Titanium and Iron in the Cassiopeia A Supernova Remnant

Mixing above the proto-neutron star is believed to play an important role in the supernova engine, and this mixing results in a supernova explosion with asymmetries. Elements produced in the innermost ejecta, e.g., \({}^{56}\)Ni and \({}^{44}\)Ti, provide a clean probe of this engine. The production...

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Bibliographic Details
Published in:arXiv.org 2020-05
Main Authors: Vance, Gregory S, Young, Patrick A, Fryer, Christopher L, Ellinger, Carola I
Format: Article
Language:English
Subjects:
Cassiopeia A
Ejecta
Gamma rays
Neutron stars
Supernova remnants
Supernovae
Three dimensional models
Titanium
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Summary:Mixing above the proto-neutron star is believed to play an important role in the supernova engine, and this mixing results in a supernova explosion with asymmetries. Elements produced in the innermost ejecta, e.g., \({}^{56}\)Ni and \({}^{44}\)Ti, provide a clean probe of this engine. The production of \({}^{44}\)Ti is particularly sensitive to the exact production pathway and, by understanding the available pathways, we can use \({}^{44}\)Ti to probe the supernova engine. Using thermodynamic trajectories from a three-dimensional supernova explosion model, we review the production of these elements and the structures expected to form under the "convective-engine" paradigm behind supernovae. We compare our results to recent X-ray and \(\gamma\)-ray observations of the Cassiopeia A supernova remnant.
ISSN:2331-8422
DOI:10.48550/arxiv.2005.03777