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We present a study connecting the physical properties of protostellar envelopes to the morphology of the envelope-scale magnetic field. We used the ALMA polarization observations of 61 young prtostars at 0.87 mm on $\sim400-3000$ au scales…

We present 870 um polarimetric observations toward 61 protostars in the Orion molecular clouds, with ~400 au (1") resolution using the Atacama Large Millimeter/submillimeter Array. We successfully detect dust polarization and outflow…

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…

We investigate the relative alignment between density structures and magnetic fields in eight young protostars from the ALMA B-field Orion Protostellar Survey. Column density maps are derived from 870 $\mu$m dust continuum emission, and the…

Far-infrared (FIR) dust polarimetry enables the study of interstellar magnetic fields via tracing of the polarized emission from dust grains that are partially aligned with the direction of the field. The advent of high quality polarimetric…

Magnetic fields play a fundamental role in protostellar collapse and disk formation, yet direct measurements of magnetic field strength in deeply embedded protostellar envelopes remain difficult. We present a new method to estimate both the…

Earth and Planetary Astrophysics · Physics 2026-03-24 Yisheng Tu , Xiaoyuan Yang , Zhi-Yun Li

We summarise the results of a spectropolarimetric survey of 56 chemically peculiar (CP) stars in the association of Orion OB1. We uniformly collected the observational material with the 6-m telescope BTA of the Special Astrophysical…

Solar and Stellar Astrophysics · Physics 2022-07-20 Eugene Semenko , Iosif Romanyuk , Ilya Yakunin , Dmitry Kudryavtsev , Anastasiya Moiseeva

Using the 353-GHz polarization observations by the Planck satellite we characterize the magnetic field in the Orion-Eridanus superbubble, a nearby expanding structure that spans more than 1600 square degrees in the sky. We identify a region…

Astrophysics of Galaxies · Physics 2018-02-14 J. D. Soler , A. Bracco , A. Pon

An hourglass-shaped magnetic field pattern arises naturally from the gravitational collapse of a star-forming gas cloud. Most studies have focused on the prestellar collapse phase, when the structure has a smooth and monotonic radial…

Solar and Stellar Astrophysics · Physics 2024-06-10 Shantanu Basu , Xiyuan Li , Gianfranco Bino

Angular dispersion functions are typically used to estimate the fluctuations in polarization angle around the mean magnetic field orientation in dense regions, such as molecular clouds. The technique provides accurate turbulent to regular…

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 first detection of polarization around the Class 0 low-mass protostar L1157-mm at two different wavelengths. We show polarimetric maps at large scales (10" resolution at 350 um) from the SHARC-II Polarimeter and at smaller…

The formation of the massive stars, and in particular, the role that the magnetic fields play in their early evolutionary phase is still far from being completely understood. Here, we present Atacama Large Millimeter/Submillimeter Array…

Although, from a theoretical point of view, magnetic fields are believed to have a significant role during the early stages of star formation, especially during the main accretion phase, the magnetic field strength and topology is poorly…

We use extensive 350 um polarimetry and continuum maps obtained with Hertz and SHARC II along with HCN and HCO+ spectroscopic data to trace the orientation of the magnetic field in the Orion A star-forming region. Using the polarimetry…

Surface magnetic fields are detected in less than $10\%$ of the massive O-type star population and even less frequently among `old' massive stars approaching the terminal-age main sequence (TAMS). It is unclear to what extent the rarity of…

Solar and Stellar Astrophysics · Physics 2025-09-19 James A. Barron , Gregg A. Wade , Gonzalo Holgado , Sergio Simón-Díaz

We present the results of dust emission polarization measurements of Ophiuchus-B (Oph-B) carried out using the Submillimetre Common-User Bolometer Array 2 (SCUBA-2) camera with its associated polarimeter (POL-2) on the James Clerk Maxwell…

