The magnetic field in colliding filaments G202.3+2.5
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| Autores principales: | , , , , , , , , , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866911755815354368 |
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| author | Gu, Qi-Lao Liu, Tie Li, Pak Shing Shen, Zhi-Qiang Liu, Xunchuan Liu, Junhao Lu, Xing Montillaud, Julien Jiao, Sihan Juvela, Mika Rawlings, Mark G. Zhang, Qizhou Koch, Patrick Ristorcelli, Isabelle Carriere, Jean-Sébastien Eden, David Ren, Zhiyuan Tatematsu, Ken'ichi Hirano, Naomi Luo, Qiu-yi Mai, Xiaofeng Issac, Namitha |
| author_facet | Gu, Qi-Lao Liu, Tie Li, Pak Shing Shen, Zhi-Qiang Liu, Xunchuan Liu, Junhao Lu, Xing Montillaud, Julien Jiao, Sihan Juvela, Mika Rawlings, Mark G. Zhang, Qizhou Koch, Patrick Ristorcelli, Isabelle Carriere, Jean-Sébastien Eden, David Ren, Zhiyuan Tatematsu, Ken'ichi Hirano, Naomi Luo, Qiu-yi Mai, Xiaofeng Issac, Namitha |
| contents | We observe the magnetic field morphology towards a nearby star-forming filamentary cloud, G202.3+2.5, by the JCMT/POL-2 850 μm thermal dust polarization observation with an angular resolution of 14.4" (~0.053 pc). The average magnetic field orientation is found to be perpendicular to the filaments while showing different behaviors in the four subregions, suggesting various effects from filaments' collision in these subregions. With the kinematics obtained by N2H+ observation by IRAM, we estimate the plane-of-sky (POS) magnetic field strength by two methods, the classical Davis-Chandrasekhar-Fermi (DCF) method and the angular dispersion function (ADF) method, B_{pos,dcf} and B_{pos,adf} are ~90 μG and ~53 μG. We study the relative importance between the gravity (G), magnetic field (B) and turbulence (T) in the four subregions, find G > T > B, G >= T > B, G ~ T > B and T > G > B in the north tail, west trunk, south root and east wing, respectively. In addition, we investigate the projection effect on the DCF and ADF methods based on a similar simulation case and find the 3D magnetic field strength may be underestimated by a factor of ~3 if applying the widely-used statistical B_{pos}-to-B_{3D} factor when using DCF or ADF method, which may further underestimate/overestimate related parameters. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_05079 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The magnetic field in colliding filaments G202.3+2.5 Gu, Qi-Lao Liu, Tie Li, Pak Shing Shen, Zhi-Qiang Liu, Xunchuan Liu, Junhao Lu, Xing Montillaud, Julien Jiao, Sihan Juvela, Mika Rawlings, Mark G. Zhang, Qizhou Koch, Patrick Ristorcelli, Isabelle Carriere, Jean-Sébastien Eden, David Ren, Zhiyuan Tatematsu, Ken'ichi Hirano, Naomi Luo, Qiu-yi Mai, Xiaofeng Issac, Namitha Astrophysics of Galaxies Solar and Stellar Astrophysics We observe the magnetic field morphology towards a nearby star-forming filamentary cloud, G202.3+2.5, by the JCMT/POL-2 850 μm thermal dust polarization observation with an angular resolution of 14.4" (~0.053 pc). The average magnetic field orientation is found to be perpendicular to the filaments while showing different behaviors in the four subregions, suggesting various effects from filaments' collision in these subregions. With the kinematics obtained by N2H+ observation by IRAM, we estimate the plane-of-sky (POS) magnetic field strength by two methods, the classical Davis-Chandrasekhar-Fermi (DCF) method and the angular dispersion function (ADF) method, B_{pos,dcf} and B_{pos,adf} are ~90 μG and ~53 μG. We study the relative importance between the gravity (G), magnetic field (B) and turbulence (T) in the four subregions, find G > T > B, G >= T > B, G ~ T > B and T > G > B in the north tail, west trunk, south root and east wing, respectively. In addition, we investigate the projection effect on the DCF and ADF methods based on a similar simulation case and find the 3D magnetic field strength may be underestimated by a factor of ~3 if applying the widely-used statistical B_{pos}-to-B_{3D} factor when using DCF or ADF method, which may further underestimate/overestimate related parameters. |
| title | The magnetic field in colliding filaments G202.3+2.5 |
| topic | Astrophysics of Galaxies Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2401.05079 |