Suzaku analysis of the supernova remnant G306.3−0.9 and the gamma-ray view of its neighbourhood. Issue 3 (23rd December 2016)

• Record Type: Journal Article
• Authors: Sezer, A.; Ergin, T.; Yamazaki, R.
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 466:Issue 3(2017)
• Page Start: 3434
• Page End: 3441
• Publication Date: 2016-12-23
• Subjects: ISM: individual objects: G306.3−0.9 -- ISM: supernova remnants -- gamma-rays: ISM -- X-rays: ISM; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/stw3331
• Languages: English
• ISSNs: 0035-8711

Abstract

Abstract: We present an investigation of the supernova remnant (SNR) G306.3−0.9, using archival multiwavelength data. The Suzaku spectra are well described by two-component thermal plasma models: the soft component is in ionization equilibrium and has a temperature ∼0.59 keV, while the hard component has temperature ∼3.2 keV and ionization time-scale ∼2.6 × 10 10 cm −3 s. We clearly detected Fe K-shell line at energy of ∼6.5 keV from this remnant. The overabundances of Si, S, Ar, Ca and Fe confirm that the X-ray emission has an ejecta origin. The centroid energy of the Fe K line supports that G306.3−0.9 is a remnant of a Type Ia supernova (SN) rather than a core-collapse SN. The GeV gamma-ray emission from G306.3−0.9 and its surrounding were analysed using about 6-yr of Fermi data. We report about the non-detection of G306.3−0.9 and the detection of a new extended gamma-ray source in the south-west of G306.3−0.9 with significance of ∼13σ. We discuss several scenarios for these results with the help of data from other wavebands to understand the SNR and its neighbourhood.