NuSTAR OBSERVATIONS OF MAGNETAR 1E 1841-045

被引：33

作者：

An, Hongjun ^{[1
]}

Hascoet, Romain ^{[2
]}

Kaspi, Victoria M. ^{[1
]}

Beloborodov, Andrei M. ^{[2
]}

Dufour, Francois ^{[1
]}

Gotthelf, Eric V. ^{[2
]}

Archibald, Robert ^{[1
]}

Bachetti, Matteo ^{[3
,4
]}

Boggs, Steven E. ^{[5
]}

Christensen, Finn E. ^{[6
]}

Craig, William W. ^{[5
,7
]}

Greffenstette, Brian W. ^{[8
]}

Hailey, Charles J. ^{[2
]}

Harrison, Fiona A. ^{[8
]}

Kitaguchi, Takao ^{[9
]}

Kouveliotou, Chryssa ^{[10
]}

Madsen, Kristin K. ^{[8
]}

Markwardt, Craig B. ^{[11
]}

Stern, Daniel ^{[12
]}

Vogel, Julia K. ^{[7
]}

Zhang, William W. ^{[11
]}

机构：

[1] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada

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

[3] Univ Toulouse, UPS OMP, IRAP, Toulouse, France

[4] Inst Rech Astrophys & Planetol, CNRS, F-31028 Toulouse 4, France

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

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

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

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

[9] RIKEN, Wako, Saitama 3510198, Japan

[10] NASA, George C Marshall Space Flight Ctr, Space Sci Off, Huntsville, AL 35812 USA

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

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

来源：

ASTROPHYSICAL JOURNAL | 2013年 / 779卷 / 02期

基金：

加拿大自然科学与工程研究理事会;

关键词：

pulsars: individual (1E 1841-045); stars: magnetars; stars: neutron; X-RAY PULSAR; SOFT GAMMA-REPEATERS; HIGH-ENERGY CHARACTERISTICS; SWIFT J1822.3-1606; NEUTRON-STARS; XMM-NEWTON; 4U 0142+61; SPIN-DOWN; KES; 73; EMISSION;

D O I：

10.1088/0004-637X/779/2/163

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report new spectral and temporal observations of the magnetar 1E 1841-045 in the Kes 73 supernova remnant obtained with the Nuclear Spectroscopic Telescope Array. Combined with new Swift and archival XMM-Newton and Chandra observations, the phase-averaged spectrum is well characterized by a blackbody plus double power law, in agreement with previous multimission X-ray results. However, we are unable to reproduce the spectral results reported based on Suzaku observations. The pulsed fraction of the source is found to increase with photon energy. The measured rms pulsed fractions are similar to 12% and similar to 17% at similar to 20 and similar to 50 keV, respectively. We detect a new feature in the 24-35 keV band pulse profile that is uniquely double peaked. This feature may be associated with a possible absorption or emission feature in the phase-resolved spectrum. We fit the X-ray data using the recently developed electron-positron outflow model by Beloborodov for the hard X-ray emission from magnetars. This produces a satisfactory fit, allowing a constraint on the angle between the rotation and magnetic axes of the neutron star of similar to 20 degrees and on the angle between the rotation axis and line of sight of similar to 50 degrees. In this model, the soft X-ray component is inconsistent with a single blackbody; adding a second blackbody or a power-law component fits the data. The two-blackbody interpretation suggests a hot spot of temperature kT approximate to 0.9 keV occupying similar to 1% of the stellar surface.

引用

页数：9

共 45 条

[1] Resonant compton upscattering in Anomalous X-ray Pulsars [J].