Suzaku Observation of G359.79-0.26, a New Supernova Remnant Candidate in the Galactic Center

Details Suzaku Observation of G359.79-0.26, a New Supernova Remnant Candidate in the Galactic Center Suzaku Observation of G359.79-0.26, a New Supernova Remnant Candidate in the Galactic Center

Jan 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008pasj...60s.183m&link_type=abstract

Publications of the Astronomical Society of Japan, Vol.60, No.SP1, pp.S183--S190

Astronomy and Astrophysics

Astronomy

11

Galaxy: Center, Ism: Individual (G359.79-0.26), Ism: Supernova Remnants, X-Rays: Ism

Scientific paper

Utilizing Suzaku observations, we obtained the X-ray spectrum of G359.79-0.26, an extended X-ray feature nearby the Galactic center (GC) supernova remnant (SNR) SgrA East. We estimated the contribution from the Galactic center diffuse X-rays, which allows us a proper background subtraction from the faint extended source. A thin thermal plasma with a temperature of kTe ˜ 1keV and slightly enhanced metal abundances (S and Ar) are required to reproduce the G359.79-0.26 spectrum. The absorption column density NH ˜ 4 × 1022 cm-2) associated with the plasma indicates that G359.79-0.26 is located in the GC. The thermal energy of the plasma is estimated to be 1.7 × 1050erg, typical for galactic SNRs. Its center-filling X-ray emission surrounded by a shell-like radio structure suggests that G359.79-0.26 would be a new member of the mixed-morphology SNR class. The 2.45keV mosaic image covering a ˜ 40' × 40' GC field implies an alternative possibility that G359.79-0.26 might be a part of a large ring-like structure with a size of 18' × 16'.

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