Spatially resolved x-ray spectroscopy of vela shrapnel a
Mar, 200611 pages
Published in:
- Astrophys.J. 642 (2006) 917-922
e-Print:
- astro-ph/0603454 [astro-ph]
DOI:
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Abstract: (arXiv)
We present the detailed X-ray spectroscopy of Vela shrapnel A with the XMM-Newton satellite. Vela shrapnel A is one of several protrusions identified as bullets from Vela supernova explosion. The XMM-Newton image shows that shrapnel A consists of a bright knot and a faint trailing wake. We extracted spectra from various regions, finding a prominent Si Ly emission line in all the spectra. All the spectra are well represented by the non-equilibrium ionization (NEI) model. The abundances are estimated to be O0.3, Ne0.9, Mg0.8, Si3, Fe0.8 times their solar values. The non-solar abundance ratio between O and Si indicates that shrapnel A originates from a deep layer of a progenitor star. We found that the relative abundances between heavy elements are almost uniform in shrapnel A, which suggests that the ejecta from supernova explosion are well mixed with swept-up interstellar medium.- ISM: abundances
- ISM: individual (Vela supernova remnant)
- supernova remnants
- X-rays: ISM
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