Study of the supernova remnant G18.95-1.1

Details Study of the supernova remnant G18.95-1.1 Study of the supernova remnant G18.95-1.1

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...197.8205h&link_type=abstract

American Astronomical Society, 197th AAS Meeting, #82.05; Bulletin of the American Astronomical Society, Vol. 32, p.1540

Astronomy and Astrophysics

Astrophysics

Scientific paper

We present an analysis of data from the Advanced Satellite for Cosmology and Astrophysics (ASCA) of the supernova remnant (SNR) G18.95-1.1. We find that G18.95-1.1 can be classified as ``thermal composite'', characterized by a thermal X-ray spectrum coupled with a centrally-bright morphology. The SNR total spectrum can be best described by a non-equilibrium ionization model with a temperature around 0.90 keV, and an ionization timescale around 1010 cm-3 s-1, associated with a column density around 1022 atoms cm-2. We've searched elemental abundance variation within the remnant and found marginal evidence for an over-abundance of magnesium and a depletion of sulfur. These findings are discussed in the context of SNR evolution. We find no evidence of high-energy emission. If possible, we will also present some preliminary XMM-Newton results on other SNR observations.

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