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Title:
BeppoSAX observation of the composite remnant G327.1-1.1
Authors:
Bocchino, F.; Bandiera, R.
Affiliation:
AA(Osservatorio Astronomico di Palermo, Piazza del Parlamento 1, 90134 Palermo, Italy), AB(Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy)
Publication:
Astronomy and Astrophysics, v.398, p.195-202 (2003) (A&A Homepage)
Publication Date:
01/2003
Origin:
A&A
A&A Keywords:
acceleration of particles, radiation mechanisms: non-thermal, ISM: clouds, ISM: individual objects: G327.1-1.1, ISM: supernova remnants
DOI:
10.1051/0004-6361:20021650
Bibliographic Code:
2003A&A...398..195B

Abstract

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 G327.1-1.1: 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 (1.1x 104 yr), thus not requiring a high velocity for the pulsar.
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