Journal Article

<i>Suzaku</i> study of the centrally brightened supernova remnant G272.2−3.2

A. Sezer and F. Gök

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 421, issue 4, pages 3538-3542
Published in print April 2012 | ISSN: 0035-8711
Published online April 2012 | e-ISSN: 1365-2966 | DOI:
Suzaku study of the centrally brightened supernova remnant G272.2−3.2

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In this paper, we present the results from a Suzaku observation of the Galactic supernova remnant G272.2−3.2. The spectra of G272.2−3.2 are well fitted by a single‐temperature variable abundance non‐equilibrium ionization (VNEI) model with an electron temperature kTe∼ 0.77 keV, an ionization time‐scale τ∼ 6.5 × 1010 cm−3 s and an absorbing column density NH∼ 1.1 × 1022 cm−2. We have detected enhanced abundances of Si, S, Ca, Fe and Ni in the centre region, indicating that the X‐ray emission has an ejecta origin. We estimate that the electron density is ne∼ 0.48f−1/2 cm−3, the age is ∼4300f1/2 yr and the X‐ray total mass is Mx= 475f1/2 M by taking the distance to be d= 10 kpc. To understand the origin of the centrally peaked X‐ray emission of the remnant, we have studied the radial variations of the electron temperature and surface brightness. The relative abundances in the centre region suggest that G272.2−3.2 is the result of a Type Ia supernova explosion.

Keywords: ISM: individual objects: G272.2−3.2; ISM: supernova remnants; X‐rays: ISM

Journal Article.  2826 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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