Suzaku observation of the Galactic supernova remnant CTB 37A (G348.5+0.1)

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

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, vol.417, no.2, pp.1387-1391, 2011 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 417 Issue: 2
  • Publication Date: 2011
  • Doi Number: 10.1111/j.1365-2966.2011.19357.x
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1387-1391
  • Keywords: ISM: individual objects: CTB 37A, ISM: supernova remnants, X-rays: ISM, X-RAY-EMISSION, ASCA OBSERVATIONS, 3C 391, PLASMAS, SHELL, W44, ABUNDANCES, EVOLUTION, DISCOVERY, SPECTRA
  • Middle East Technical University Affiliated: No


In this paper, we present the results of the observations of CTB 37A obtained with the X-ray imaging spectrometer onboard the Suzaku satellite. The X-ray spectrum of CTB 37A is fitted well by two components: a single-temperature ionization equilibrium component (VMEKAL), with solar abundances, an electron temperature of kTe similar to 0.6 keV and an absorbing column density of NH similar to 3 x 1022 cm-2, and a power-law component with a photon index of G similar to 1.6. The X-ray spectrum of CTB 37A is characterized by clearly detected K-shell emission lines of Mg, Si, S and Ar. The plasma with solar abundances supports the idea that the X-ray emission originates from the shocked interstellar material. The ambient gas density and the age of the remnant are estimated to be similar to 1f-1/2 cm-3 and similar to 3 x 104f1/2 yr, respectively. The centre-filling X-ray emission, surrounded by a shell-like radio structure, and other X-ray properties indicate that this remnant could be a new member of the class of mixed-morphology supernova remnants.