Asymmetry in The Observed Metal-Rich Ejecta of Galactic Type Ia Supernova Remnant G299.2-2.9

TL;DR

This study uses deep Chandra observations to analyze the metal-rich ejecta of the Galactic Type Ia supernova remnant G299.2-2.9, revealing asymmetries and inhomogeneous structures that suggest an asymmetric explosion or structured medium.

Contribution

First detailed imaging and spectral analysis of G299.2-2.9 revealing asymmetric ejecta distribution and abundance variations in a Type Ia supernova remnant.

Findings

Abundance ratios match delayed-detonation models.

Ejecta show inhomogeneous spatial and spectral structures.

Evidence of asymmetric explosion or structured medium.

Abstract

We have performed a deep Chandra observation of Galactic Type Ia supernova remnant G299.2-2.9. Here we report the initial results from our imaging and spectral analysis. The observed abundance ratios of the central ejecta are in good agreement with those predicted by delayed-detonation Type Ia supernovae models. We reveal inhomogeneous spatial and spectral structures of metal-rich ejecta in G299.2-2.9. The Fe/Si abundance ratio in the northern part of the central ejecta is higher than that in the southern part. An elongation of ejecta material extends out to the western outermost boundary of the remnant. In this western elongation, both the Si and Fe are enriched with a similar abundance ratio to that in the southern part of the central nebula. These structured distributions of metal-rich ejecta material suggest that this Type Ia supernova might have undergone a significantly asymmetric explosion and/or has been expanding into a structured medium.