BeppoSAX observation of the composite remnant G327.1-1.1

Details BeppoSAX observation of the composite remnant G327.1-1.1 BeppoSAX observation of the composite remnant G327.1-1.1

2002-11-11

arxiv.org/abs/astro-ph/0211205v1

Astron.Astrophys. 398 (2003) 195-202

Astronomy and Astrophysics

Astrophysics

8 pages, 5 figures, full res version at http://www.astropa.unipa.it/Library/OAPA_preprints/h3891.ps.gz

Scientific paper

10.1051/0004-6361:20021650

We report an X-ray study of the composite supernova remnant G327.1-1.1, with particular emphasis on its thermal emission. By virtue of a combined spatial and spectral analysis, we have been able to model the X-ray emission of the remnant as a sum of two components: a non-thermal component, due to the pulsar nebula and the pulsar itself, and a thermal component, of which we have analysed spectrum and morphology, after proper subtraction of the plerion. We discuss three possible interpretations of the thermal emission of \src: pure Sedov expansion, expansion through a inhomogeneous medium with evaporation from ISM clouds, and radiative expansion. On the light of our new data and interpretation, we have re-derived all the physical parameters of this SNR. In the framework of Sedov or radiative expansion we derive a longer age than previously estimated ($1.1\times 10^4$), thus not requiring a high velocity for the pulsar.

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