Detection of thermal X-ray emission in the halo of the plerionic supernova remnant G21.5-0.9 |
| |
| Affiliation: | 1. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street MS-70, Cambridge, MA 02138, USA;2. Jansky Fellow, National Radio Astronomy Observatory, and Harvard-Smithsonian Center for Astrophysics, 60 Garden Street MS-70, Cambridge, MA 02138, USA |
| |
| Abstract: | The detection of a soft thermal X-ray component in the spectrum of a bright knot in the halo of the plerion G21.5-0.9 is reported. Using a collisional ionization equilibrium model for an hot optically thin plasma, a temperature of kT 0.12–0.24 keV, a mass of 0.3–1.0 M⊙ and a density of 1.6–6 cm−3 is derived. The spectral analysis suggests a possible overabundance of Silicon with respect to the solar value in the knot; if this will be confirmed this object may be a clump of shocked ejecta. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
