Ejecta detection in the middle-aged Galactic supernova remnant G296.1−0.5 observed with Suzaku

Authors

  • F. Gök,

    Corresponding author
    1. Department of Physics, Faculty of Sciences, Akdeniz University, Antalya 07058, Turkey
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  • A. Sezer

    Corresponding author
    1. TÜBİTAK Space Technologies Research Institute, ODTU Campus, Ankara 06531, Turkey
    2. Department of Physics, Faculty of Art and Sciences, Bog̃aziinline imagei University, İstanbul 34342, Turkey
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E-mail: gok@akdeniz.edu.tr (FG); aytap.sezer@uzay.tubitak.gov.tr (AS)

ABSTRACT

In this paper, we report the detection of ejecta in the middle-aged Galactic supernova remnant G296.1−0.5 with the X-ray Imaging Spectrometer onboard the Suzaku satellite. The spectra of three lobes, north, south-east and south-west and interlobe regions, consist of soft (0.3–2.0 keV) emission originated from non-equilibrium ionization plasma. In north, south-east and interlobe regions, the thermal emission can be represented by a one-component non-equilibrium ionization (VNEI) model, in south-west region it can be represented by two-component VNEI model. The spectra of studied regions have lines of N, O, Ne, Mg and Si elements. Si emission from this remnant is shown for the first time in this work. Enhanced abundances of Ne, Mg and Si elements obtained show the ejecta contribution in all regions. Assuming that the remnant is in Sedov phase, we obtained ambient density n0∼ 0.45 cm−3, age t ∼ 2.8 × 104 yr, shock velocity Vs∼ 320 km s−1, shock temperature Ts∼ 1.2 × 106 K and swept-up mass Msw∼ 340 M at an adopted distance of d= 3 kpc.

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