THE HARD X-RAY BEHAVIOR OF AQL X-1 DURING TYPE-I BURSTS

被引：26

作者：

Chen, Yu-Peng ^{[1
]}

Zhang, Shu ^{[1
]}

Zhang, Shuang-Nan ^{[1
]}

Ji, Long ^{[1
]}

Torres, Diego F. ^{[2
,3
]}

Kretschmar, Peter ^{[4
]}

Li, Jian ^{[1
]}

Wang, Jian-Min ^{[1
,5
]}

机构：

[1] Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China

[2] Inst Catalana Recerca & Estudis Avancats, E-08010 Barcelona, Spain

[3] Inst Space Sci IEEC CSIC, E-08193 Barcelona, Spain

[4] European Space Astron Ctr ESA ESAC, Sci Operat Dept, Villanueva De La Cannada, Madrid, Spain

[5] Chinese Acad Sci, Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2013年 / 777卷 / 01期

基金：

中国国家自然科学基金;

关键词：

stars: coronae; stars: neutron; X-rays: binaries; X-rays: bursts; X-rays: individual (Aql X-1); SPECTRAL STATES; AQUILA X-1; ACCRETION; OUTBURSTS; CORONA; DISKS;

D O I：

10.1088/2041-8205/777/1/L9

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the discovery of an anti-correlation between the soft and hard X-ray light curves of the X-ray binary Aql X-1 when bursting. This behavior may indicate that the corona is cooled by the soft X-ray shower fed by the type-I X-ray bursts, and that this process happens within a few seconds. Stacking the Aql X-1 light curves of type-I bursts, we find a shortage in the 40-50 keV band, delayed by 4.5 +/- 1.4 s with respect to the soft X-rays. The photospheric radius expansion bursts are different in that neither a shortage nor an excess shows up in the hard X-ray light curve.

引用

页数：4

共 24 条

[1] Reflection spectra from an accretion disc illuminated by a neutron star X-ray burst [J].

Ballantyne, DR .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2004, 351 (01) :57-62

[2] The 2008 outburst of IGR J17473-2721: evidence for a disk corona? [J].

Chen, Y. -P. ;

Zhang, S. ;

Torres, D. F. ;

Zhang, S. -N. ;

Li, J. ;

Kretschmar, P. ;

Wang, J. -M. .

ASTRONOMY & ASTROPHYSICS, 2011, 534

[3] Type-I bursts within outbursts of IGR J17473-2721 [J].

Chen, Y. -P. ;

Zhang, S. ;

Torres, D. F. ;

Wang, J. -M. ;

Li, T. -P. .

ASTRONOMY & ASTROPHYSICS, 2010, 510

[4] TYPE-I X-RAY BURSTS REVEAL A FAST CO-EVOLVING BEHAVIOR OF THE CORONA IN AN X-RAY BINARY [J].

Chen, Yu-Peng ;

Zhang, Shu ;

Zhang, Shuang-Nan ;

Li, Jian ;

Wang, Jian-Min .

ASTROPHYSICAL JOURNAL LETTERS, 2012, 752 (02)

[5] Thermonuclear X-ray bursts: theory vs. observations [J].

Cumming, A .

NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS, 2004, 132 :435-445

[6] Advection-dominated accretion and the spectral states of black hole X-ray binaries: Application to Nova Muscae 1991 [J].

Esin, AA ;

McClintock, JE ;

Narayan, R .

ASTROPHYSICAL JOURNAL, 1997, 489 (02) :865-889

[7]

Frank J., 2002, ACCRETION POWER ASTR, V3rd edn, DOI DOI 10.1017/CBO9781139164245

[8] THERMONUCLEAR (TYPE I) X-RAY BURSTS OBSERVED BY THE ROSSI X-RAY TIMING EXPLORER [J].

Galloway, Duncan K. ;

Muno, Michael P. ;

Hartman, Jacob M. ;

Psaltis, Dimitrios ;

Chakrabarty, Deepto .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2008, 179 (02) :360-422

[9] Analysing the atolls: X-ray spectral transitions of accreting neutron stars [J].

Gladstone, Jeanette ;

Done, Chris ;

Gierlinski, Marek .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2007, 378 (01) :13-22

[10]

Int Zand J.J.M., 2013, A & AR, V553, pA83

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