PMO OpenIR
Correlations between the frequencies of twin kHz QPOs and spins of neutron stars in LMXBs
Wang, De-Hua1; Zhang, Cheng-Min2,3,4; Qu, Jin-Lu5; Yang, Yi-Yan6
2018-02-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume473Issue:4Pages:4862-4867
Corresponding AuthorWang, De-Hua(wangdh@gznu.edu.cn) ; Zhang, Cheng-Min(zhangcm@bao.ac.cn)
AbstractWe investigate the correlation between the frequencies of twin kilohertz quasi-periodic oscillations (kHz QPOs) and neutron star (NS) spins in low-mass X-ray binaries (LMXBs), based on the data sets of 12 sources with simultaneously detected twin kHz QPOs and NS spins, and find that the histogram of the ratio between the frequency difference of twin kHz QPOs (Delta nu nu(2) - nu(1)) and NS spin nu(s) shows a non-uniform distribution with a gap at Delta nu/nu(s) similar to 0.65. We try to classify the 12 sources into two categories according to this gap: (I) slow rotators with similar to 311 Hz, XTE J1807.4-294, 4U 1915-05, IGR J17191-2821, 4U 1702-43, 4U 1728-34 and 4U 0614+09 follow a relation Delta nu/nu(s) > 0.65; (II) fast rotators with similar to 546 Hz, SAX J1808.4-3658, KS 1731-260, Aql X-1, 4U 1636-53, SAX J1750.8-2900 and 4U 1608-52 satisfy the relation Delta nu/nu(s) < 0.65. However, the linear fittings of Delta nu versus nu(s) relations of groups (I) and (II) are unsatisfactory to ensure any certain correlations. We suggest that this phenomenon may arise from the fact that most measured kHz QPOs and spins satisfy the conditions of 1.1 nu(s) <= nu(2) < 1300 Hz and Delta nu decreasing with nu(2). Apparently, the diversified distribution of Delta nu/nu(s) refutes the simple beat-frequency model, and the statistical correlations between the twin kHz QPOs and NS spins may arise from the magnetosphere-disc boundary environments, e.g. co-rotation radius and NS radius, that modulate the occurrences of X-ray signals. Furthermore, we also find a distribution of the ratio of nu(2) to nu(1) clusters around the value of similar to 3: 2, which shows no obvious correlation with NS spins.
Keywordaccretion, accretion discs binaries: close stars: neutron X-rays: binaries
DOI10.1093/mnras/stx2578
WOS KeywordQUASI-PERIODIC OSCILLATIONS ; X-RAY BINARIES ; ACCRETING MILLISECOND PULSAR ; ATOLL SOURCE STATES ; 4U 1636-53 ; TIMING FEATURES ; PEAK SEPARATION ; BLACK-HOLE ; DISCOVERY ; RESONANCE
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000424117300042
PublisherOXFORD UNIV PRESS
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/22233
Collection中国科学院紫金山天文台
Corresponding AuthorWang, De-Hua; Zhang, Cheng-Min
Affiliation1.Guizhou Normal Univ, Sch Phys & Elect Sci, Guiyang 550001, Guizhou, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, 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 100012, Peoples R China
5.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
6.Guizhou Educ Univ, Sch Phys & Elect Sci, Guiyang 550018, Guizhou, Peoples R China
Recommended Citation
GB/T 7714
Wang, De-Hua,Zhang, Cheng-Min,Qu, Jin-Lu,et al. Correlations between the frequencies of twin kHz QPOs and spins of neutron stars in LMXBs[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,473(4):4862-4867.
APA Wang, De-Hua,Zhang, Cheng-Min,Qu, Jin-Lu,&Yang, Yi-Yan.(2018).Correlations between the frequencies of twin kHz QPOs and spins of neutron stars in LMXBs.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,473(4),4862-4867.
MLA Wang, De-Hua,et al."Correlations between the frequencies of twin kHz QPOs and spins of neutron stars in LMXBs".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 473.4(2018):4862-4867.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Wang, De-Hua]'s Articles
[Zhang, Cheng-Min]'s Articles
[Qu, Jin-Lu]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wang, De-Hua]'s Articles
[Zhang, Cheng-Min]'s Articles
[Qu, Jin-Lu]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wang, De-Hua]'s Articles
[Zhang, Cheng-Min]'s Articles
[Qu, Jin-Lu]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.