Magnetic Field of Molecular Gas Measured with the Velocity Gradient Technique I. Orion A

Magnetic Field of Molecular Gas Measured with the Velocity Gradient Technique I. Orion A
复制标题

用速度梯度技术测量分子气体的磁场 I. Orion A

DOI:
10.3847/1538-4357/ac78e8
复制
发表时间:
2022-06
期刊:
The Astrophysical Journal
影响因子:
--
通讯作者:
Tursun Kadirya
Tursun Kadirya
中科院分区:
其他
文献类型:
--
作者:
Zhao Mengke;Zhou Jianjun;Hu Yue;Lazarian A.;Tang Xindi;Baan Willem A.;Esimbek Jarken;He Yuxin;Li Dalei;Ji Weiguang;Tursun Kadirya

文献摘要

参考文献

相似文献

摘要磁场在分子云的演化和星星的形成过程中起着重要的作用。利用速度梯度技术(VGT)模型,我们测量了猎户座A中的磁场,使用12 CO,13 CO和C18 O(1-0)发射线,尺度为12.07 pc。所测量的B场显示了一个东西方向,在大尺度上垂直于猎户座A的整体形状的灯丝。由13 CO和C18 O得到的VGT磁场与由普朗克353 GHz尘埃极化测量的B场在0.55pc尺度上一致。采用速度分解算法消除密度效应,可显著提高VGT用~(12)CO(1-0)线追踪磁场的精度。利用Davis-Krasekhar-Fermi方法和双马赫数技术对OMC-1、OMC-2、OMC-3、OMC-4、OMC-5、L1641-N和NGC 1999等7个亚云的磁场强度进行了估算,结果与以前在远红外和亚毫米波段尘埃偏振的结果一致。在较小的尺度下,VGT证明是测量磁场的好方法。
Abstract Magnetic fields play an important role in the evolution of molecular clouds and star formation. Using the velocity gradient technique (VGT) model, we measured the magnetic field in Orion A using the 12 CO, 13 CO, and C 18 O(1-0) emission lines at a scale of ∼0.07 pc. The measured B field shows an east–west orientation that is perpendicular to the integral shaped filament of Orion A at large scale. The VGT magnetic fields obtained from 13 CO and C 18 O are in agreement with the B field that is measured from the Planck 353 GHz dust polarization at a scale of ∼0.55 pc. Removal of density effects by using a velocity decomposition algorithm can significantly improve the accuracy of the VGT in tracing magnetic fields with the 12 CO(1-0) line. The magnetic field strengths of seven subclouds, OMC-1, OMC-2, OMC-3, OMC-4, OMC-5, L 1641-N, and NGC 1999, have also been estimated with the Davis–Chandrasekhar–Fermi and the Two Mach Numbers technique, and these are found to be in agreement with previous results obtained from dust polarization at far-infrared and submillimeter wavelengths. At smaller scales, the VGT prove a good method to measure magnetic fields.
DOI: 10.3847/1538-4357/ab1484
发表时间: 2019-03
期刊: The Astrophysical Journal
影响因子: --
作者:
Ya-wen Tang;P. Koch;N. Peretto;G. Novak;A. Duarte-Cabral;N. Chapman;P. Hsieh;Hsi-Wei Yen
通讯作者: Ya-wen Tang;P. Koch;N. Peretto;G. Novak;A. Duarte-Cabral;N. Chapman;P. Hsieh;Hsi-Wei Yen
DOI: 10.3847/1538-4357/abe4d4
发表时间: 2020-12
期刊: The Astrophysical Journal
影响因子: --
作者:
K. Yuen;K. Ho;A. Lazarian
通讯作者: K. Yuen;K. Ho;A. Lazarian
DOI: 10.3847/1538-4357/aad3b5
发表时间: 2018-07
期刊: The Astrophysical Journal
影响因子: --
作者:
C. Zucker;H. Chen
通讯作者: C. Zucker;H. Chen
DOI: 10.3847/2041-8213/aa6255
发表时间: 2017-01
期刊: The Astrophysical Journal Letters
影响因子: --
作者:
K. Yuen;A. Lazarian
通讯作者: K. Yuen;A. Lazarian
DOI: 10.1051/0004-6361/201834049
发表时间: 2018-03
期刊: The Astrophysical Journal Supplement Series
影响因子: --
作者:
Shuo Kong;H. Arce;J. Feddersen;J. Carpenter;F. Nakamura;Y. Shimajiri;A. Isella;V. Ossenkopf-Okada;A. Sargent;Á. Sánchez-Monge;S. Suri;J. Kauffmann;T. Pillai;J. Pineda;J. Koda;J. Bally;D. Lis;P. Padoan;R. Klessen;S. Mairs;A. Goodman;P. Goldsmith;P. McGehee;P. Schilke;P. Teuben;M. Maureira;C. Hara;A. Ginsburg;B. Burkhart;Rowan J. Smith;A. Schmiedeke;J. Pineda;S. Ishii;K. Sasaki;R. Kawabe;Yumiko Urasawa;S. Oyamada;Yoshihiro Tanabe
通讯作者: Shuo Kong;H. Arce;J. Feddersen;J. Carpenter;F. Nakamura;Y. Shimajiri;A. Isella;V. Ossenkopf-Okada;A. Sargent;Á. Sánchez-Monge;S. Suri;J. Kauffmann;T. Pillai;J. Pineda;J. Koda;J. Bally;D. Lis;P. Padoan;R. Klessen;S. Mairs;A. Goodman;P. Goldsmith;P. McGehee;P. Schilke;P. Teuben;M. Maureira;C. Hara;A. Ginsburg;B. Burkhart;Rowan J. Smith;A. Schmiedeke;J. Pineda;S. Ishii;K. Sasaki;R. Kawabe;Yumiko Urasawa;S. Oyamada;Yoshihiro Tanabe