2012ApJ...757...39Y


Query : 2012ApJ...757...39Y

2012ApJ...757...39Y - Astrophys. J., 757, 39 (2012/September-3)

XMM-Newton view of Swift J1834.9-0846 and its magnetar wind nebula.

YOUNES G., KOUVELIOTOU C., KARGALTSEV O., PAVLOV G.G., GOGUS E. and WACHTER S.

Abstract (from CDS):

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 1.6x1034 erg/s following a decay trend of ∝t –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: ηX ≡L_MWN, 0.5 - 8 keV_/ {dot}Erot ~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 = 1.4x1014 G.

Abstract Copyright:

Journal keyword(s): stars: neutron - X-rays: individual: Swift J1834.9-0846 - X-rays: ISM

Simbad objects: 11

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Number of rows : 11
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 M 1 SNR 05 34 31.94 +22 00 52.2           ~ 5814 4
2 PSR J1119-6127 Psr 11 19 14.30 -61 27 49.5           ~ 359 1
3 PSR J1550-5418 Psr 15 50 54.18 -54 18 23.9           ~ 364 1
4 PSR J1808-2024 Psr 18 08 39.32 -20 24 40.1           ~ 1159 2
5 AX J1809.8-1943 Psr 18 09 51.07 -19 43 51.8           ~ 410 0
6 PSR J1819-1458 Psr 18 19 34.173 -14 58 03.57           ~ 106 0
7 XMMU J183435.3-084443 X 18 34 35.32 -08 44 43.8           ~ 9 0
8 2MASS J18344263-0845018 NIR 18 34 42.631 -08 45 01.85           ~ 2 0
9 SNR G023.3-00.3 SNR 18 34 51.80 -08 44 38.2           ~ 200 0
10 SWIFT J1834.9-0846 N*? 18 34 52.768 -08 45 40.83           ~ 72 0
11 GBS 1900+14 gB 19 07 13 +09 19.6           ~ 811 0

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2021.12.06-17:58:23

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