The extended X-ray emission around RRAT J1819-1458
Abstract
We present new imaging and spectral analysis of the recently discovered extended X-ray emission around the high magnetic field rotating radio transient RRAT J1819-1458. We used two Chandra observations performed for this object in 2008 May 31 and 2011 May 28, respectively. The diffuse X-ray emission was detected with a significance of \sim19 sigma in the image obtained by combining the two observations. Neither long-term spectral nor timing variability have been observed from the source or the nebula. RRAT J1819-1458 shows an unusual high X-ray efficiency of L_x(0.3-5 keV)/Edot_{rot} \sim 0.15 at converting spin-down power into X-ray luminosity. The most favourable scenario for the origin of this extended X-ray emission is either a pulsar-wind nebula (PWN) or a scattering halo. A magnetically powered scenario for the extended emission is viable only in the case of a Compton nebula, while can be tentatively disfavoured in the case of synchrotron emission.
Keywords
Cite
@article{arxiv.1211.7340,
title = {The extended X-ray emission around RRAT J1819-1458},
author = {A. Camero-Arranz and N. Rea and N. Bucciantini and M. A. McLaughlin and P. Slane and B. M. Gaensler and D. F. Torres and L. Stella and E. de Oña and G. L. Israel and F. Camilo and A. Possenti},
journal= {arXiv preprint arXiv:1211.7340},
year = {2015}
}
Comments
8 pages, 8 figures. Accepted 2012 November 28. Received 2012 October 8