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The amplitude of the kilohertz quasi-periodic oscillations in 4U 1636-53 in the frequency-energy space
Ribeiro, Evandro M.1; Mendez, Mariano1; de Avellar, Marcio G. B.2; Zhang GB(张国宝)3,4; Karpouzas, Konstantinos1,5
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2019-11-01
Volume489Issue:4Pages:4980-4991
DOI10.1093/mnras/stz2463
Contribution Rank第3完成单位
Indexed BySCI
Keywordaccretion, accretion discs stars: individual: 4U 1636-53 stars: neutron X-rays: binaries
Abstract

We present for the neutron-star low-mass X-ray binary 4U 1636-53, and for the first time for any source of kilohertz quasi-periodic oscillations (kHz QPOs), the two-dimensional behaviour of the fractional rms amplitude of the kHz QPOs in the parameter space defined by QPO frequency and photon energy. We find that the rms amplitude of the lower kHz QPO increases with energy up to similar to 12 keV and then decreases at higher energies, while the rms amplitude of the upper kHz QPO either continues increasing or levels off at high energies. The rms amplitude of the lower kHz QPO increases and then decreases with frequency, peaking at similar to 760 Hz, while the amplitude of the upper kHz QPO decreases with frequency, with a local maximum at around similar to 770 Hz, and is consistent with becoming zero at the sameQPOfrequency, similar to 1400 Hz, in all energy bands, thus constraining the neutron-star mass at M-NS <= 1.6M(circle dot), under the assumption that this QPO reflects the Keplerian frequency at the inner edge of the accretion disc. We show that the slope of the rms energy spectrum is connected to the changing properties of the kHz QPOs in different energy bands as its frequencies change. Finally, we discuss a possible mechanism responsible for the radiative properties of the kHz QPOs and, based on a model in which the QPO arises from oscillations in a Comptonizing cloud of hot electrons, we show that the properties of the kHz QPOs can constrain the thermodynamic properties of the inner accretion flow.

Funding ProjectConselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq-Brazil) ; CNPq[150999/2018-6] ; Sao Paulo Research Foundation (FAPESP -Brazil) Thematic Project[2013/26258-4] ; National Natural Science Foundation of China (NSFC)[U1838116] ; CAS Pioneer Hundred Talent Program[Y7CZ181002]
Funding OrganizationConselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq-Brazil) ; CNPq[150999/2018-6] ; Sao Paulo Research Foundation (FAPESP -Brazil) Thematic Project[2013/26258-4] ; National Natural Science Foundation of China (NSFC)[U1838116] ; CAS Pioneer Hundred Talent Program[Y7CZ181002]
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:000489302400041
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordX-RAY VARIABILITY ; NEUTRON-STARS ; SOURCE STATES ; KHZ QPO ; MODEL ; DISCOVERY ; COHERENCE ; BINARIES ; DISKS ; PRECESSION
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/21418
Collection高能天体物理研究组
中国科学院天体结构与演化重点实验室
Corresponding AuthorRibeiro, Evandro M.
Affiliation1.Kapteyn Astronomical Institute, University of Groningen, PO BOX 800, NL-9700 AV Groningen, the Netherlands
2.Instituto Tecnol´ogico de Aeron´autica, ITA, 1228-900, SP, Brazil
3.Yunnan Observatories, Chinese Academy of Sciences (CAS), Kunming 650216, P.R. China
4.Key Laboratory for the Structure and Evolution of Celestial Objects, CAS, Kunming 650216, P.R. China
5.School of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ, UK.
Recommended Citation
GB/T 7714
Ribeiro, Evandro M.,Mendez, Mariano,de Avellar, Marcio G. B.,et al. The amplitude of the kilohertz quasi-periodic oscillations in 4U 1636-53 in the frequency-energy space[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2019,489(4):4980-4991.
APA Ribeiro, Evandro M.,Mendez, Mariano,de Avellar, Marcio G. B.,Zhang GB,&Karpouzas, Konstantinos.(2019).The amplitude of the kilohertz quasi-periodic oscillations in 4U 1636-53 in the frequency-energy space.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,489(4),4980-4991.
MLA Ribeiro, Evandro M.,et al."The amplitude of the kilohertz quasi-periodic oscillations in 4U 1636-53 in the frequency-energy space".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 489.4(2019):4980-4991.
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