Suzaku observations of ejecta-dominated Galactic supernova remnant G346.6-0.2

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Sezer A., GÖK F., Hudaverdi M., Kimura M., ERCAN E. N.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol.415, no.1, pp.301-305, 2011 (Peer-Reviewed Journal) identifier identifier

  • Publication Type: Article / Article
  • Volume: 415 Issue: 1
  • Publication Date: 2011
  • Doi Number: 10.1111/j.1365-2966.2011.18710.x
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.301-305
  • Keywords: ISM: individual objects: G346.6-0.2, ISM: supernova remnants, X-rays: ISM, X-RAY-EMISSION, SHELL, SHOCK, PLASMAS, NUCLEOSYNTHESIS, ACCELERATION, DISCOVERY, SPECTRA, RCW-86


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 Gamma similar to 0.6. An absorbing column density of N-H similar to 2.1 x 10(22) cm(-2) is obtained from the best fit, implying a high-density medium, high electron temperature of kT(e) similar to 1.2 keV and ionization time-scale of n(e)t similar to 2.9 x 10(11) 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.