Optical Modulation in the X-Ray Binary 4U 1543-624 Revisited
文献类型：期刊论文
| 作者 | Wang, Z.1 ; Tziamtzis, A.1; Kaplan, D. L.2; Chakrabarty, D.3
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| 刊名 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA
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| 出版日期 | 2015-10-07 |
| 卷号 | 32期号:2页码:1 |
| 关键词 | binaries: close stars: individual (4U 1543-624) stars: low-mass stars: neutron X-rays: binaries |
| 英文摘要 | The X-ray binary 4U 1543-624 has been provisionally identified as an ultra-compact system with an orbital period of similar or equal to 18 min. We have carried out time-resolved optical imaging of the binary to verify the ultra-short orbital period. Using 140 min of high-cadence r '-band photometry, we recover the previously-seen sinusoidal modulation and determine a period P = 18.20 +/- 0.09 min. In addition, we also see a 7.0x10(-4) mag min(-1) linear decay, likely related to variations in the source's accretion activity. Assuming that the sinusoidal modulation arises from X-ray heating of the inner face of the companion star, we estimate a distance of 6.0-6.7 kpc and an inclination angle of 34 degrees-61 degrees (90% confidence) for the binary. Given the stability of the modulation, we can confirm that the modulation is orbital in origin and 4U 1543-624 is an ultra-compact X-ray binary. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | LOW-MASS ; PERIODIC MODULATION ; SAX J1808.4-3658 ; ACCRETION DISCS ; ORBITAL PERIOD ; EVOLUTION ; SYSTEMS ; 4U-1543-624 ; ULTRAVIOLET ; RADIATION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000362844700001 |
| 源URL | [http://119.78.226.72/handle/331011/28377]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 2.Univ Wisconsin Milwaukee, Dept Phys, Milwaukee, WI 53211 USA 3.MIT, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA |
| 推荐引用方式 GB/T 7714 | Wang, Z.,Tziamtzis, A.,Kaplan, D. L.,et al. Optical Modulation in the X-Ray Binary 4U 1543-624 Revisited[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA,2015,32(2):1. |
| APA | Wang, Z.,Tziamtzis, A.,Kaplan, D. L.,&Chakrabarty, D..(2015).Optical Modulation in the X-Ray Binary 4U 1543-624 Revisited.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA,32(2),1. |
| MLA | Wang, Z.,et al."Optical Modulation in the X-Ray Binary 4U 1543-624 Revisited".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA 32.2(2015):1. |
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来源：上海天文台
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