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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/2403.15280 |
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| _version_ | 1866913278402232320 |
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| author | Wang, Lijun Cao, Zhuo Fan, Xiaodan Li, Hua-bai |
| author_facet | Wang, Lijun Cao, Zhuo Fan, Xiaodan Li, Hua-bai |
| contents | The formation of protostellar disks is still a mystery, largely due to the difficulties in observations that can constrain theories. For example, the 3D alignment between the rotation of the disk and the magnetic fields (B-fields) in the formation environment is critical in some models, but so far impossible to observe. Here, we study the possibility of probing the alignment between B-field and disk rotation using ``polarization holes'' (PHs). PHs are widely observed and are caused by unresolved B-field structures. With ideal magnetohydrodynamic (MHD) simulations, we demonstrate that different initial alignments between B-field and angular momentum (AM) can result in B-field structures that are distinct enough to produce distinguishable PHs. Thus PHs can potentially serve as probes for alignments between B-field and AM in disk formation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_15280 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Polarization Holes as an Indicator of Magnetic Field-Angular Momentum Alignment I. Initial Tests Wang, Lijun Cao, Zhuo Fan, Xiaodan Li, Hua-bai Astrophysics of Galaxies Applications The formation of protostellar disks is still a mystery, largely due to the difficulties in observations that can constrain theories. For example, the 3D alignment between the rotation of the disk and the magnetic fields (B-fields) in the formation environment is critical in some models, but so far impossible to observe. Here, we study the possibility of probing the alignment between B-field and disk rotation using ``polarization holes'' (PHs). PHs are widely observed and are caused by unresolved B-field structures. With ideal magnetohydrodynamic (MHD) simulations, we demonstrate that different initial alignments between B-field and angular momentum (AM) can result in B-field structures that are distinct enough to produce distinguishable PHs. Thus PHs can potentially serve as probes for alignments between B-field and AM in disk formation. |
| title | Polarization Holes as an Indicator of Magnetic Field-Angular Momentum Alignment I. Initial Tests |
| topic | Astrophysics of Galaxies Applications |
| url | https://arxiv.org/abs/2403.15280 |