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 language | English |
|---|---|
| Article number | 149 |
| Journal | Astronomical Journal |
| Volume | 166 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 1 Oct 2023 |
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In: Astronomical Journal, Vol. 166, No. 4, 149, 01.10.2023.
Research output: Contribution to journal › Article › peer-review
TY - JOUR
T1 - EMU Detection of a Large and Low Surface Brightness Galactic SNR G288.8-6.3
AU - Filipović, Miroslav D.
AU - Dai, Shi
AU - Arbutina, Bojan
AU - Hurley-Walker, Natasha
AU - Brose, Robert
AU - Becker, Werner
AU - Sano, Hidetoshi
AU - Urošević, Dejan
AU - Jarrett, T. H.
AU - Hopkins, Andrew M.
AU - Alsaberi, Rami Z.E.
AU - Alsulami, R.
AU - Bordiu, Cristobal
AU - Ball, Brianna
AU - Bufano, Filomena
AU - Burger-Scheidlin, Christopher
AU - Crawford, Evan
AU - English, Jayanne
AU - Haberl, Frank
AU - Ingallinera, Adriano
AU - Kapinska, Anna D.
AU - Kavanagh, Patrick J.
AU - Koribalski, Bärbel S.
AU - Kothes, Roland
AU - Lazarević, Sanja
AU - Mackey, Jonathan
AU - Rowell, Gavin
AU - Leahy, Denis
AU - Loru, Sara
AU - Macgregor, Peter J.
AU - Nicastro, Luciano
AU - Norris, Ray P.
AU - Riggi, Simone
AU - Sasaki, Manami
AU - Stupar, Milorad
AU - Trigilio, Corrado
AU - Umana, Grazia
AU - Vernstrom, Tessa
AU - Vukotić, Branislav
N1 - Funding Information: This scientific work uses data obtained from Inyarrimanha Ilgari Bundara / the Murchison Radio-astronomy Observatory. We acknowledge the Wajarri Yamaji People as the Traditional Owners and native title holders of the Observatory site. The Australian Commonwealth Scientific and Industrial Research Organisation's (CSIRO) ASKAP radio telescope is part of the Australia Telescope National Facility. 3131 https://ror.org/05qajvd42 Operation of ASKAP is funded by the Australian Government with support from the National Collaborative Research Infrastructure Strategy. ASKAP uses the resources of the Pawsey Supercomputing Research Centre. Establishment of ASKAP, Inyarrimanha Ilgari Bundara, the CSIRO Murchison Radio-astronomy Observatory, and the Pawsey Supercomputing Research Centre are initiatives of the Australian Government, with support from the Government of Western Australia and the Science and Industry Endowment Fund. eROSITA is the soft X-ray instrument aboard SRG, a joint Russian-German science mission supported by the Russian Space Agency (Roskosmos), in the interests of the Russian Academy of Sciences represented by its Space Research Institute (IKI), and the Deutsches Zentrum für Luft- und Raumfahrt (DLR). The SRG spacecraft was built by Lavochkin Association (NPOL) and its subcontractors and is operated by NPOL with support from IKI and the Max Planck Institute for Extraterrestrial Physics (MPE). The development and construction of the eROSITA X-ray instrument was led by MPE, with contributions from the Dr. Karl Remeis Observatory Bamberg & ECAP (FAU Erlangen-Nürnberg), the University of Hamburg Observatory, the Leibniz Institute for Astrophysics Potsdam (AIP), and the Institute for Astronomy and Astrophysics of the University of Tübingen, with the support of DLR and the Max Planck Society. The Argelander Institute for Astronomy of the University of Bonn and the Ludwig Maximilians Universität Munich also participated in the science preparation for eROSITA. The eROSITA data shown here were processed using the eSASS/NRTA software system developed by the German eROSITA consortium. M.D.F., G.R., and S.L. acknowledge Australian Research Council (ARC) funding through grant DP200100784. N.H.-W. is the recipient of ARC Future Fellowship project No. FT190100231. S.D. is the recipient of an ARC Discovery Early Career Award (DE210101738) funded by the Australian Government. H.S. acknowledges funding from JSPS KAKENHI grant No. 21H01136. D.U. and B.A. acknowledge the financial support provided by the Ministry of Science, Technological Development and Innovation of the Republic of Serbia through contract 451-03-47/2023-01/200104, as well as support through the joint project of the Serbian Academy of Sciences and Arts and Bulgarian Academy of Sciences on the detection of Galactic and extragalactic SNRs and H ii regions. R.B. acknowledges funding from the Irish Research Council under the Government of Ireland Postdoctoral Fellowship program. J.M. acknowledges support from a Royal Society-Science Foundation Ireland University Research Fellowship (20/RS-URF-R/3712). C.B.