Understanding the nature of the intriguing source X Persei: a deep look with a Suzaku observation

被引：13

作者：

Maitra, Chandreyee ^{[1
,7
]}

Raichur, Harsha ^{[2
,3
]}

Pradhan, Pragati ^{[4
,5
]}

Paul, Biswajit ^{[6
]}

机构：

[1] Univ Paris Diderot, CNRS, CEA, Lab AIM,IRFU,Serv Astrophys,CEA Saclay,DSM, Bat 709, F-91191 Gif Sur Yvette, France

[2] KTH Royal Inst Technol, Nordita, Roslagstullsbacken 23, SE-10691 Stockholm, Sweden

[3] Stockholm Univ, Roslagstullsbacken 23, SE-10691 Stockholm, Sweden

[4] St Josephs Coll, Darjeeling 734104, W Bengal, India

[5] North Bengal Univ, Darjeeling 734013, W Bengal, India

[6] Raman Res Inst, CV Raman Ave, Bangalore 560064, Karnataka, India

[7] Max Planck Inst Extraterr Phys, Giessenbachstr, D-85748 Garching, Germany

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2017年 / 470卷 / 01期

关键词：

stars: neutron; X-rays: binaries; X-rays: individual: X Persei; CYCLOTRON LINE ENERGY; RAY PULSARS; POSITIVE CORRELATION; GX; 304-1; ACCRETION; DISCOVERY; OUTBURST; LUMINOSITY; SPECTRUM; FEATURES;

D O I：

10.1093/mnras/stx1281

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present detailed broad-band timing and spectral analysis of the persistent, low luminosity and slowly spinning pulsar X Persei using a deep Suzaku observation of the source. The spectrum is unusually hard with a cyclotron resonance scattering feature (CRSF), the presence of which has been debated. By comparing the spectral models relevant for accretion-powered pulsars, we have obtained the best constraint on the broad-band spectral model of X Persei obtained so far. The CRSF is not confirmed in the average spectrum. We have also identified the presence of different intensity levels in the source with distinct changes in the pulse profile and the energy spectrum indicating changes in the accretion geometry. We further find evidence of a CRSF in the highest intensity levels at similar to 40 keV, indicating a magnetic field strength of 3.4 x 10(12) G.

引用

页码：713 / 722

页数：10

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