X-Ray Observations of the W51 Complex with Suzaku
Abstract
We present a detailed analysis of the X-ray emission from the middle-aged supernova remnant W51C and star-forming region W51B with Suzaku. The soft X-ray emission from W51C is well represented by an optically thin thermal plasma in the non-equilibrium ionization state with a temperature of 0.7 keV. The elemental abundance of Mg is significantly higher than the solar value. We find no significant feature of an over-ionized plasma in W51C. The hard X-ray emission is spatially coincident with the molecular clouds associated with W51B, overlapping with W51C. The spectrum is represented by an optically thin thermal plasma with a temperature of 5 keV or a powerlaw model with a photon index of 2.2. The emission probably has diffuse nature since its luminosity of 1 erg s in the 0.5-10 keV band cannot be explained by the emission from point sources in this region. We discuss the possibility that the hard X-ray emission comes from stellar winds of OB stars in W51B or accelerated particles in W51C.
Keywords
Cite
@article{arxiv.1212.1993,
title = {X-Ray Observations of the W51 Complex with Suzaku},
author = {Yoshitaka Hanabata and Makoto Sawada and Hideaki Katagiri and Aya Bamba and Yasushi Fukazawa},
journal= {arXiv preprint arXiv:1212.1993},
year = {2015}
}
Comments
11 pages, 5 figures, accepted for publication in PASJ