Discovery of Strong Radiative Recombination Continua from the Supernova Remnant G359.1-0.5
Abstract
We present the results of the Suzaku observation of a supernova remnant (SNR), G359.1-0.5 in the direction of the Galactic center region. No canonical plasma model, in either ionization equilibrium or under-ionization, can fit the spectrum. These model give bump-like data-residual at ~2.7 and ~3.5 keV. Strong radiative recombination continua can fit these bump-like residuals, and hence the plasma is likely in an over-ionized state. In fact, an over-ionized plasma model fit the over-all spectrum of this SNR. The ionization temperature (kTz = 0.77 keV) is significantly higher than the electron temperature (kTe = 0.29 keV). This highly over-ionized state reinforces us to revise the abundances from those estimated with the conventional plasma code.
- Publication:
-
10th International Symposium on Origin of Matter and Evolution of Galaxies: OMEG - 2010
- Pub Date:
- August 2010
- DOI:
- 10.1063/1.3485202
- Bibcode:
- 2010AIPC.1269..463O
- Keywords:
-
- supernova remnants;
- Galactic centre;
- interstellar matter;
- X-ray sources (astronomical);
- 98.58.Mj;
- 98.35.Jk;
- 98.58.Ca;
- 98.70.Qy;
- Supernova remnants;
- Galactic center bar circumnuclear matter and bulge;
- Interstellar dust grains;
- diffuse emission;
- infrared cirrus;
- X-ray sources;
- X-ray bursts