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How to create Sgr A East. Where did the supernova explode?
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SYSNO ASEP 0568849 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title How to create Sgr A East. Where did the supernova explode? Author(s) Ehlerová, Soňa (ASU-R) RID, ORCID
Palouš, Jan (ASU-R) RID, ORCID
Morris, M. (US)
Wünsch, Richard (ASU-R) RID, ORCID
Barna, B. (HU)
Vermot, Pierre (ASU-R)Article number A124 Source Title Astronomy & Astrophysics. - : EDP Sciences - ISSN 0004-6361
Roč. 668, December (2022)Number of pages 12 s. Publication form Online - E Language eng - English Country FR - France Keywords astrophysics of galaxies ; supernova remnants ; galaxy center Subject RIV BN - Astronomy, Celestial Mechanics, Astrophysics OECD category Astronomy (including astrophysics,space science) R&D Projects GA19-15480S GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support ASU-R - RVO:67985815 UT WOS 000928210500003 EID SCOPUS 85145353674 DOI https://doi.org/10.1051/0004-6361/202244682 Annotation 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. Workplace Astronomical Institute Contact Anežka Melichárková, bibl@asu.cas.cz, Tel.: 323 620 326 Year of Publishing 2023 Electronic address https://hdl.handle.net/11104/0340111
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