DDp.2.34 — Mapping X-Ray Ejecta Distribution in the Galactic Core-Collapse SNR G292.0+1.8

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Aug 10th at 6:00 PM until 6:00 PM




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Author(s): Sangwook Park1, Jayant Bhalerao1, Andrew Schenck1

Institution(s): 1. University of Texas at Arlington

Based on our deep Chandra ACIS observation, we present the spatial distributions of individual elements of the shocked metal-rich ejecta in the textbook-type Galactic core-collapse supernova remnant G292.0+1.8 (G292). To separate the complex network of overabundant ejecta-dominated regions from low-abundant circumstellar regions, we apply our adaptive-mesh grid method to extract X-ray spectra from over 3000 sub-regions across G292, and perform various spectral model fits to individual regional spectra. Our initial results show highly asymmetric, differential spatial distributions for individual ejecta elements O, Ne, Mg, and Si. Gas temperature, pressure, and density also show substantially non-uniform distributions in G292. Implications from our initial results on the explosion asymmetry and the progenitor’s nature are briefly discussed.