Magnetic field in mini starburst complex Sgr B2
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866913396465598464 |
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| author | Pan, Xing Zhang, Qizhou Qiu, Keping Rao, Ramprasad Zeng, Lingzhen Lu, Xing Liu, Junhao |
| author_facet | Pan, Xing Zhang, Qizhou Qiu, Keping Rao, Ramprasad Zeng, Lingzhen Lu, Xing Liu, Junhao |
| contents | We report the first arcsecond-resolution observations of the magnetic field in the mini starburst complex Sgr B2. SMA polarization observations revealed magnetic field morphology in three dense cores of Sgr B2 N(orth), M(ain), and S(outh). The total plane-of-sky magnetic field strengths in these cores are estimated to be 4.3-10.0 mG, 6.2-14.7 mG, and 1.9-4.5 mG derived from the angular dispersion function method after applying the correction factors of 0.21 and 0.5. Combining with analyses of the parsec-scale polarization data from SOFIA, we found that a magnetically supercritical condition is present from the cloud-scale ($\sim$10 pc) to core-scale ($\sim$0.2 pc) in Sgr B2, which is consistent with the burst of star formation activities in the region likely resulted from a multi-scale gravitational collapse from the cloud to dense cores. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_11800 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Magnetic field in mini starburst complex Sgr B2 Pan, Xing Zhang, Qizhou Qiu, Keping Rao, Ramprasad Zeng, Lingzhen Lu, Xing Liu, Junhao Astrophysics of Galaxies We report the first arcsecond-resolution observations of the magnetic field in the mini starburst complex Sgr B2. SMA polarization observations revealed magnetic field morphology in three dense cores of Sgr B2 N(orth), M(ain), and S(outh). The total plane-of-sky magnetic field strengths in these cores are estimated to be 4.3-10.0 mG, 6.2-14.7 mG, and 1.9-4.5 mG derived from the angular dispersion function method after applying the correction factors of 0.21 and 0.5. Combining with analyses of the parsec-scale polarization data from SOFIA, we found that a magnetically supercritical condition is present from the cloud-scale ($\sim$10 pc) to core-scale ($\sim$0.2 pc) in Sgr B2, which is consistent with the burst of star formation activities in the region likely resulted from a multi-scale gravitational collapse from the cloud to dense cores. |
| title | Magnetic field in mini starburst complex Sgr B2 |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2406.11800 |