Lin, Lin and Göğüş, Ersin and Güver, Tolga and Kouveliotou, Chryssa (2012) On the X-ray emission mechanisms of the persistent source and very low-fluence bursts of SGR J0501+4516. Astrophysical Journal, 761 (2). ISSN 0004-637X (Print) 1538-4357 (Online)
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Official URL: http://dx.doi.org/10.1088/0004-637X/761/2/132
Abstract
We present here a detailed spectral study of the X-ray emission of the persistent source and the low-fluence bursts of SGR J0501+4516 observed during a deep XMM-Newton observation near the peak of its 2008 outburst. For the persistent emission we employ a physically motivated continuum emission model and spectroscopically determine important source properties; such as, the surface magnetic field strength and the magnetospheric scattering optical depth. We find that the magnetar surface temperature near the peak of its activity is 0.38 keV, corresponding to an emission area of 131 km^2 at a distance of 2 kpc. The surface magnetic field strength determined spectroscopically, B=2.2E14 G, is consistent with the dipole field strength inferred from the source spin and spin down rate. We fit the stacked spectra of 129 very faint bursts with a modified blackbody model and find a temperature of 1.16 keV, corresponding to an emission area of 93 km^2. We also find an evidence for cooling during the burst decay phase.
| Item Type: | Article |
|---|---|
| Additional Information: | Article Number: 132 |
| Uncontrolled Keywords: | pulsars: individual (SGR J0501+4516); stars: neutron; X-rays: bursts |
| Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
| Divisions: | Faculty of Engineering and Natural Sciences > Basic Sciences > Physics Faculty of Engineering and Natural Sciences |
| Depositing User: | Tolga Güver |
| Date Deposited: | 02 Jul 2013 16:23 |
| Last Modified: | 01 Aug 2019 10:36 |
| URI: | https://research.sabanciuniv.edu/id/eprint/21661 |
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On the X-ray emission mechanisms of the persistent source and very low-fluence bursts of SGR J0501+4516. (deposited 01 Dec 2012 22:37)
- On the X-ray emission mechanisms of the persistent source and very low-fluence bursts of SGR J0501+4516. (deposited 02 Jul 2013 16:23) [Currently Displayed]
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