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We present here the results of an X‐ray analysis of Galactic supernova remnant G 346.6− 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 G 346.6− 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   N  H ∼ 2.1 × 10 22  cm −2   is obtained from the best fit, implying a high‐density medium, high electron temperature of   kT  e ∼ 1.2 keV  and ionization time‐scale of   n  e  t ∼ 2.9 × 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.

Suzaku observations of ejecta‐dominated Galactic supernova remnant G 346.6− 0.2