The extended hard X-ray emission from the Vela Plerion
Abstract
We present the results of a broad band (3-200 keV) spectral analysis of BeppoSAX and XMM-Newton observations of the Vela plerion. The hard X-ray (> 15 keV) emission is found to be extended over a region of 12'-15' radius, corresponding to a size of about 1.0--1.3 pc for a source distance of 290 pc. A single power law does not give an acceptable fit while a broken power law or a log-parabolic law nicely fit the data. The former spectral model has the photon index Gamma_1 = 1.66 +/- 0.01 for energies lower than the break value equal to 12.5 keV and the index Gamma_2 = 2.01 +/- 0.05 up to about 200 keV. The total X-ray luminosity of the Vela plerionis L_X=5.5E+33 erg/s, which implies a conversion factor of the spin--down power of about 1.E-03.
Cite
@article{arxiv.astro-ph/0503261,
title = {The extended hard X-ray emission from the Vela Plerion},
author = {V. Mangano and E. Massaro and F. Bocchino and T. Mineo and G. Cusumano},
journal= {arXiv preprint arXiv:astro-ph/0503261},
year = {2015}
}
Comments
8 pages, 6 figures. Accepted for publication by Astronomy and Astrophysics