Hot disc of the Swift J0243.6+6124 revealed by Insight-HXMT

被引：149

作者：

Doroshenko, V ^{[1
,2
]}

Zhang, S. N. ^{[3
,4
]}

Santangelo, A. ^{[1
]}

Ji, L. ^{[1
]}

Tsygankov, S. ^{[2
,5
]}

Mushtukov, A. ^{[2
,6
,7
]}

Qu, L. J. ^{[3
]}

Zhang, S. ^{[3
]}

Ge, M. Y. ^{[3
]}

Chen, Y. P. ^{[3
]}

Bu, Q. C. ^{[3
]}

Cao, X. L. ^{[3
]}

Chang, Z. ^{[3
]}

Chen, G. ^{[3
]}

Chen, L. ^{[8
]}

Chen, T. X. ^{[3
]}

Chen, Y. ^{[3
]}

Chen, Y. B. ^{[9
]}

Cui, W. ^{[1
,10
]}

Cui, W. W. ^{[3
]}

Deng, J. K. ^{[9
]}

Dong, Y. W. ^{[3
]}

Du, Y. Y. ^{[3
]}

Fu, M. X. ^{[9
]}

Gao, G. H. ^{[3
,4
]}

Gao, H. ^{[3
,4
]}

Gao, M. ^{[3
]}

Gu, Y. D. ^{[3
]}

Guan, J. ^{[3
]}

Guo, C. C. ^{[3
,4
]}

Han, D. W. ^{[3
]}

Hu, W. ^{[3
]}

Huang, Y. ^{[3
]}

Huo, J. ^{[3
]}

Jia, S. M. ^{[3
]}

Jiang, L. H. ^{[3
]}

Jiang, W. C. ^{[3
]}

Jin, J. ^{[3
]}

Jin, Y. J. ^{[11
]}

Kong, L. D. ^{[3
,4
]}

Li, B. ^{[3
]}

Li, C. K. ^{[3
]}

Li, G. ^{[3
]}

Li, M. S. ^{[3
]}

Li, T. P. ^{[1
,3
,10
]}

Li, W. ^{[3
]}

Li, X. ^{[3
]}

Li, X. B. ^{[3
]}

Li, X. F. ^{[3
]}

Li, Y. G. ^{[3
]}

机构：

[1] Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany

[2] Russian Acad Sci, Space Res Inst, Profsoyuznaya Str 84-32, Moscow 117997, Russia

[3] Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, 19B Yuquan Rd, Beijing 100049, Peoples R China

[4] Chinese Acad Sci, Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[5] Univ Turku, Dept Phys & Astron, FI-20014 Turku, Finland

[6] Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands

[7] Univ Amsterdam, Anton Pannekoek Inst, Sci Pk 904, NL-1098 XH Amsterdam, Netherlands

[8] Beijing Normal Univ, Dept Astron, Beijing 100088, Peoples R China

[9] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China

[10] Tsinghua Univ, Dept Astron, Beijing 100084, Peoples R China

[11] Tsignhua Univ, Dept Engn Phys, Beijing 100084, Peoples R China

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2020年 / 491卷 / 02期

基金：

俄罗斯科学基金会; 中国国家自然科学基金;

关键词：

accretion; accretion discs; stars: magnetic field; stars: neutron; pulsars: general; pulsars: individual: Swift J0243.6+6124; X-rays: binaries; X-RAY PULSARS; MAGNETIC-FIELD; NEUTRON-STARS; ACCRETION LUMINOSITY; VARIABILITY; BINARIES;

D O I：

10.1093/mnras/stz2879

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report on analysis of observations of the bright transient X-ray pulsar (XRP) Swift J0243.6+6124 obtained during its 2017-2018 giant outburst with Insight-HXMT, NuSTAR, and Swift observatories. We focus on the discovery of a sharp state transition of the timing and spectral properties of the source at super-Eddington accretion rates, which we associate with the transition of the accretion disc to a radiation pressure dominated state, the first ever directly observed for magnetized neutron star. This transition occurs at slightly higher luminosity compared to already reported transition of the source from sub- to supercritical accretion regime associate with onset of an accretion column. We argue that this scenario can only be realized for comparatively weakly magnetized neutron star, not dissimilar to other ultra-luminous X-ray pulsars, which accrete at similar rates. Further evidence for this conclusion is provided by the non-detection of the transition to the propeller state in quiescence which strongly implies compact magnetosphere and thus rules out magnetar-like fields.

引用

页码：1857 / 1867

页数：11

共 52 条

[1] Modelling the spin equilibrium of neutron stars in low-mass X-ray binaries without gravitational radiation [J].

Andersson, N ;

Glampedakis, K ;

Haskell, B ;

Watts, AL .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2005, 361 (04) :1153-1164

[2] An ultraluminous X-ray source powered by an accreting neutron star [J].

Bachetti, M. ;

Harrison, F. A. ;

Walton, D. J. ;

Grefenstette, B. W. ;

Chakrabarty, D. ;

Fuerst, F. ;

Barret, D. ;

Beloborodov, A. ;

Boggs, S. E. ;

Christensen, F. E. ;

Craig, W. W. ;

Fabian, A. C. ;

Hailey, C. J. ;

Hornschemeier, A. ;

Kaspi, V. ;

Kulkarni, S. R. ;

Maccarone, T. ;

Miller, J. M. ;

Rana, V. ;

Stern, D. ;

Tendulkar, S. P. ;

Tomsick, J. ;

Webb, N. A. ;

Zhang, W. W. .

NATURE, 2014, 514 (7521) :202-+

[3] Estimating Distance from Parallaxes. IV. Distances to 1.33 Billion Stars in Gaia Data Release 2 [J].

Bailer-Jones, C. A. L. ;

Rybizki, J. ;

Fouesneau, M. ;

Mantelet, G. ;

Andrae, R. .

ASTRONOMICAL JOURNAL, 2018, 156 (02)

[4] LIMITING LUMINOSITY OF ACCRETING NEUTRON STARS WITH MAGNETIC-FIELDS [J].

BASKO, MM ;

SUNYAEV, RA .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1976, 175 (02) :395-417

[5] Spectral formation in accreting X-ray pulsars: bimodal variation of the cyclotron energy with luminosity [J].

Becker, P. A. ;

Klochkov, D. ;

Schoenherr, G. ;

Nishimura, O. ;

Ferrigno, C. ;

Caballero, I. ;

Kretschmar, P. ;

Wolff, M. T. ;

Wilms, J. ;

Staubert, R. .

ASTRONOMY & ASTROPHYSICS, 2012, 544

[6] Super-Eddington accretion on to a magnetized neutron star [J].

Chashkina, Anna ;

Abolmasov, Pavel ;

Poutanen, Juri .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2017, 470 (03) :2799-2813

[7] Constraining the dipolar magnetic field of M82 X-2 by the accretion model [J].

Chen, Wen-Cong .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2017, 465 (01) :L6-L9

[8] PULSE-TIMING OBSERVATIONS OF HERCULES-X-1 [J].

DEETER, JE ;

BOYNTON, PE ;

PRAVDO, SH .

ASTROPHYSICAL JOURNAL, 1981, 247 (03) :1003-1012

[9]

DEJAGER OC, 1989, ASTRON ASTROPHYS, V221, P180

[10] Orbit and intrinsic spin-up of the newly discovered transient X-ray pulsar Swift J0243.6+6124 [J].

Doroshenko, V. ;

Tsygankov, S. ;

Santangelo, A. .

ASTRONOMY & ASTROPHYSICS, 2018, 613

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