FAST Polarization Mapping of the Supernova Remnant VRO 42.05.01
We have obtained the polarization data cube of the supernova remnant (SNR) VRO 42.05.01 at 1240 MHz using the Five-hundred-meter Aperture Spherical Radio Telescope (FAST). Three-dimensional Faraday synthesis is applied to the FAST data to derive the Faraday depth spectrum. The peak Faraday depth map...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2023-01-01
|
| Series: | The Astrophysical Journal |
| Subjects: | |
| Online Access: | https://doi.org/10.3847/1538-4357/acdb6a |
| _version_ | 1827825949347938304 |
|---|---|
| author | Li Xiao Ming Zhu Xiao-Hui Sun Peng Jiang Chun Sun |
| author_facet | Li Xiao Ming Zhu Xiao-Hui Sun Peng Jiang Chun Sun |
| author_sort | Li Xiao |
| collection | DOAJ |
| description | We have obtained the polarization data cube of the supernova remnant (SNR) VRO 42.05.01 at 1240 MHz using the Five-hundred-meter Aperture Spherical Radio Telescope (FAST). Three-dimensional Faraday synthesis is applied to the FAST data to derive the Faraday depth spectrum. The peak Faraday depth map shows a large area of enhanced foreground rotation measure (RM) of ∼60 rad m ^−2 extending along the remnant’s “wing” section, which coincides with a large-scale H i shell at −20 km s ^−1 . The two depolarization patches within the “wing” region with RMs of 97 rad m ^−2 and 55 rad m ^−2 coincide with two H i structures in the H i shell. Faraday screen model fitting on the Canadian Galactic Plane Survey 1420 MHz full-scale polarization data reveals a distance of (0.7–0.8) d _SNR in front of the SNR with enhanced regular magnetic field there. The highly piled-up magnetic field indicates that the H i shell at −20 km s ^−1 could originate from an old evolved SNR. |
| first_indexed | 2024-03-12T02:58:04Z |
| format | Article |
| id | doaj.art-682e1517f75346658e1c696a3b66adb5 |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-12T02:58:04Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-682e1517f75346658e1c696a3b66adb52023-09-03T15:07:29ZengIOP PublishingThe Astrophysical Journal1538-43572023-01-0195229410.3847/1538-4357/acdb6aFAST Polarization Mapping of the Supernova Remnant VRO 42.05.01Li Xiao0https://orcid.org/0000-0002-3435-6211Ming Zhu1https://orcid.org/0000-0001-6083-956XXiao-Hui Sun2https://orcid.org/0000-0002-3464-5128Peng Jiang3Chun Sun4National Astronomical Observatories , CAS, Beijing 100012, People's Republic of China ; xl@nao.cas.cn; Key Laboratory of FAST, NAOC, Chinese Academy of Science , Beijing 100012, People's Republic of China; Guizhou Radio Astronomical Observatory, Guizhou University , Guiyang 550000, People's Republic of ChinaNational Astronomical Observatories , CAS, Beijing 100012, People's Republic of China ; xl@nao.cas.cn; Key Laboratory of FAST, NAOC, Chinese Academy of Science , Beijing 100012, People's Republic of China; Guizhou Radio Astronomical Observatory, Guizhou University , Guiyang 550000, People's Republic of ChinaSchool of Physics and Astronomy, Yunnan University , Kunming, 650500, People's Republic of China National Astronomical Observatories , CAS, Beijing 100012, People's Republic of China ; xl@nao.cas.cn; Key Laboratory of FAST, NAOC, Chinese Academy of Science , Beijing 100012, People's Republic of China; Guizhou Radio Astronomical Observatory, Guizhou University , Guiyang 550000, People's Republic of ChinaNational Astronomical Observatories , CAS, Beijing 100012, People's Republic of China ; xl@nao.cas.cn; Key Laboratory of FAST, NAOC, Chinese Academy of Science , Beijing 100012, People's Republic of China; Guizhou Radio Astronomical Observatory, Guizhou University , Guiyang 550000, People's Republic of ChinaWe have obtained the polarization data cube of the supernova remnant (SNR) VRO 42.05.01 at 1240 MHz using the Five-hundred-meter Aperture Spherical Radio Telescope (FAST). Three-dimensional Faraday synthesis is applied to the FAST data to derive the Faraday depth spectrum. The peak Faraday depth map shows a large area of enhanced foreground rotation measure (RM) of ∼60 rad m ^−2 extending along the remnant’s “wing” section, which coincides with a large-scale H i shell at −20 km s ^−1 . The two depolarization patches within the “wing” region with RMs of 97 rad m ^−2 and 55 rad m ^−2 coincide with two H i structures in the H i shell. Faraday screen model fitting on the Canadian Galactic Plane Survey 1420 MHz full-scale polarization data reveals a distance of (0.7–0.8) d _SNR in front of the SNR with enhanced regular magnetic field there. The highly piled-up magnetic field indicates that the H i shell at −20 km s ^−1 could originate from an old evolved SNR.https://doi.org/10.3847/1538-4357/acdb6aSupernova remnantsInterstellar magnetic fieldsInterstellar synchrotron emission |
| spellingShingle | Li Xiao Ming Zhu Xiao-Hui Sun Peng Jiang Chun Sun FAST Polarization Mapping of the Supernova Remnant VRO 42.05.01 The Astrophysical Journal Supernova remnants Interstellar magnetic fields Interstellar synchrotron emission |
| title | FAST Polarization Mapping of the Supernova Remnant VRO 42.05.01 |
| title_full | FAST Polarization Mapping of the Supernova Remnant VRO 42.05.01 |
| title_fullStr | FAST Polarization Mapping of the Supernova Remnant VRO 42.05.01 |
| title_full_unstemmed | FAST Polarization Mapping of the Supernova Remnant VRO 42.05.01 |
| title_short | FAST Polarization Mapping of the Supernova Remnant VRO 42.05.01 |
| title_sort | fast polarization mapping of the supernova remnant vro 42 05 01 |
| topic | Supernova remnants Interstellar magnetic fields Interstellar synchrotron emission |
| url | https://doi.org/10.3847/1538-4357/acdb6a |
| work_keys_str_mv | AT lixiao fastpolarizationmappingofthesupernovaremnantvro420501 AT mingzhu fastpolarizationmappingofthesupernovaremnantvro420501 AT xiaohuisun fastpolarizationmappingofthesupernovaremnantvro420501 AT pengjiang fastpolarizationmappingofthesupernovaremnantvro420501 AT chunsun fastpolarizationmappingofthesupernovaremnantvro420501 |