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Low-frequency radio absorption in Cassiopeia A

Arias, M.; Vink, J.; de Gasperin, Francesco; Salas, P.; Oonk, J. B. R.; van Weeren, R. J.; van Amesfoort, A. S.; Anderson, J. M.; Beck, Rainer; Bell, M. E.; Butcher, Harvey

Description

Context. Cassiopeia A is one of the best-studied supernova remnants. Its bright radio and X-ray emission is due to shocked ejecta. Cas A is rather unique in that the unshocked ejecta can also be studied: through emission in the infrared, the radio-active decay of 44Ti, and the low-frequency free-free absorption caused by cold ionised gas, which is the topic of this paper. Aims. Free-free absorption processes are affected by the mass, geometry, temperature, and ionisation conditions in the...[Show more]

CollectionsANU Research Publications
Date published: 2018-05-08
Type: Journal article
URI: http://hdl.handle.net/1885/197171
Source: Astronomy and Astrophysics
DOI: 10.1051/0004-6361/201732411
Access Rights: Open Access

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