Year: 2024
Type: article
Abstract: When a star dies, it can explode in a supernova, causing a strong shock wave and forming an interstellar object called a supernova remnant (SNR). Observational studies of SNRs allow us to learn about the different types of progenitors, the explosion mechanisms, the physics of interstellar shocks, and the matter cycle in galaxies. We report on the first detection of SNRs located on the outskirts of a galaxy; namely, the Large Magellanic Cloud (LMC), the largest satellite galaxy of our Galaxy. The sources were discovered ∼3° outside the main stellar and gas distribution of the LMC in the recent surveys in radio with the Australian Square Kilometre Array Pathfinder (ASKAP) and in X-rays with the extended Roentgen Survey with an Imaging Telescope Array (eROSITA). We studied them in follow-up observations with the X-ray Multi-Mirror Mission- Newton telescope and MeerKAT and confirmed them to be SNRs. Their progenitors are most likely stars that had left the LMC due to tidal interaction between the Magellanic Clouds and the Milky Way. SNR J0614-7251 is located in an environment with a similar density to those of the other known SNRs in the LMC, and has similar X-ray properties. SNR J0624-6948, on the other hand, is located in a region with a lower density, n 0 < 0.01 cm −3 . Its radio shell shows a spectral index and polarisation typical of an SNR.
Source: Astronomy and Astrophysics
Institutions: Western Sydney University, Gifu University, Max Planck Institute for Extraterrestrial Physics, National University of Ireland, Maynooth, Commonwealth Scientific and Industrial Research Organisation, Australia Telescope National Facility, Dominion Astrophysical Observatory, National Research Council Canada, Centre National de la Recherche Scientifique, Observatoire astronomique de Strasbourg, Université de Strasbourg, Cerro Tololo Inter-American Observatory, Friedrich-Alexander-Universität Erlangen-Nürnberg
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,732
Funders: National Aeronautics and Space Administration, Science and Industry Endowment Fund, Australian Government, Commonwealth Scientific and Industrial Research Organisation, National Research Foundation, University of Pretoria, Science Foundation Ireland, Deutsche Forschungsgemeinschaft, Irish Research Council, University of the Western Cape, Universiteit Stellenbosch, Cape Peninsula University of Technology, University of Cape Town, Government of Western Australia, Australian Research Council, Inter-University Institute for Data Intensive Astronomy
OpenAlex ID: W4405907281