EMU detection of a large and low surface brightness Galactic SNR G288.8-6.3

Miroslav D. Filipovic, Shi Dai, B. Arbutina, N. Hurley-Walker, R. Brose, W. Becker, H. Sano, D. Urošević, T. H. Jarrett, Andrew M. Hopkins, Rami Z. E. Alsaberi, R. Alsulami, C. Bordiu, B. Ball, F. Bufano, C. Burger-Scheidlin, Evan Crawford, J. English, F. Haberl, A. IngallineraA. D. Kapinska, P. J. Kavanagh, Barbel S. Koribalski, R. Kothes, S. Lazarević, J. Mackey, G. Rowell, D. Leahy, S. Loru, Peter J. Macgregor, L. Nicastro, Ray P. Norris, S. Riggi, M. Sasaki, Milorad Stupar, C. Trigilio, G. Umana, T. Vernstrom, B. Vukotić

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

We present the serendipitous detection of a new Galactic supernova remnant (SNR), G288.8-6.3, using data from the Australian Square Kilometre Array Pathfinder (ASKAP) Evolutionary Map of the Universe (EMU) survey. Using multifrequency analysis, we confirm this object as an evolved Galactic SNR at high Galactic latitude with low radio surface brightness and typical SNR spectral index of α = − 0.41 ± 0.12. To determine the magnetic field strength in SNR G288.8-6.3, we present the first derivation of the equipartition formulae for SNRs with spectral indices α > − 0.5. The angular size is 1.°8 × 1.°6 (107.′6 × 98.′4), and we estimate that its intrinsic size is ∼40 pc, which implies a distance of ∼1.3 kpc and a position of ∼140 pc above the Galactic plane. This is one of the largest in angular size and closest Galactic SNRs. Given its low radio surface brightness, we suggest that it is about 13,000 yr old.

Original languageEnglish
Article number149
Number of pages11
JournalThe Astronomical Journal
Volume166
Issue number4
Publication statusPublished - 1 Oct 2023

Bibliographical note

Publisher Copyright:
© 2023. The Author(s). Published by the American Astronomical Society.

Open Access - Access Right Statement

Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence (https://creativecommons.org/licenses/by/4.0/). Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

Fingerprint

Dive into the research topics of 'EMU detection of a large and low surface brightness Galactic SNR G288.8-6.3'. Together they form a unique fingerprint.

Cite this