ASYMMETRY IN THE OBSERVED METAL-RICH EJECTA OF THE GALACTIC TYPE IA SUPERNOVA REMNANT G299.2-2.9

作者：Post Seth^*; Park Sangwook; Badenes Carles; Burrows David N; Hughes John P; Lee Jae Joon; Mori Koji; Slane Patrick O

来源：Astrophysical Journal Letters, 2014, 792(1): L20.

DOI：10.1088/2041-8205/792/1/L20

• ISM: individual objects (G299.2-2.9 supernova remnant)
• ISM: supernova remnants
• X-rays: ISM

We have performed a deep Chandra observation of the 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 region is higher than that in the southern part. A significant continuous 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 ejecta region. 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.

• 出版日期2014-9-1
• 单位rutgers