YNAO OpenIR  > 中国科学院天体结构与演化重点实验室
Study of the X-ray properties of the neutron star binary 4U 1728-34 from the soft-to-hard state
Wang, Yanan1; Mendez, Mariano1; Altamirano, Diego2; Zhang, Guobao3,4; Belloni, T. M.5; Ribeiro, Evandro M.1; Linares, M.6,7; Sanna, Andrea8; Motta, S. E.9; Tomsick, John A.10
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2019-04-01
Volume484Issue:3Pages:3004-3016
DOI10.1093/mnras/stz169
Indexed BySCI
Keywordaccretion, accretion disc X-rays: individual: 4U 1728-34
Abstract

We studied five XMM-Newton observations of the neutron star binary 4U 1728-34 covering the hard, intermediate and soft spectral states. By jointly fitting the spectra with several reflection models, we obtained an inclination angle of 25 degrees-53 degrees and an iron abundance up to 10 times the solar. From the fits with reflection models, we found that the fluxes of the reflection and the Comptonized components vary inconsistently; since the latter is assumed to be the illuminating source, this result possibly indicates the contribution of the neutron star surface/boundary layer to the disc reflection. As the source evolved from the relatively soft to the intermediate state, the disc inner radius decreased, opposite to the prediction of the standard accretion disc model. We also explore the possible reasons why the supersolar iron abundance is required by the data and found that this high value is probably caused by the absence of the hard photons in the XMM-Newton data.

Funding ProjectChina Scholarship Council (CSC)[201404910530] ; ASI-INAF[2017-14-H.0] ; Royal Society ; Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq-Brazil) ; CAS Pioneer Hundred Talent Program[Y7CZ181001]
Funding OrganizationChina Scholarship Council (CSC)[201404910530] ; ASI-INAF[2017-14-H.0] ; Royal Society ; Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq-Brazil) ; CAS Pioneer Hundred Talent Program[Y7CZ181001]
Language英语
Subject Area天文学 ; 天体物理学 ; 高能天体物理学 ; 恒星与银河系
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherOXFORD UNIV PRESS
Publication PlaceGREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN0035-8711
URL查看原文
WOS IDWOS:000462410300009
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordQUASI-PERIODIC OSCILLATIONS ; ADVECTION-DOMINATED ACCRETION ; PHOTON IMAGING CAMERA ; IRON EMISSION-LINE ; XMM-NEWTON ; SPECTRAL BEHAVIOR ; COLD MATTER ; REFLECTION ; VARIABILITY ; 4U-1728-34
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/19652
Collection中国科学院天体结构与演化重点实验室
Corresponding AuthorWang, Yanan
Affiliation1.Kapteyn Astronomical Institute, University of Groningen, PO BOX 800, NL-9700 AV Groningen, the Netherlands
2.Physics & Astronomy, University of Southampton, Southampton, Hampshire SO17 1BJ, UK
3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650216 Kunming, PR China
4.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, P. R. China
5.Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Brera, Via E. Bianchi 46, I-23807 Merate, Italy
6.Departament de F´ısica, EEBE, Universitat Polit`ecnica de Catalunya, Av. Eduard Maristany 16, E-08019 Barcelona, Spain
7.Institute of Space Studies of Catalonia (IEEC), E-08034 Barcelona, Spain
8.Dipartimento di Fisica, Universit´a degli Studi di Cagliari, SP Monserrato-Sestu km 0.7, I-09042 Monserrato, Italy
9.University of Oxford, Department of Physics, Astrophysics Denys Wilkinson Building Keble Road, Oxford OX1 3RH, UK
10.Space Sciences Laboratory, 7 Gauss Way, University of California, Berkeley, CA 94720-7450, USA
Recommended Citation
GB/T 7714
Wang, Yanan,Mendez, Mariano,Altamirano, Diego,et al. Study of the X-ray properties of the neutron star binary 4U 1728-34 from the soft-to-hard state[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,484(3):3004-3016.
APA Wang, Yanan.,Mendez, Mariano.,Altamirano, Diego.,Zhang, Guobao.,Belloni, T. M..,...&Tomsick, John A..(2019).Study of the X-ray properties of the neutron star binary 4U 1728-34 from the soft-to-hard state.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,484(3),3004-3016.
MLA Wang, Yanan,et al."Study of the X-ray properties of the neutron star binary 4U 1728-34 from the soft-to-hard state".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 484.3(2019):3004-3016.
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