XMM-Newton view of swift J1834.9-0846 and its magnetar wind Nebula

Younes, G. and Kouveliotou, C. and Kargaltsev, O. and Pavlov, G. G. and Göğüş, Ersin and Wachter, S. (2012) XMM-Newton view of swift J1834.9-0846 and its magnetar wind Nebula. Astrophysical Journal, 757 (1). ISSN 0004-637X (Print) 1538-4357 (Online)

Full text not available from this repository. (Request a copy)


We report on the analysis of two XMM-Newton observations of the recently discovered soft gamma repeater Swift J1834.9-0846, taken in 2005 September and one month after the source went into outburst on 2011 August 7. We performed timing and spectral analyses on the point source as well as on the extended emission. We find that the source period is consistent with an extrapolation of the Chandra ephemeris reported earlier and the spectral properties remained constant. The source luminosity decreased to a level of 1.6 × 1034 erg s-1 following a decay trend of vpropt -0.5. Our spatial analysis of the source environment revealed the presence of two extended emission regions around the source. The first (region A) is a symmetric ring around the point source, starting at 25'' and extending to ~50''. We argue that region A is a dust scattering halo. The second (region B) has an asymmetrical shape extending between 50'' and 150'', and is detected both in the pre- and post-outburst data. We argue that this region is a possible magnetar wind nebula (MWN). The X-ray efficiency of the MWN with respect to the rotation energy loss is substantially higher than those of rotation-powered pulsars: \eta _X\equiv L_MWN,0.5{\scriptsize --8 \,keV}/\dot{E}_rot\approx 0.7. The higher efficiency points to a different energy source for the MWN of Swift J1834.9-0846, most likely bursting activity of the magnetar, powered by its high magnetic field, B = 1.4 × 1014 G.
Item Type: Article
Additional Information: Article Number: 39
Uncontrolled Keywords: stars: neutron; X-rays: individual (Swift J1834.9-0846); X-rays: ISM
Subjects: Q Science > QB Astronomy > QB460-466 Astrophysics
Divisions: Faculty of Engineering and Natural Sciences > Basic Sciences > Physics
Faculty of Engineering and Natural Sciences
Depositing User: Ersin Göğüş
Date Deposited: 26 Nov 2012 14:58
Last Modified: 31 Jul 2019 15:11
URI: https://research.sabanciuniv.edu/id/eprint/20416

Actions (login required)

View Item
View Item