The fastest unbound star in our Galaxy ejected by a thermonuclear supernova
文献类型：期刊论文
| 作者 | Geier, S1,2; Furst, F3; Ziegerer, E2; Kupfer, T4; Heber, U2; Irrgang, A2; Wang B(王博)5 ; Liu ZW(柳正伟)5,6; Han ZW(韩占文)5; Sesar, B7,8
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| 刊名 | SCIENCE
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| 出版日期 | 2015-03-06 |
| 卷号 | 347期号:6226页码:1126-1128 |
| ISSN号 | 0036-8075 |
| 产权排序 | 第五完成单位 |
| 通讯作者 | Geier, S (reprint author), European So Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany. |
| 英文摘要 | Hypervelocity stars (HVSs) travel with velocities so high that they exceed the escape velocity of the Galaxy. Several acceleration mechanisms have been discussed. Only one HVS (US 708, HVS 2) is a compact helium star. Here we present a spectroscopic and kinematic analysis of US 708. Traveling with a velocity of similar to 1200 kilometers per second, it is the fastest unbound star in our Galaxy. In reconstructing its trajectory, the Galactic center becomes very unlikely as an origin, which is hardly consistent with the most favored ejection mechanism for the other HVSs. Furthermore, we detected that US 708 is a fast rotator. According to our binary evolution model, it was spun-up by tidal interaction in a close binary and is likely to be the ejected donor remnant of a thermonuclear supernova. |
| WOS标题词 | Science & Technology |
| 学科主题 | Science & Technology - Other Topics |
| 类目[WOS] | Multidisciplinary Sciences |
| 研究领域[WOS] | Science & Technology - Other Topics |
| 关键词[WOS] | SUBDWARF-B-STARS ; SINGLE-DEGENERATE SCENARIO ; HYPERVELOCITY STARS ; IA SUPERNOVAE ; ROTATIONAL PROPERTIES ; GALACTIC HALO ; WHITE-DWARFS ; BLACK-HOLES ; BINARY ; PROGENITORS |
| 收录类别 | SCI ; EI |
| 原文出处 | http://www.sciencemag.org/content/347/6226/1126 |
| 语种 | 英语 |
| WOS记录号 | WOS:000350354200049 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/4600]  |
| 专题 | 云南天文台_大样本恒星演化研究组 云南天文台_中国科学院天体结构与演化重点实验室 |
| 作者单位 | 1.European Southern Observatory, Karl-Schwarzschild-Straße 2, 85748 Garching, Germany 2.Dr. Karl Remeis-Observatory and Erlangen Centre for Astroparticle Physics, Astronomical Institute, Friedrich-Alexander University Erlangen-Nuremberg, Sternwartstraße 7, 96049 Bamberg, Germany 3.Space Radiation Lab, MC 290-17 Cahill, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, USA 4.Department of Astrophysics/Institute for Mathematics, Astrophysics and Particle Physics, Radboud University Nijmegen, P.O. Box 9010, 6500 GL Nijmegen, Netherlands 5.Key Laboratory of the Structure and Evolution of Celestial Objects, Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China 6.Argelander-Institut für Astronomie, Universität Bonn, Auf dem Hügel 71, 53121 Bonn, Germany 7.Division of Physics, Mathematics, and Astronomy, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, USA 8.Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany 9.Astrophysics Research Center, School of Mathematics and Physics, Queen’s University Belfast, Belfast BT7 1NN, UK 10.Institute for Astronomy, University of Hawaii at Manoa, Honolulu, HI 96822, USA |
| 推荐引用方式 GB/T 7714 | Geier, S,Furst, F,Ziegerer, E,et al. The fastest unbound star in our Galaxy ejected by a thermonuclear supernova[J]. SCIENCE,2015,347(6226):1126-1128. |
| APA | Geier, S.,Furst, F.,Ziegerer, E.,Kupfer, T.,Heber, U.,...&Waters, C.(2015).The fastest unbound star in our Galaxy ejected by a thermonuclear supernova.SCIENCE,347(6226),1126-1128. |
| MLA | Geier, S,et al."The fastest unbound star in our Galaxy ejected by a thermonuclear supernova".SCIENCE 347.6226(2015):1126-1128. |
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来源：云南天文台
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