Coupling between the 45 Hz horizontal-branch oscillation and the normal-branch oscillation in Scorpius X-1
文献类型：期刊论文
| 作者 | Yu, Wenfei
|
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2007-04-20 |
| 卷号 | 659期号:2页码:L145-L148 |
| 关键词 | accretion stars : individual (Scorpius X-1) stars : neutron X-rays : stars accretion disks |
| 英文摘要 | The observations of the bright persistent neutron star low-mass X-ray binary (LMXB) Sco X-1 performed with the Rossi X-Ray Timing Explorer (RXTE) show a similar to 6 Hz normal-branch oscillation (NBO), a similar to 45 Hz horizontal-branch oscillation (HBO), and twin kilohertz quasi-periodic oscillations (kHz QPOs) on its normal branch simultaneously. We have found that the fractional amplitude of the HBO corresponding to the NBO phase of high flux is 1.1%, while that of the NBO phase of low flux is undetectable, with a 3 sigma upper limit of 0.4%, implying that the HBO strength varies with the NBO phase in a manner opposite that of the lower kHz QPO previously found, and suggests that the condition for the generation of the HBO is met when the NBO flux is high. The 6 Hz NBO in Sco X-1 connects the 45 Hz HBO and the twin kHz QPO together, showing a unique picture indicating a coupling between the QPOs, which has never been observed in other neutron star LMXBs. We discuss the implications for current models of the 45 Hz HBO, the 6 Hz NBO, and the twin kHz QPOs. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | QUASI-PERIODIC OSCILLATIONS ; X-RAY BINARIES ; ACCRETING BLACK-HOLES ; NEUTRON-STAR ; FREQUENCY ; DEPENDENCE ; FEATURES ; MODEL |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000245775000016 |
| 源URL | [http://119.78.226.72/handle/331011/19421]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | Shanghai Astron Observ, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Wenfei. Coupling between the 45 Hz horizontal-branch oscillation and the normal-branch oscillation in Scorpius X-1[J]. ASTROPHYSICAL JOURNAL,2007,659(2):L145-L148. |
| APA | Yu, Wenfei.(2007).Coupling between the 45 Hz horizontal-branch oscillation and the normal-branch oscillation in Scorpius X-1.ASTROPHYSICAL JOURNAL,659(2),L145-L148. |
| MLA | Yu, Wenfei."Coupling between the 45 Hz horizontal-branch oscillation and the normal-branch oscillation in Scorpius X-1".ASTROPHYSICAL JOURNAL 659.2(2007):L145-L148. |
入库方式： OAI收割
来源：上海天文台
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