CONFIRMATION OF A HIGH MAGNETIC FIELD IN GRO J1008-57

被引：25

作者：

Bellm, Eric C. ^{[1
]}

Fuerst, Felix ^{[1
]}

Pottschmidt, Katja ^{[2
,3
,4
]}

Tomsick, John A. ^{[5
]}

Boggs, Steven E. ^{[5
]}

Chakrabarty, Deepto ^{[6
]}

Christensen, Finn E. ^{[7
]}

Craig, William W. ^{[5
,8
]}

Hailey, Charles J. ^{[9
]}

Harrison, Fiona A. ^{[1
]}

Stern, Daniel ^{[10
]}

Walton, Dominic J. ^{[1
]}

Wilms, Joern ^{[11
]}

Zhang, William W. ^{[12
]}

机构：

[1] CALTECH, Cahill Ctr Astron & Astrophys, Pasadena, CA 91125 USA

[2] Univ Maryland Baltimore Cty, Ctr Space Sci & Technol, Baltimore, MD 21250 USA

[3] CRESST, Greenbelt, MD 20771 USA

[4] NASA, Goddard Space Flight Ctr, Astrophys Sci Div, Greenbelt, MD 20771 USA

[5] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA

[6] MIT, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA

[7] Tech Univ Denmark, DTU Space, Natl Space Inst, DK-2800 Lyngby, Denmark

[8] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[9] Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA

[10] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[11] Dr Karl Remeis Sternwarte & ECAP, D-96049 Bamberg, Germany

[12] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

来源：

ASTROPHYSICAL JOURNAL | 2014年 / 792卷 / 02期

基金：

美国国家航空航天局;

关键词：

pulsars: individual (GRO J1008-57); stars: neutron; X-rays: binaries; SPECTROSCOPIC-TELESCOPE-ARRAY; X-RAY PULSARS; CYCLOTRON LINE; LMC X-4; ENERGY; ABSORPTION; DISCOVERY; SPECTRUM; MISSION; BINARY;

D O I：

10.1088/0004-637X/792/2/108

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

GRO J1008-57 is a high-mass X-ray binary for which several claims of a cyclotron resonance scattering feature near 80 keV have been reported. We use NuSTAR, Suzaku, and Swift data from its giant outburst of 2012 November to confirm the existence of the 80 keV feature and perform the most sensitive search to date for cyclotron scattering features at lower energies. We find evidence for a 78(-2)(+3) keV line in the NuSTAR and Suzaku data at >4 sigma significance, confirming the detection using Suzaku alone by Yamamoto et al. A search of both the phase-averaged and phase-resolved data rules out a fundamental at lower energies with optical depth larger than 5% of the 78 keV line. These results indicate that GRO J1008-57 has a magnetic field of 6.7 x 10(12)(1 + z) G, the highest among known accreting pulsars.

引用

页数：7

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