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The nature of the X-ray halo of the plerion G21.5–0.9 unveiled by XMM-Newton and Chandra
Astronomy and Astrophysics
The nature of the radio-quiet X-ray halo around the plerionic SNR G21.5-0.9 is under debate. On the basis of spatial and spectral analysis of a large Chandra and XMM-Newton dataset of this source, we have developed a self-consistent scenario which explains all the observational features. We found that the halo is composed by diffuse extended emission due to dust scattering of X-rays from the plerion, by a bright limb which traces particle acceleration in the fast forward shock of the remnant,doi:10.1051/0004-6361:20052870 fatcat:hgenps2cdfg6xpjqywb6anpdci