Correlation between fast quasi-periodic oscillations and X-ray spectral shape in atoll sources

被引：39

作者：

Kaaret, P

Yu, WF

Ford, EC

Zhang, SN

机构：

[1] Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA

[2] Inst High Energy Phys, LCRHEA, Beijing 100039, Peoples R China

[3] Univ Space Res Assoc, Huntsville, AL 35806 USA

[4] NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA

来源：

ASTROPHYSICAL JOURNAL | 1998年 / 497卷 / 02期

关键词：

accretion; accretion disks; stars; individual; (4U; 0614+091; 4U; 1608-52); neutron; X-rays;

D O I：

10.1086/311279

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present correlations between the frequency of the fast quasi-periodic oscillations (QPOs) and the shape of the X-ray spectrum in the atoll sources 4U 1608-52 and 4U 0614+091. We find that the photon index of a power-law component of the energy spectrum is well correlated with the QPO frequency in both sources. The correlation between the photon index and the QPO frequency most likely represents a common dependence on some physical parameter of the system.

引用

页码：L93 / L96

页数：4

共 17 条

[11]

PENNINX W, 1989, ASTRON ASTROPHYS, V208, P146

[12]

Sunyaev R. A., 1989, 23 ESLAB S 2 TOP XRA, V1, P627

[13]

SUZUKI K, 1984, PUBL ASTRON SOC JPN, V36, P761

[14] Discovery of microsecond time lags in kilohertz QPOs [J].

Vaughan, BA ;

VanderKlis, M ;

Mendez, M ;

VanParadijs, J ;

Wijnands, RAD ;

Lewin, WHG ;

Lamb, FK ;

Psaltis, D ;

Kuulkers, E ;

Oosterbroek, T .

ASTROPHYSICAL JOURNAL, 1997, 483 (02) :L115-L118

[15]

YOSHIDA K, 1993, PUBL ASTRON SOC JPN, V45, P605

[16] kHz quasi-periodic oscillation in island state of 4U 1608-52 as observed with RXTE/PCA [J].

Yu, W ;

Zhang, SN ;

Harmon, BA ;

Paciesas, WS ;

Robinson, CR ;

Grindlay, JE ;

Bloser, P ;

Barret, D ;

Ford, EC ;

Tavani, M ;

Kaaret, P .

ASTROPHYSICAL JOURNAL, 1997, 490 (02) :L153-L156

[17]

ZHANG W, 1998, APJ, V495, pL19

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