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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2401.17294 |
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| _version_ | 1866916439247552512 |
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| author | Mantovanini, S. Becker, W. Khokhriakova, A. Hurley-Walker, N. Anderson, G. E. Nicastro, L. |
| author_facet | Mantovanini, S. Becker, W. Khokhriakova, A. Hurley-Walker, N. Anderson, G. E. Nicastro, L. |
| contents | G321.3-3.9 was first identified as a partial shell at radio frequencies a few decades ago. Although it continued to be observed, no additional studies were undertaken until recently. In this paper we present results from a large selection of radio and X-ray data that cover the position of G321.3-3.9. We confirmed G321.3-3.9 as a new supernova remnant (SNR) using data collected by several radio surveys, spanning a frequency range from 200 to 2300 MHz. Stacked eROSITA data from four consecutive all-sky surveys (eRASS:4) provide spectro-imaging information in the energy band 0.2 - 8.0 keV. G321.3-3.9 has an elliptical shape with major and minor axes of approximately 1.7 deg x 1.1 deg. From CHIPASS and S-PASS data, we calculate a spectral index α = -0.8 +- 0.2, consistent with synchrotron emission from an expanding shell in the radiative phase. The eROSITA data show an X-ray diffuse structure filling almost the entire radio shell. Based on our spectral analysis, we found the temperature to be approximately 0.6 keV and the column absorption density about 10^21 cm^-2. Comparing this absorption density to optical extinction maps, we estimated the distance to fall within the range of (1.0 - 1.7) kpc, considering the 1σ uncertainty range. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_17294 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | G321.3-3.9: A new supernova remnant observed with multi-band radio data and in the SRG/eROSITA All-Sky Surveys Mantovanini, S. Becker, W. Khokhriakova, A. Hurley-Walker, N. Anderson, G. E. Nicastro, L. High Energy Astrophysical Phenomena G321.3-3.9 was first identified as a partial shell at radio frequencies a few decades ago. Although it continued to be observed, no additional studies were undertaken until recently. In this paper we present results from a large selection of radio and X-ray data that cover the position of G321.3-3.9. We confirmed G321.3-3.9 as a new supernova remnant (SNR) using data collected by several radio surveys, spanning a frequency range from 200 to 2300 MHz. Stacked eROSITA data from four consecutive all-sky surveys (eRASS:4) provide spectro-imaging information in the energy band 0.2 - 8.0 keV. G321.3-3.9 has an elliptical shape with major and minor axes of approximately 1.7 deg x 1.1 deg. From CHIPASS and S-PASS data, we calculate a spectral index α = -0.8 +- 0.2, consistent with synchrotron emission from an expanding shell in the radiative phase. The eROSITA data show an X-ray diffuse structure filling almost the entire radio shell. Based on our spectral analysis, we found the temperature to be approximately 0.6 keV and the column absorption density about 10^21 cm^-2. Comparing this absorption density to optical extinction maps, we estimated the distance to fall within the range of (1.0 - 1.7) kpc, considering the 1σ uncertainty range. |
| title | G321.3-3.9: A new supernova remnant observed with multi-band radio data and in the SRG/eROSITA All-Sky Surveys |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2401.17294 |