-S. acknowledges support from a Royal Society Research Fellows Enhancement Award 2021 (22/RS-EA/3810). B.V. is funded by the Ministry of Education, Science and Technological Development of the Republic of Serbia through contract No. 451-03-47/2023-01/200002. P.J.K. acknowledges support from the Science Foundation Ireland/Irish Research Council Pathway program under grant No. 21/PATH-S/9360. We thank an anonymous referee for comments and suggestions that greatly improved our paper. Funding Information: Future in-depth polarimetric and multifrequency studies will enhance our knowledge of this large angular size Galactic object. Finally, given ASKAP's sensitivity to low surface brightness emission, we anticipate many more similar discoveries as the EMU survey progresses. Acknowledgments Operation of ASKAP is funded by the Australian Government with support from the National Collaborative Research Infrastructure Strategy. ASKAP uses the resources of the Pawsey Supercomputing Research Centre. Establishment of ASKAP, Inyarrimanha Ilgari Bundara, the CSIRO Murchison Radio-astronomy Observatory, and the Pawsey Supercomputing Research Centre are initiatives of the Australian Government, with support from the Government of Western Australia and the Science and Industry Endowment Fund. eROSITA is the soft X-ray instrument aboard SRG, a joint Russian-German science mission supported by the Russian Space Agency (Roskosmos), in the interests of the Russian Academy of Sciences represented by its Space Research Institute (IKI), and the Deutsches Zentrum für Luft- und Raumfahrt (DLR). The SRG spacecraft was built by Lavochkin Association (NPOL) and its subcontractors and is operated by NPOL with support from IKI and the Max Planck Institute for Extraterrestrial Physics (MPE). The development and construction of the eROSITA X-ray instrument was led by MPE, with contributions from the Dr. Karl Remeis Observatory Bamberg & ECAP (FAU Erlangen-Nürnberg), the University of Hamburg Observatory, the Leibniz Institute for Astrophysics Potsdam (AIP), and the Institute for Astronomy and Astrophysics of the University of Tübingen, with the support of DLR and the Max Planck Society. The Argelander Institute for Astronomy of the University of Bonn and the Ludwig Maximilians Universität Munich also participated in the science preparation for eROSITA. The eROSITA data shown here were processed using the eSASS/NRTA software system developed by the German eROSITA consortium. M.D.F., G.R., and S.L. acknowledge Australian Research Council (ARC) funding through grant DP200100784. N.H.-W. is the recipient of ARC Future Fellowship project No. FT190100231. S.D. is the recipient of an ARC Discovery Early Career Award (DE210101738) funded by the Australian Government. H.S. acknowledges funding from JSPS KAKENHI grant No. 21H01136. D.U. and B.A. acknowledge the financial support provided by the Ministry of Science, Technological Development and Innovation of the Republic of Serbia through contract 451-03-47/2023-01/200104, as well as support through the joint project of the Serbian Academy of Sciences and Arts and Bulgarian Academy of Sciences on the detection of Galactic and extragalactic SNRs and H ii regions. R.B. acknowledges funding from the Irish Research Council under the Government of Ireland Postdoctoral Fellowship program. J.M. acknowledges support from a Royal Society-Science Foundation Ireland University Research Fellowship (20/RS-URF-R/3712). C.B.-S. acknowledges support from a Royal Society Research Fellows Enhancement Award 2021 (22/RS-EA/3810). B.V. is funded by the Ministry of Education, Science and Technological Development of the Republic of Serbia through contract No. 451-03-47/2023-01/200002. P.J.K. acknowledges support from the Science Foundation Ireland/Irish Research Council Pathway program under grant No. 21/PATH-S/9360. We thank an anonymous referee for comments and suggestions that greatly improved our paper. Publisher Copyright: © 2023. The Author(s). Published by the American Astronomical Society.
PY - 2023/10/1
Y1 - 2023/10/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85170674585&partnerID=8YFLogxK
U2 - 10.3847/1538-3881/acf19c
DO - 10.3847/1538-3881/acf19c
M3 - Article
AN - SCOPUS:85170674585
SN - 0004-6256
VL - 166
JO - Astronomical Journal
JF - Astronomical Journal
IS - 4
M1 - 149
ER -