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Related papers: Magnetic Fields in Dark Cloud Cores: Arecibo OH Ze…

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High-mass Stars are cosmic engines known to dominate the energetics in the Milky Way and other galaxies. However, their formation is still not well understood. Massive, cold, dense clouds, often appearing as Infrared Dark Clouds (IRDCs),…

Astrophysics of Galaxies · Physics 2015-06-23 Thushara Pillai , Jens Kauffmann , Jonathan C. Tan , Paul F. Goldsmith , Sean J. Carey , Karl M. Menten

Direct measurements of magnetic fields in low-mass stars of spectral class M have become available during the last years. This contribution summarizes the data available on direct magnetic measurements in M dwarfs from Zeeman analysis in…

Solar and Stellar Astrophysics · Physics 2009-11-13 Ansgar Reiners

We present the first resolved map of plane-of-sky magnetic field strength for a quiescent molecular cloud. GRSMC 45.60+0.30 subtends 40 x 10 pc at a distance of 1.88 kpc, masses 16,000 M_sun, and exhibits no star formation. Near-infrared…

Astrophysics of Galaxies · Physics 2012-08-31 Robert C. Marchwinski , Michael D. Pavel , Dan P. Clemens

Magnetic fields are believed to play an important role in the evolution of molecular clouds, from their large scale structure to dense cores, protostellar envelopes, and protoplanetary disks. How important is unclear, and whether magnetic…

Astrophysics · Physics 2007-05-23 Tyler L. Bourke , Alyssa A. Goodman

The SCUBA polarized 850 microns thermal emission data of the region OMC-2 in Orion A are added to and homogeneously reduced with data already available in the region OMC-3. The data set shows that OMC-2 is a region generally less polarized…

Astrophysics of Galaxies · Physics 2015-05-18 Frederick Poidevin , Pierre Bastien , Brenda C. Matthews

In order to study the fragmentation of massive dense cores, which constitute the cluster cradles, we observed with the PdBI in the most extended configuration the continuum at 1.3 mm and the CO(2-1) emission of four massive cores. We detect…

We determine the magnetic field strength in the OMC 1 region of the Orion A filament via a new implementation of the Chandrasekhar-Fermi method using observations performed as part of the James Clerk Maxwell Telescope (JCMT) B-Fields In…

The recently-discovered Eos molecular cloud, is a CO-dark, low-density cloud located at a distance of approximately 94 pc from the Sun which does not appear to have formed stars at any point in its history. In this paper we investigate the…

Astrophysics of Galaxies · Physics 2025-08-05 Janik Karoly , Kate Pattle , Blakesley Burkhart , Thavisha Dharmawardena , B-G Andersson , Thomas J. Haworth

While magnetic fields likely play an important role in driving the evolution of protoplanetary disks through angular momentum transport, observational evidence of magnetic fields has only been found in a small number of disks. Although dust…

We present the first published maps of magnetic fields in pre-stellar cores, to test theoretical ideas about the way in which the magnetic field geometry affects the star formation process. The observations are JCMT-SCUBA maps of 850 micron…

Astrophysics · Physics 2009-10-31 D. Ward-Thompson , J. M. Kirk , R. M. Crutcher , J. S. Greaves , W. S. Holland , P. Andre

We present three Orion simulations of star cluster formation in a 1000 Msun, turbulent molecular cloud clump, including the effects of radiative transfer, protostellar outflows, and magnetic fields. Our simulations all use self-consistent…

Astrophysics of Galaxies · Physics 2015-06-18 Andrew Myers , Richard Klein , Mark Krumholz , Chris McKee

Magnetic fields have been observed on all scales in our Galaxy, from AU to kpc. With pulsar dispersion measures and rotation measures, we can directly measure the magnetic fields in a very large region of the Galactic disk. The results show…

Astrophysics · Physics 2009-01-01 Jinlin Han

The Davis-Chandrasekhar-Fermi (DCF) method provides an indirect way to estimate the magnetic field strength from statistics of magnetic field orientations. We compile all the previous DCF estimations from polarized dust emission…

Astrophysics of Galaxies · Physics 2022-02-02 Junhao Liu , Keping Qiu , Qizhou Zhang

Despite their importance in the star formation process, measurements of magnetic field strength in proto-planetary discs remain rare. While linear polarisation of dust and molecular lines can give insight into the magnetic field structure,…

The strength of the total magnetic field in our Milky Way from radio Zeeman and synchrotron measurements is about 6 muG near the Sun and several mG in dense clouds, pulsar wind nebulae, and filaments near the Galactic Center. Diffuse…

Astrophysics · Physics 2009-11-13 Rainer Beck

The orientation of the magnetic field (B-field) in the filamentary dark cloud GF 9 was traced from the periphery of the cloud into the L1082C dense core that contains the low-mass, low-luminosity Class 0 young stellar object (YSO) GF 9-2…

Instrumentation and Methods for Astrophysics · Physics 2018-11-07 Dan P. Clemens , A. M. El Batal , C. Cerny , S. Kressy , G. Schroeder , T. Pillai

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…

Astrophysics of Galaxies · Physics 2015-10-21 Che-Yu Chen , Eve C. Ostriker

Context. Magnetic fields can affect significantly the star formation process. The theory of the magnetically-driven collapse in a uniform field predicts that initially the contraction happens along the field lines. When the gravitational…

Solar and Stellar Astrophysics · Physics 2019-11-13 Elena Redaelli , Felipe O. Alves , Fabio P. Santos , Paola Caselli

We present the stability analysis of two regions, OMC-3 and OMC-4, in the massive and long molecular cloud complex of Orion A. We obtained $214~\mu$m HAWC+/SOFIA polarization data, and we make use of archival data for the column density and…

Astrophysics of Galaxies · Physics 2022-06-29 Pak Shing Li , Enrique Lopez-Rodriguez , Archana Soam , Richard I. Klein

We present magnetohydrodynamic simulations aimed at studying the effect of the magnetic suppression of turbulence (generated through various instabilities during the formation of molecular clouds by converging) on the subsequent star…

Astrophysics of Galaxies · Physics 2017-12-08 Zamora-Avilés Manuel , Vázquez-Semadeni Enrique , Körtgen Bastian , Banerjee Robi , Hartmann Lee
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