The Persistence of Memory, or How the X-Ray Spectrum of SNR 0509-67.5 Reveals the Brightness of its Parent Type Ia Supernova

TL;DR

This study links the brightness of a Type Ia supernova to its remnant's X-ray spectrum, estimating its explosion energy and confirming its origin as a bright, energetic event similar to SN 1991T.

Contribution

It provides the first detailed quantitative connection between a Type Ia supernova and its remnant using combined spectral and dynamical analysis.

Findings

Supernova remnant 0509-67.5 originated ~400 years ago.

Explosion had a kinetic energy of 1.4x10^51 erg.

Synthesized approximately 0.97 solar masses of 56Ni.

Abstract

We examine the dynamics and X-ray spectrum of the young Type Ia supernova remnant 0509-67.5 in the context of the recent results obtained from the optical spectroscopy of its light echo. Our goal is to estimate the kinetic energy of the supernova explosion using Chandra and XMM-Newton observations of the supernova remnant, thus placing the birth event of 0509-67.5 in the sequence of dim to bright Type Ia supernovae. We base our analysis on a standard grid of one-dimensional delayed detonation explosion models, together with hydrodynamic and X-ray spectral calculations of the supernova remnant evolution. From the remnant dynamics and the properties of the O, Si, S, and Fe emission in its X-ray spectrum we conclude that 0509-67.5 was originated ~400 years ago by a bright, highly energetic Type Ia explosion similar to SN 1991T. Our best model has a kinetic energy of 1.4x10E51 erg and synthesizes 0.97 Msun of 56Ni. These results are in excellent agreement with the age estimate and spectroscopy from the light echo. We have thus established the first connection between a Type Ia supernova and its supernova remnant based on a detailed quantitative analysis of both objects.