binary, Two Micron All Sky Survey (2MASS) J11201034-2201340. We serendipitously found this X-ray point source outside the error ellipse when searching for possible X-ray counterparts of 7-ray millisecond pulsars among the unidentified objects detected by the Fermi Gamma-ray Space Telescope. The optical counterpart of the X-ray source (unrelated to the 7-ray source) was then identified using archival databases. The long-term Catalina Real-Time Transient Survey detected a precise signal with a period of P = 0.28876208 (56) days. A follow-up observation made by the Super Light Telescope of Lulin Observatory revealed the binary nature of the object. Utilizing archived photometric data of multi-band surveys, we construct the spectral energy distribution (SED), which is well fit by a K2V spectral template. The fitting result of the orbital profile using the Wilson Devinney code suggests that 2MASS J11201034-2201340 is a short-period A-type contact binary and the more massive component has a cool spot. The X-ray emission was first noted in observations made by Swift, and then further confirmed and characterized by an XMM-Newton observation. The X-ray spectrum can be described by a power law or thermal Bremsstrahlung. Unfortunately, we could not observe significant X-ray orbital modulation. Finally, according to the SED, this system is estimated to be 690 pc from Earth with a calculated X-ray intensity of (0.7 - 1.5) x 10(30) erg s(-1), which is in the expected range of an X-ray emitting contact binary. |
学科主题 | Astronomy & Astrophysics |
WOS标题词 | Science & Technology ; Physical Sciences |
类目[WOS] | Astronomy & Astrophysics |
研究领域[WOS] | Astronomy & Astrophysics |
关键词[WOS] | LIGHT CURVES ; STAR LIGHT ; VW-CEPHEI ; TIME-SERIES ; SKY SURVEY ; CATALOG |
收录类别 | SCI |
原文出处 | http://iopscience.iop.org/article/10.3847/0004-6256/151/6/170/meta |
语种 | 英语 |
WOS记录号 | WOS:000377990300037 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/9614] |
专题 | 云南天文台_双星与变星研究组 |
作者单位 | 1.Department of Physics, University of Hong Kong, Pokfulam Road, Hong Kong 2.Graduate Institute of Astronomy, National Central University, Jhongli 32001, Taiwan 3.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China 4.Department of Astronomy and Space Science, Chungnam National University, Daejeon, Korea 5.Institute of Astronomy and Department of Physics, National Tsing Hua University, Hsinchu, Taiwan 6.Institute of Astronomy and Astrophysics, Academia Sinica, Taiwan 7.Institute of Astronomy and Space Science, Sun Yat-Sen University, Guangzhou 510275, China 8.Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824-2320, USA |
推荐引用方式 GB/T 7714 | Hu, Chin-Ping,Yang, Ting-Chang,Chou, Yi,et al. DISCOVERY OF AN X-RAY-EMITTING CONTACT BINARY SYSTEM 2MASS J11201034-2201340[J]. ASTRONOMICAL JOURNAL,2016,151(6). |
APA | Hu, Chin-Ping.,Yang, Ting-Chang.,Chou, Yi.,Liu L.,Qian SB.,...&Ip, Wing-Huen.(2016).DISCOVERY OF AN X-RAY-EMITTING CONTACT BINARY SYSTEM 2MASS J11201034-2201340.ASTRONOMICAL JOURNAL,151(6). |
MLA | Hu, Chin-Ping,et al."DISCOVERY OF AN X-RAY-EMITTING CONTACT BINARY SYSTEM 2MASS J11201034-2201340".ASTRONOMICAL JOURNAL 151.6(2016). |
入库方式: OAI收割
来源:云南天文台
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