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相关论文: Relative Alignment between Dense Molecular Cores a…

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We present synthetic dust polarization maps of simulated molecular clouds (MCs) with the goal to systematically explore the origin of the relative orientation of the magnetic field ($\bf{B}$) with respect to the MC sub-structures identified…

星系天体物理 · 物理学 2020-08-26 D. Seifried , S. Walch , M. Weis , S. Reissl , J. D. Soler , R. S. Klessen , P. R. Joshi

Interstellar magnetic fields are thought to play a fundamental role in the evolution of star-forming regions. Polarized thermal dust emission serves as a key probe for understanding the structure of the POS component of the magnetic field.…

星系天体物理 · 物理学 2025-03-05 A. Tritsis , S. Basu , C. Federrath

It is thought that magnetic fields must be present in the interiors of stars to resolve certain discrepancies between theory and observation (e.g. angular momentum transport), but such fields are difficult to detect and characterise.…

太阳与恒星天体物理 · 物理学 2021-04-21 Shyeh Tjing Loi

Magnetic fields are important at every scale in the star formation process: from the dynamics of the ISM in galaxies, to the collapse of turbulent molecular clouds to form stars and in the fragmentation of individual star forming cores. The…

天体物理学 · 物理学 2008-04-30 Daniel J. Price , Matthew R. Bate , Clare L. Dobbs

Magnetic fields and turbulence may play a crucial role in the evolution of molecular clouds and ultimately in the formation of dense cores and stars. Despite being studied in many molecular clouds, the exact role of magnetic fields and…

星系天体物理 · 物理学 2026-03-26 A. Koley , P. Sanhueza , A. M. Stutz , P. Saha , F. A. Olguin , A. Ginsburg , N. Sandoval-Garrido , N. Castro-Toledo

Observational studies of magnetic fields are vital as magnetic fields play a crucial role in various astrophysical processes, including star formation, accretion of matter, transport processes (e.g., transport of heat), and cosmic rays. We…

星系天体物理 · 物理学 2015-06-04 Huirong Yan , A. Lazarian

We examine the role of the interstellar magnetic field to modulate the orientation of turbulent flows within the Taurus molecular cloud using spatial gradients of thin velocity slices of 12CO and 13CO antenna temperatures. Our analysis…

星系天体物理 · 物理学 2020-07-01 M. Heyer , J. D. Soler , B. Burkhart

We present Submillimeter Array 880 $\mu$m dust polarization observations of six massive dense cores in the DR21 filament. The dust polarization shows complex magnetic field structures in the massive dense cores with sizes of 0.1 pc, in…

星系天体物理 · 物理学 2017-04-05 Tao-Chung Ching , Shih-Ping Lai , Qizhou Zhang , Josep M. Girart , Keping Qiu , Hauyu B. Liu

Linearly polarized emission from dust grains and molecular spectroscopy is an effective probe of the magnetic field topology in the interstellar medium and molecular clouds. The longstanding Davis-Chandrasekhar-Fermi (DCF) method and the…

星系天体物理 · 物理学 2022-09-13 Junhao Liu , Qizhou Zhang , Keping Qiu

In giant molecular clouds (GMCs), shocks driven by converging turbulent flows create high-density, strongly-magnetized regions that are locally sheetlike. In previous work, we showed that within these layers, dense filaments and embedded…

星系天体物理 · 物理学 2015-10-21 Che-Yu Chen , Eve C. Ostriker

Crutcher, Hakobian, and Troland (2009) used OH Zeeman observations of four nearby molecular dark clouds to show that the ratio of mass to magnetic flux was smaller in the ~0.1 pc cores than in the ~1 pc envelopes, in contradiction to the…

太阳与恒星天体物理 · 物理学 2015-05-14 R. M. Crutcher , N. Hakobian , T. H. Troland

Polarimetry is one of the most informative techniques of studying magnetic fields in molecular clouds. How reliable the interpretation of the polarization maps in terms of magnetic fields is the issue that the grain alignment theory…

天体物理学 · 物理学 2016-08-30 A. Lazarian , J. Cho

We investigate star formation from subparsec to kpc scales with magnetohydrodynamic (MHD) models of a cloud structure and a section of galactic spiral arm. We aim to understand how magnetic fields affect star formation, cloud formation and…

星系天体物理 · 物理学 2024-07-09 Nicholas P. Herrington , Clare L. Dobbs , Thomas J. R. Bending

Stars form in dense cores of magnetized molecular clouds. If the magnetic flux threading the cores is dragged into the stars, the stellar field would be orders of magnitude stronger than observed. This well-known "magnetic flux problem"…

太阳与恒星天体物理 · 物理学 2015-05-28 Bo Zhao , Zhi-Yun Li , Fumitaka Nakamura , Ruben Krasnopolsky , Hsien Shang

We show that atomic alignment presents a reliable way to study topology of astrophysical magnetic fields. The effect of atomic alignment arises from modulation of the relative population of the sublevels of atomic ground state pumped by…

天体物理学 · 物理学 2008-11-26 Huirong Yan , A. Lazarian

Of all the factors that influence star formation, magnetic fields are perhaps the least well understood. The goal of this paper is to characterize the 3D magnetic field properties of nearby molecular clouds through various methods of…

星系天体物理 · 物理学 2021-04-13 Colin H. Sullivan , Laura Fissel , Patrick King , Che-Yu Chen , Zhi-Yun Li , Juan Soler

Magnetic fields pervade in the interstellar medium (ISM) and are believed to be important in the process of star formation, yet probing magnetic fields in star formation regions is challenging. We propose a new method to use Faraday…

星系天体物理 · 物理学 2018-06-27 M. Tahani , R. Plume , J. C. Brown , J. Kainulainen

We investigate the effect of the Milky Way's magnetic field in star forming regions using archived 350 micron polarization data on 52 Galactic star formation regions from the Hertz polarimeter module. The polarization angles and percentages…

太阳与恒星天体物理 · 物理学 2015-05-20 Ian W. Stephens , Leslie W. Looney , C. Darren Dowell , John E. Vaillancourt , Konstantinos Tassis

We estimate the polarized thermal dust emission from MHD simulations of protostellar collapse and outflow formation in order to investigate alignment of outflows with magnetic fields. The polarization maps indicate that alignment of an…

天体物理学 · 物理学 2009-11-13 Tomoaki Matsumoto , Takeshi Nakazato , Kohji Tomisaka

By comparing cumulative linear mass profiles of 12 Gould Belt molecular clouds within 500 pc, we study how the linear mass distributions of molecular clouds vary with the angles between the molecular cloud long axes and the directions of…

星系天体物理 · 物理学 2019-06-25 Chi Yan Law , Hua Bai Li , Pokin Leung