Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011head...12.3424g&link_type=abstract
American Astronomical Society, HEAD meeting #12, #34.24
Astronomy and Astrophysics
Astronomy
Scientific paper
The Vela Supernova Remnant (SNR) is one of the nearest SNRs, subtending more than 8 degrees on the sky. Its environment is complex: the remnant is bright, soft, and sharply defined to the east and north, but much fainter and less well ordered in the west and south. Age estimates for the associated pulsar range from 11400 years to as much as 18000 years, making the the SNR a moderately old remnant. The discovery of protrusions beyond the projected rim suggested that these protrusions could be ejecta fragments (Aschenbach et al. 1995, Nature 373, 587), and subsequent X-ray observations by a number of workers confirmed enhanced abundances in a number of these fragments. We will present analyses of several ejecta fragments based on XMM-Newton and Suzaku X-ray observations. This will include an examination of the composition, morphology, structure of Vela Fragment ``D'', the largest and brightest of the fragments, and explore the possibility that the fragment consists of several components.
This work was supported by NASA grants NNX06AE40G, NNX07AF67G, NNX08AZ74G, and by NASA contract NAS8-03060.
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