How to create Sgr A East: Where did the supernova explode?
In: A&A 668, A124 (2022); (2022)
Online
report
Sgr A East is the supernova remnant closest to the centre of the Milky Way. Its age has been estimated to be either very young, around 1-2 kyr, or about 10 kyr, and its exact origin remains unclear. We aspire to create a simple model of a supernova explosion that reproduces the shape, size, and location of Sgr A East. Using a simplified hydrodynamical code, we simulated the evolution of a supernova remnant in the medium around the Galactic centre. The latter consists of a nearby massive molecular cloud with which Sgr A East is known to be interacting and a wind from the nuclear star cluster. Our preferred models of the Sgr A East remnant are compatible with an age of around 10 kyr. We also find suitable solutions for older ages, but not for ages younger than 5 kyr. Our simulations predict that the supernova exploded at a distance of about 3.5 pc from the Galactic centre, below the Galactic plane, slightly eastwards from the centre and 3 pc behind it.
Comment: 13 pages, 15 figures, accepted by A&A
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How to create Sgr A East: Where did the supernova explode?
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Autor/in / Beteiligte Person: | Ehlerová, S. ; Palouš, J. ; Morris, M. R. ; unsch, R. W\" ; Barna, B. ; Vermot, P. |
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Quelle: | A&A 668, A124 (2022); (2022) |
Veröffentlichung: | 2022 |
Medientyp: | report |
DOI: | 10.1051/0004-6361/202244682 |
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