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The parallel tracks of kHz QPOs in low-mass X-ray binary 4U 1728-34: explorer of the bimodal accretion modes
Wang, De-Hua1; Zhang, Cheng-Min2,3,4
2020-09-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume497Issue:3Pages:2893-2898
AbstractParallel tracks in the relation between the lower kilohertz quasi-periodic oscillation (kHz QPO) frequency.1 and the X-ray intensity I have been observed in the neutron star low-mass X-ray binary (NS-LMXB) 4U 1728-34, and we try to ascribe these phenomena to the bimodal accretion modes, i.e. the disc accretion and radial accretion. For the source with one constant radial accretion rate (M)over dot(r), as the increase of the disc accretion rate (M)over dot(d), the NS magnetosphere-disc radius can shrink from similar to 18 to similar to 16 km, while nu(1) increases from similar to 670 to similar to 870 Hz. Then, due to the increase of the kHz QPO frequency and total X-ray intensity Itot, the source will trace out an oblique track in nu(1)-I relation. While, if the source enters another constant radial accretion rate due to the variation of the accretion environment, the increase of the disc accretion rate can arise another parallel track in nu(1)-I relation. Finally, the reliability of the theoretical assumptions, the variability of the accretion radius and accretion rate, as well as the dependence of the two accretion modes, are also investigated and discussed.
Keywordaccretion, accretion discs stars: individual: 4U 1728-34 stars: neutron X-rays: binaries
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Guizhou Provincial Science and Technology Foundation ; Guizhou Provincial Science and Technology Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Guizhou Provincial Science and Technology Foundation ; Guizhou Provincial Science and Technology Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Guizhou Provincial Science and Technology Foundation ; Guizhou Provincial Science and Technology Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Guizhou Provincial Science and Technology Foundation ; Guizhou Provincial Science and Technology Foundation
DOI10.1093/mnras/staa2161
WOS KeywordQUASI-PERIODIC OSCILLATIONS ; ATOLL SOURCE STATES ; NEUTRON-STAR ; LOW-FREQUENCY ; TIMING FEATURES ; VARIABILITY ; AMPLITUDE ; DISCOVERY ; BEHAVIOR ; SPIN
Language英语
Funding ProjectNational Natural Science Foundation of China[11703003] ; National Natural Science Foundation of China[U1938117] ; National Natural Science Foundation of China[U1731238] ; Guizhou Provincial Science and Technology Foundation[[2020]1Y016]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; Guizhou Provincial Science and Technology Foundation ; Guizhou Provincial Science and Technology Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Guizhou Provincial Science and Technology Foundation ; Guizhou Provincial Science and Technology Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Guizhou Provincial Science and Technology Foundation ; Guizhou Provincial Science and Technology Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Guizhou Provincial Science and Technology Foundation ; Guizhou Provincial Science and Technology Foundation
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000577137200029
PublisherOXFORD UNIV PRESS
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/82069
Collection中国科学院国家天文台
Corresponding AuthorWang, De-Hua; Zhang, Cheng-Min
Affiliation1.Guizhou Normal Univ, Sch Phys & Elect Sci, Guiyang 550001, Peoples R China
2.Natl Astron Observ, CAS Key Lab FAST, Beijing 100101, Peoples R China
3.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Key Lab Radio Astron, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Wang, De-Hua,Zhang, Cheng-Min. The parallel tracks of kHz QPOs in low-mass X-ray binary 4U 1728-34: explorer of the bimodal accretion modes[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,497(3):2893-2898.
APA Wang, De-Hua,&Zhang, Cheng-Min.(2020).The parallel tracks of kHz QPOs in low-mass X-ray binary 4U 1728-34: explorer of the bimodal accretion modes.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,497(3),2893-2898.
MLA Wang, De-Hua,et al."The parallel tracks of kHz QPOs in low-mass X-ray binary 4U 1728-34: explorer of the bimodal accretion modes".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 497.3(2020):2893-2898.
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