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Molecular clouds are sites of star formation. Magnetic fields are believed to play an important role in their dynamics and shaping morphology. We aim to study any possible correlation that might exist between the magnetic fields orientation…

Astrophysics of Galaxies · Physics 2022-10-26 Ekta Sharma , Maheswar Gopinathan , Archana Soam , Chang Won Lee , T. R. Seshadri

A full understanding of high-mass star formation requires the study of one of the most elusive components of the energy balance in the interstellar medium: magnetic fields. We report ALMA 1.2 mm, high-resolution (700 au) dust polarization…

We search for potential ``birthmarks'' left from the formation of filamentary molecular clouds in the Ophiuchus complex. We use high dynamic-range column density and temperature maps derived from \textit{Herschel}, \textit{Planck}, and…

Astrophysics of Galaxies · Physics 2025-05-21 João Alves , Marco Lombardi , Charles Lada

We present the Atacama Large Millimeter/submillimeter Array (ALMA) observations of linearly polarized 870 $\mu$m continuum emission at a resolution of $\sim$0.2$^{\prime\prime}$ (2000 au) toward the two massive clumps, Clump 1 and Clump 4,…

We present the R-band polarimetric results towards two nebulae L1415 and L1389 containing low luminosity stars. Aim of this study is to understand the role played by magnetic fields in formation of low luminosity objects. Linear…

Astrophysics of Galaxies · Physics 2016-10-11 A. Soam , Chang Won Lee , Maheswar G. , Gwanjeong Kim , Neha S. , Mi-Ryang Kim

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

[Abridged] Filaments and hubs have received special attention recently thanks to studies showing their role in star formation. While the column density and velocity structures of both filaments and hubs have been studied, their magnetic…

Astrophysics of Galaxies · Physics 2021-03-17 D. Arzoumanian , R. Furuya , T. Hasegawa , M. Tahani , S. Sadavoy , C. L. H. Hull , D. Johnstone , P. M. Koch , S. -i. Inutsuka , Y. Doi , T. Hoang , T. Onaka , K. Iwasaki , Y. Shimajiri , T. Inoue , N. Peretto , P. André , P. Bastien , D. Berry , H. -R. V. Chen , J. Di Francesco , C. Eswaraiah , L. Fanciullo , L. M. Fissel , J. Hwang , J. -h. Kang , G. Kim , K. -T. Kim , F. Kirchschlager , W. Kwon , C. W. Lee , H. -L. Liu , A. -R. Lyo , K. Pattle , A. Soam , X. Tang , A. Whitworth , T. -C. Ching , S. Coudé , J. -W. Wang , D. Ward-Thompson , S. -P. Lai , K. Qiu , T. L. Bourke , D. -Y. Byun , M. Chen , Z. Chen , W. P. Chen , J. Cho , Y. Choi , M. Choi , A. Chrysostomou , E. J. Chung , S. Dai , P. N. Diep , H. -Y. Duan , Y. Duan , D. Eden , J. Fiege , E. Franzmann , P. Friberg , G. Fuller , T. Gledhill , S. Graves , J. Greaves , M. Griffin , Q. Gu , I. Han , J. Hatchell , S. Hayashi , M. Houde , I. -G. Jeong , M. Kang , S. -j. Kang , A. Kataoka , K. Kawabata , F. Kemper , M. -R. Kim , K. H. Kim , J. Kim , S. Kim , J. Kirk , M. I. N. Kobayashi , V. Konyves , T. Kusune , J. Kwon , K. Lacaille , C. -Y. Law , C. -F. Lee , Y. -H. Lee , S. -S. Lee , H. Lee , J. -E. Lee , H. -b. Li , D. Li , J. Liu , T. Liu , S. -Y. Liu , X. Lu , S. Mairs , M. Matsumura , B. Matthews , G. Moriarty-Schieven , T. Nagata , F. Nakamura , H. Nakanishi , N. B. Ngoc , N. Ohashi , G. Park , H. Parsons , T. -S. Pyo , L. Qian , R. Rao , J. Rawlings , M. Rawlings , B. Retter , J. Richer , A. Rigby , H. Saito , G. Savini , A. Scaife , M. Seta , H. Shinnaga , M. Tamura , Y. -W. Tang , K. Tomisaka , L. N. Tram , Y. Tsukamoto , S. Viti , H. Wang , J. Xie , H. -W. Yen , H. Yoo , J. Yuan , H. -S. Yun , T. Zenko , G. Zhang , C. -P. Zhang , Y. Zhang , J. Zhou , L. Zhu , I. de Looze , C. D. Dowell , S. Eyres , S. Falle , R. Friesen , J. -F. Robitaille , S. van Loo

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

Star formation in the centers of galaxies is thought to yield massive stars with a possibly top-heavy stellar mass distribution. It is likely that magnetic fields play a crucial role in the distribution of stellar masses inside star-forming…

Astrophysics of Galaxies · Physics 2012-08-03 S. Hocuk , D. R. G. Schleicher , M. Spaans , S. Cazaux

We study the effects of an asymmetric radiation field on the properties of a molecular cloud envelope. We employ observations of carbon monoxide (12CO and 13CO), atomic carbon, ionized carbon, and atomic hydrogen to analyze the chemical and…

We observe the magnetic field morphology towards a nearby star-forming filamentary cloud, G202.3+2.5, by the JCMT/POL-2 850 {\mu}m thermal dust polarization observation with an angular resolution of 14.4" (~0.053 pc). The average magnetic…

Atomic gas in the diffuse interstellar medium (ISM) is organized in filamentary structures. These structures usually host cold and dense molecular clumps. The Galactic magnetic field is considered to play an important role in the formation…

Astrophysics of Galaxies · Physics 2022-09-14 R. Skalidis , K. Tassis , G. V. Panopoulou , J. L. Pineda , Y. Gong , N. Mandarakas , D. Blinov , S. Kiehlmann , J. A. Kypriotakis

We report here observations of the Zeeman effect in the 18-cm lines of OH in the envelope regions surrounding four molecular cloud cores toward which detections of B(LOS) have been achieved in the same lines, and evaluate the ratio of mass…

Astrophysics · Physics 2011-02-11 Richard M. Crutcher , Nicholas Hakobian , Thomas H. Troland

We follow the ambipolar-diffusion--driven formation and evolution of a fragment in a magnetically supported molecular cloud, until a hydrostatic protostellar core forms at its center. This problem was formulated in Paper I. We determine the…

Astrophysics · Physics 2011-02-11 Konstantinos Tassis , Telemachos Ch. Mouschovias

We present a comprehensive polarimetric study of 26 nearby molecular clouds in four far-infrared bands (53 $\mu$m to 214 $\mu$m) using 52 archival SOFIA/HAWC+ datasets. Far-infrared dust polarization observations probe the plane-of-sky…

Astrophysics of Galaxies · Physics 2026-03-11 Kaitlyn Karpovich , Susan E. Clark , Enrique Lopez-Rodriguez

We report the detection of a magnetic field in the helium-strong star CPD-57 3509 (B2 IV), a member of the Galactic open cluster NGC3293, and characterise the star's atmospheric and fundamental parameters. Spectropolarimetric observations…

The rotating magnetic B stars have oblique dipolar magnetic fields and often anomalous helium and metallic compositions. These stars develop co-rotating torus-shaped clouds by channelling winds from their magnetic poles to an anchored…

Astrophysics · Physics 2009-11-06 Myron A. Smith , Detlef Groote

Magnetic fields have an impact on galaxy evolution at multiple scales. They are particularly important for starburst galaxies, where they play a crucial role in shaping the interstellar medium (ISM), influencing star formation processes and…