Astrophysics of Galaxies · Physics 2018-07-18 Archana Soam , Kate Pattle , Derek Ward-Thompson , Chang Won Lee , Sarah Sadavoy , Patrick M. Koch , Gwanjeong Kim , Jungmi Kwon , Woojin Kwon , Doris Arzoumanian , David Berry , Thiem Hoang , Motohide Tamura , Sang-Sung Lee , Tie Liu , Kee-Tae Kim , Doug Johnstone , Fumitaka Nakamura , A-Ran Lyo , Takashi Onaka , Jongsoo Kim , Ray S. Furuya , Tetsuo Hasegawa , Shih-Ping Lai , Pierre Bastien , Eun Jung Chung , Shinyoung Kim , Harriet Parsons , Mark Rawlings , Steve Mairs , Sarah F. Graves , J. -F. Robitaille , Hong-Li Liu , Anthony P. Whitworth , Chakali Eswaraiah , Ramprasad Rao , Hyunju Yoo , Martin Houde , Ji-hyun Kang , Yasuo Doi , Minho Choi , Miju Kang , Simon Coude , Hua-bai Li , Masafumi Matsumura , Brenda C. Matthews , Andy Pon , James Di Francesco , Saeko S. Hayashi , Koji S. Kawabata , Shu-ichiro Inutsuka , Keping Qiu , Erica Franzmann , Per Friberg , Jane S. Greaves , Jason M. Kirk , Di Li , Hiroko Shinnaga , Sven van Loo , Yusuke Aso , Do-Young Byun , Huei-Ru Chen , Mike C. -Y. Chen , Wen Ping Chen , Tao-Chung Ching , Jungyeon Cho , Antonio Chrysostomou , Emily Drabek-Maunder , Stewart P. S. Eyres , Jason Fiege , Rachel K. Friesen , Gary Fuller , Tim Gledhill , Matt J. Griffin , Qilao Gu , Jennifer Hatchell , Wayne Holland , Tsuyoshi Inoue , Kazunari Iwasaki , Il-Gyo Jeong , Sung-ju Kang , Francisca Kemper , Kyoung Hee Kim , Mi-Ryang Kim , Kevin M. Lacaille , Jeong-Eun Lee , Dalei Li , Junhao Liu , Sheng-Yuan Liu , Gerald H. Moriarty-Schieven , Hiroyuki Nakanishi , Nagayoshi Ohashi , Nicolas Peretto , Tae-Soo Pyo , Lei Qian , Brendan Retter , John Richer , Andrew Rigby , Giorgio Savini , Anna M. M. Scaife , Ya-Wen Tang , Kohji Tomisaka , Hongchi Wang , Jia-Wei Wang , Hsi-Wei Yen , Jinghua Yuan , Chuan-Peng Zhang , Guoyin Zhang , Jianjun Zhou , Lei Zhu , Philippe Andre , C. Darren Dowell , Sam Falle , Yusuke Tsukamoto , Yoshihiro Kanamori , Akimasa Kataoka , Masato I. N. Kobayashi , Tetsuya Nagata , Hiro Saito , Masumichi Seta , Jihye Hwang , Ilseung Han , Hyeseung Lee , Tetsuya Zenko

The first polarimetric images of the OMC-3 region of the Orion A filamentary molecular cloud are presented. Using the JCMT, we have detected polarized thermal emission at 850 microns from dust along a 6' length of the dense filament. The…

Astrophysics · Physics 2009-10-31 Brenda C. Matthews , Christine D. Wilson

Context: The importance of magnetic fields at the onset of star formation related to the early fragmentation and collapse processes is largely unexplored today. Aims: We want to understand the magnetic field properties at the earliest…

Astrophysics of Galaxies · Physics 2018-06-13 H. Beuther , J. Soler , W. Vlemmings , H. Linz , Th. Henning , R. Kuiper , R. Rao , R. Smith , T. Sakai , K. Johnston , A. Walsh , S. Feng
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