X- and Gamma-ray Studies of Cas A: Exposing Core Collapse to the Core

Details X- and Gamma-ray Studies of Cas A: Exposing Core Collapse to the Core X- and Gamma-ray Studies of Cas A: Exposing Core Collapse to the Core

2003-10-17

arxiv.org/abs/astro-ph/0310518v1

New Astron.Rev. 48 (2004) 61-67

Astronomy and Astrophysics

Astrophysics

6 pages, 3 figures, to be published in New Astronomy Reviews (proceedings of the Workshop "Astronomy with Radioactivities IV a

Scientific paper

10.1016/j.newar.2003.11.008

In this review of X-ray and gamma-ray observations of Cas A, evidence is discussed that Cas A was a Type Ib supernova of a Wolf-Rayet star with a main sequence mass between 22-25 Msun, that exploded after stellar wind loss had reduced its mass to ~6 Msun. The observed kinematics and the high Ti-44 yield indicate that the supernova explosion was probably assymetric, with a kinetic energy of ~2x10^51 erg.

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