Deep radio characterization of the supernova remnant G343.1-00.7

Abstract

Supernova remnants (SNRs) are extended radio sources whose morphology and evolution are shaped by the interaction of strong shocks with the surrounding medium. We combined the 0.944 GHz Australian Square Kilometre Array Pathfinder (ASKAP) image from the Evolutionary Map of the Universe (EMU) survey with 0.088-0.200 GHz MWA-GLEAM data to characterize the integrated radio spectrum of G343.1−00.7 and perform its first sensitive spatially resolved spectral analysis. We derived an integrated spectral index of α=−0.50±0.01, confirming the previously reported value with improved accuracy. We redefined the radio morphology of the remnant, providing the first morphological and spectral evidence that filamentary structures overlapping the nearby \hii\ G343.147−00.44 are associated with the SNR. Local brightness-brightness analysis revealed flatter-spectrum filaments along the south-eastern shell, consistent with a possible thermal bremsstrahlung contribution from radiative or partially radiative shocks. Comparison with \hi\ and CO data identified gas components kinematically consistent with the SNR distance, although no clear morphological evidence of interaction was found. The gas distribution around the \hii\ suggests an expanding \hi\ shell partially embedded within its parent molecular cloud. Theoretical models place G343.1−00.7 between the late Sedov and early pressure-driven phases, suggesting different evolutionary stages across the remnant. These results highlight the potential of high-resolution ASKAP observations for spatially resolved studies of poorly characterized SNRs in complex Galactic environments.

Propagation Diagnostics of Supernova Remnant Environments around Young Repeating Fast Radio Bursts. I. Hydrodynamic Evolution of the Source-local Dispersion Measure
Xiang-Er Fang, Zhen-Yin Zhao, Yi-Qing Lin +2
The Astrophysical Journal30 Sep 2026Peer-reviewedCC BY 4.0Full textHigh-energy astrophysicsCrossref
Propagation Diagnostics of Supernova Remnant Environments around Young Repeating Fast Radio Bursts. I. Hydrodynamic Evolution of the Source-local Dispersion Measure
Xiang-Er Fang, Zhen-Yin Zhao, Yi-Qing Lin +2
arXiv30 Sep 2026PreprintCC BY 4.0Full textHigh-energy astrophysicsarXiv
A 44-min periodic radio transient in a supernova remnant
Di Li, Mao Yuan, Lin Wu +46
中国科学通报：英文版11 Jun 2026Peer-reviewedCC BY21 citedHigh-energy astrophysicsOpenAlex
A steadily declining dispersion measure for the repeating fast radio burst FRB 20220529A: Evidence for an FRB engine embedded in an expanding supernova remnant
Ayush Pandhi, Kenzie Nimmo, Shion Andrew +29
Astrophys.J.Lett.31 Aug 2026Peer-reviewedCC BY 4.0Full text6 citedHigh-energy astrophysicsHAL
Pulsar J1909+0749 and supernova remnant G42.1-0.2. A case of a pulsar that has exited the shell of its associated supernova remnant
R. Dokara, M. Kramer, A. Brunthaler +2
Astronomy & Astrophysics7 Nov 2026Peer-reviewedPublisher termsSolar & stellar physicsCrossref

Cite

BibTeX RIS

BibTeX

@misc{loru2026deep,
  title = {{Deep radio characterization of the supernova remnant G343.1-00.7}},
  author = {S. Loru and A. Ingallinera and C. Trigilio and G. Umana and D. Urošević and B. Arbutina and D. Leahy and C. Bordiu and F. Bufano and I. U. Aalia and C. Buemi and F. Cavallaro and E. Egron and M. D. Filipović and L. Heino and A. M. Hopkins and S. Lazarević and P. Leto and A. Pellizzoni and S. F. Rahman and S. Riggi and A. C. Ruggeri and T. Zafar},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2609.39731},
  eprint = {2609.39731},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.39731},
  note = {CC BY 4.0},
}

RIS

TY  - UNPB
TI  - Deep radio characterization of the supernova remnant G343.1-00.7
AU  - S. Loru
AU  - A. Ingallinera
AU  - C. Trigilio
AU  - G. Umana
AU  - D. Urošević
AU  - B. Arbutina
AU  - D. Leahy
AU  - C. Bordiu
AU  - F. Bufano
AU  - I. U. Aalia
AU  - C. Buemi
AU  - F. Cavallaro
AU  - E. Egron
AU  - M. D. Filipović
AU  - L. Heino
AU  - A. M. Hopkins
AU  - S. Lazarević
AU  - P. Leto
AU  - A. Pellizzoni
AU  - S. F. Rahman
AU  - S. Riggi
AU  - A. C. Ruggeri
AU  - T. Zafar
PY  - 2026
DA  - 2026/10/06
PB  - arXiv
DO  - 10.48550/arxiv.2609.39731
UR  - https://arxiv.org/abs/2609.39731
AB  - Supernova remnants (SNRs) are extended radio sources whose morphology and evolution are shaped by the interaction of strong shocks with the surrounding medium. We combined the 0.944 GHz Australian Square Kilometre Array Pathfinder (ASKAP) image from the Evolutionary Map of the Universe (EMU) survey with 0.088-0.200 GHz MWA-GLEAM data to characterize the integrated radio spectrum of G343.1−00.7 and perform its first sensitive spatially resolved spectral analysis. We derived an integrated spectral index of α=−0.50±0.01, confirming the previously reported value with improved accuracy. We redefined the radio morphology of the remnant, providing the first morphological and spectral evidence that filamentary structures overlapping the nearby \hii\ G343.147−00.44 are associated with the SNR. Local brightness-brightness analysis revealed flatter-spectrum filaments along the south-eastern shell, consistent with a possible thermal bremsstrahlung contribution from radiative or partially radiative shocks. Comparison with \hi\ and CO data identified gas components kinematically consistent with the SNR distance, although no clear morphological evidence of interaction was found. The gas distribution around the \hii\ suggests an expanding \hi\ shell partially embedded within its parent molecular cloud. Theoretical models place G343.1−00.7 between the late Sedov and early pressure-driven phases, suggesting different evolutionary stages across the remnant. These results highlight the potential of high-resolution ASKAP observations for spatially resolved studies of poorly characterized SNRs in complex Galactic environments.
ER  -

Abstract

Related

Cite