Timing and X-ray spectral features of Swift J1626.6-5156

被引：11

作者：

Icdem, Burcin ^{[1
]}

Inam, Sitki Cagdas ^{[2
]}

Baykal, Altan ^{[1
]}

机构：

[1] METU, Dept Phys, TR-06531 Ankara, Turkey

[2] Baskent Univ, Dept Elect & Elect Engn, TR-06530 Ankara, Turkey

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2011年 / 415卷 / 02期

关键词：

accretion; accretion discs; stars: neutron; pulsars: individual: Swift J1626.6-5156; X-rays: binaries; MAGNETIZED NEUTRON-STARS; PULSAR ATMOSPHERES; ACCRETING PULSARS; TORQUE; MODELS; PERIOD;

D O I：

10.1111/j.1365-2966.2011.18796.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this paper, we extend the timing analysis by Baykal et al. of Swift J1626.6-5156 using RXTE-PCA observations between MJD 53724 and MJD 55113 together with a Chandra-ACIS observation on MJD 54897 with a 20-ks exposure. We also present the X-ray spectral analysis of these RXTE and Chandra observations. We find that the spin-up rate of the source is correlated with the X-ray flux. Using this correlation, we estimate the distance and surface magnetic field of the source as similar to 15 kpc and similar to 9 x 10(11) G, respectively. From the spectral analysis, we find that the power-law index increases and hydrogen column density decreases with a decreasing flux.

引用

页码：1523 / 1526

页数：4

共 39 条

[1] Timing studies on RXTE observations of SAX J2103.5+4545 [J].

Baykal, A. ;

Inam, S. C. ;

Stark, M. J. ;

Heffner, C. M. ;

Erkoca, A. E. ;

Swank, J. H. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2007, 374 (03) :1108-1114

[2] X-ray spectra and pulse frequency changes in SAX J2103.5+4545 [J].

Baykal, A ;

Stark, MJ ;

Swank, JH .

ASTROPHYSICAL JOURNAL, 2002, 569 (02) :903-910

[3] THE ORBITAL PERIOD OF SWIFT J1626.6-5156 [J].

Baykal, Altan ;

Gogus, Ersin ;

Inam, Sitki Cagdas ;

Belloni, Tomaso .

ASTROPHYSICAL JOURNAL, 2010, 711 (02) :1306-1309

[4] Observations of accreting pulsars [J].

Bildsten, L ;

Chakrabarty, D ;

Chiu, J ;

Finger, MH ;

Koh, DT ;

Nelson, RW ;

Prince, TA ;

Rubin, BC ;

Scott, DM ;

Stollberg, M ;

Vaughan, BA ;

Wilson, CA ;

Wilson, RB .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1997, 113 (02) :367-408

[5] The 1999 Hercules X-1 anomalous low state [J].

Coburn, W ;

Heindl, WA ;

Wilms, J ;

Gruber, DE ;

Staubert, R ;

Rothschild, RE ;

Postnov, KA ;

Shakura, N ;

Risse, P ;

Kreykenbohm, I ;

Pelling, MR .

ASTROPHYSICAL JOURNAL, 2000, 543 (01) :351-358

[6] Magnetic fields of accreting X-ray pulsars with the Rossi X-ray Timing Explorer [J].

Coburn, W ;

Heindl, WA ;

Rothschild, RE ;

Gruber, DE ;

Kreykenbohm, I ;

Wilms, J ;

Kretschmar, P ;

Staubert, R .

ASTROPHYSICAL JOURNAL, 2002, 580 (01) :394-412

[7]

COBURN W, 2006, AAS HIGH ENERGY ASTR, V9, P170

[8] Accretion torque on magnetized neutron stars [J].

Dai, HL ;

Li, XD .

ASTRONOMY & ASTROPHYSICS, 2006, 451 (02) :581-585

[9]

DECESAR ME, 2009, ATEL, P2036

[10]

Deeter J.E., 1985, P IN WORKSH TIM STUD, P29

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