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ON THE NATURE OF THE FIRST TRANSIENT Z SOURCE XTE J1701-462: ITS ACCRETION DISK STRUCTURE, NEUTRON STAR MAGNETIC FIELD STRENGTH, AND HARD TAIL
G.Q.Ding1; S.N.Zhang2; N.Wang1; J.L.Qu2; S.P.Yan1,3
2011-08
Source PublicationThe Astronomical Journal
ISSN0004-6256
Volume142Issue:34Pages:34
Contribution Rank1
Abstract

Using data from the Rossi X-Ray Timing Explorer, we investigate the spectral evolution along a "Z" track and a "v" track on the hardness-intensity diagrams of the first transient Z source XTE J1701-462. The spectral analyses suggest that the inner disk radius depends on the mass accretion rate, in agreement with the model prediction, R-in alpha (M) over dot(disk)(2/7), for a radiation-pressure-dominated accretion disk interacting with the magnetosphere of a neutron star (NS). The changes in the disk mass accretion rate (M) over dot(disk) are responsible for the evolution of the "Z" or "v" track. Radiation pressure thickens the disk considerably and also produces significant outflows. The NS surface magnetic field strength, derived from the interaction between the magnetosphere and the radiation-pressure-dominated accretion disk, is similar to(1-3) x 10(9) G, which is possibly between normal atoll and Z sources. A significant hard tail is detected in the horizontal branches and we discuss several possible origins of the hard tail.

KeywordBinaries: General Stars: Individual (Xte J1701-462) Stars: Neutron X-rays: Binaries
Subject Area致密天体、高能和基础物理
DOI10.1088/0004-6256/142/2/34
Indexed BySCI
Language英语
Funding Project高能天体物理研究团组
WOS IDWOS:000292888200001
Funding OrganizationNatural Science Foundation of Xinjiang Uygur Autonomous Region of China (Program 200821164) ; program of the Light in Chinese Western Region (LCWR) under grant LHXZ 200802 provided by Chinese Academy of Sciences (CAS) ; National Basic Research Program of China (973 Program 2009CB824800) ; National Science Foundation of China under grant nos. 10821061, 10733010, and 10725313
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Document Type期刊论文
Identifierhttp://ir.xao.ac.cn/handle/45760611-7/9
Collection射电天文研究室_高能天体物理研究团组
射电天文研究室
其它
Corresponding AuthorG.Q.Ding
Affiliation1.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, 150, Science 1-Street, Urumqi, Xinjiang 830011, China
2.Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
3.Graduate School of Chinese Academy of Sciences, Beijing 100049, China
First Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Corresponding Author AffilicationXinjiang Astronomical Observatory, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
G.Q.Ding,S.N.Zhang,N.Wang,et al. ON THE NATURE OF THE FIRST TRANSIENT Z SOURCE XTE J1701-462: ITS ACCRETION DISK STRUCTURE, NEUTRON STAR MAGNETIC FIELD STRENGTH, AND HARD TAIL[J]. The Astronomical Journal,2011,142(34):34.
APA G.Q.Ding,S.N.Zhang,N.Wang,J.L.Qu,&S.P.Yan.(2011).ON THE NATURE OF THE FIRST TRANSIENT Z SOURCE XTE J1701-462: ITS ACCRETION DISK STRUCTURE, NEUTRON STAR MAGNETIC FIELD STRENGTH, AND HARD TAIL.The Astronomical Journal,142(34),34.
MLA G.Q.Ding,et al."ON THE NATURE OF THE FIRST TRANSIENT Z SOURCE XTE J1701-462: ITS ACCRETION DISK STRUCTURE, NEUTRON STAR MAGNETIC FIELD STRENGTH, AND HARD TAIL".The Astronomical Journal 142.34(2011):34.
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