SWIFT J1753.5-0127: A surprising optical/X-ray cross-correlation function

被引：52

作者：

Durant, Martin ^{[1
]}

Gandhi, Poshak ^{[2
]}

Shahbaz, Tariq ^{[1
]}

Fabian, Andy P. ^{[3
]}

Miller, Jon ^{[4
]}

Dhillon, V. S. ^{[5
]}

Marsh, Tom R. ^{[6
]}

机构：

[1] Inst Astrofis Canarias, E-38205 Tenerife, Spain

[2] RIKEN Inst Phys & Chem Res, Saitama, Japan

[3] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England

[4] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA

[5] Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire, England

[6] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2008年 / 682卷 / 01期

基金：

英国科学技术设施理事会;

关键词：

binaries : general; stars : individual (SWIFT J1753.5-0127);

D O I：

10.1086/590906

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have conducted simultaneous optical and X-ray observations of SWIFT J1753.5-0127 with RXTE and ULTRACAM, while the system persisted in its relatively bright low/hard state. In the cross-correlation function, we find that the optical emission, with a broad negative peak, leads the X-ray emission by a few seconds and has a smaller positive peak at positive lags. This is markedly different from what was seen for the similarly interesting system XTE J1118+480, and it is the first time that such a correlation function has been so clearly measured. We suggest a physical scenario for its origin.

引用

页码：L45 / L48

页数：4

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