Journal Article

<i>Suzaku</i> observations of ejecta-dominated Galactic supernova remnant G346.6−0.2

A. Sezer, F. Gök, M. Hudaverdi, M. Kimura and E. N. Ercan

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 415, issue 1, pages 301-305
Published in print July 2011 | ISSN: 0035-8711
Published online July 2011 | e-ISSN: 1365-2966 | DOI:
Suzaku observations of ejecta-dominated Galactic supernova remnant G346.6−0.2

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We present here the results of an X-ray analysis of Galactic supernova remnant G346.6−0.2 observed with Suzaku. K-shell emission lines of Mg, Si, S, Ca and Fe are detected clearly for the first time. Strong emission lines of Si and S imply that the X-ray emission nature of G346.6−0.2 is ejecta-dominated. The ejecta-dominated emission is well fitted by a combined model consisting of a thermal plasma in non-equilibrium ionization and a non-thermal component, which can be regarded as synchrotron emission with a photon index of Γ∼ 0.6. An absorbing column density of NH∼ 2.1 × 1022 cm−2 is obtained from the best fit, implying a high-density medium, high electron temperature of kTe∼ 1.2 keV and ionization time-scale of net∼ 2.9 × 1011 cm−3 s, indicating that this remnant may be far from full ionization equilibrium. The relative abundances from the ejecta show that the remnant originates from a Type Ia supernova explosion.

Keywords: ISM: individual objects: G346.6−0.2; ISM: supernova remnants; X-rays: ISM

Journal Article.  3515 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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