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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…

New visible and K-band polarization measurements on stars surrounding molecular clouds in Orion A and stars in the BN vicinity are presented. Our results confirm that magnetic fields located inside the Orion A molecular clouds and in their…

星系天体物理 · 物理学 2015-05-30 Frédérick Poidevin , Pierre Bastien , Terry J. Jones

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…

星系天体物理 · 物理学 2022-06-29 Pak Shing Li , Enrique Lopez-Rodriguez , Archana Soam , Richard I. Klein

We expand our study on the dispersion of polarization angles in molecular clouds. We show how the effect of signal integration through the thickness of the cloud as well as across the area subtended by the telescope beam inherent to dust…

星系天体物理 · 物理学 2014-11-20 Martin Houde , John E. Vaillancourt , Roger H. Hildebrand , Shadi Chitsazzadeh , Larry Kirby

We present the POL-2 850 $\mu$m linear polarization map of the Barnard 1 clump in the Perseus molecular cloud complex from the B-fields In STar-forming Region Observations (BISTRO) survey at the James Clerk Maxwell Telescope. We find a…

星系天体物理 · 物理学 2019-05-31 Simon Coudé , Pierre Bastien , Martin Houde , Sarah Sadavoy , Rachel Friesen , James Di Francesco , Doug Johnstone , Steve Mairs , Tetsuo Hasegawa , Woojin Kwon , Shih-Ping Lai , Keping Qiu , Derek Ward-Thompson , David Berry , Michael Chun-Yuan Chen , Jason Fiege , Erica Franzmann , Jennifer Hatchell , Kevin Lacaille , Brenda C. Matthews , Gerald H. Moriarty-Schieven , Andy Pon , Philippe André , Doris Arzoumanian , Yusuke Aso , Do-Young Byun , Eswaraiah Chakali , Huei-Ru Chen , Wen Ping Chen , Tao-Chung Ching , Jungyeon Cho , Minho Choi , Antonio Chrysostomou , Eun Jung Chung , Yasuo Doi , Emily Drabek-Maunder , C. Darren Dowell , Stewart P. S. Eyres , Sam Falle , Per Friberg , Gary Fuller , Ray S. Furuya , Tim Gledhill , Sarah F. Graves , Jane S. Greaves , Matt J. Griffin , Qilao Gu , Saeko S. Hayashi , Thiem Hoang , Wayne Holland , Tsuyoshi Inoue , Shu-ichiro Inutsuka , Kazunari Iwasaki , Il-Gyo Jeong , Yoshihiro Kanamori , Akimasa Kataoka , Ji-hyun Kang , Miju Kang , Sung-ju Kang , Koji S. Kawabata , Francisca Kemper , Gwanjeong Kim , Jongsoo Kim , Kee-Tae Kim , Kyoung Hee Kim , Mi-Ryang Kim , Shinyoung Kim , Jason M. Kirk , Masato I. N. Kobayashi , Patrick M. Koch , Jungmi Kwon , Jeong-Eun Lee , Chang Won Lee , Sang-Sung Lee , Dalei Li , Di Li , Hua-bai Li , Hong-Li Liu , Junhao Liu , Sheng-Yuan Liu , Tie Liu , Sven van Loo , A-Ran Lyo , Masafumi Matsumura , Tetsuya Nagata , Fumitaka Nakamura , Hiroyuki Nakanishi , Nagayoshi Ohashi , Takashi Onaka , Harriet Parsons , Kate Pattle , Nicolas Peretto , Tae-Soo Pyo , Lei Qian , Ramprasad Rao , Mark G. Rawlings , Brendan Retter , John Richer , Andrew Rigby , Jean-François Robitaille , Hiro Saito , Giorgio Savini , Anna M. M. Scaife , Masumichi Seta , Hiroko Shinnaga , Archana Soam , Motohide Tamura , Ya-Wen Tang , Kohji Tomisaka , Yusuke Tsukamoto , Hongchi Wang , Jia-Wei Wang , Anthony P. Whitworth , Hsi-Wei Yen , Hyunju Yoo , Jinghua Yuan , Tetsuya Zenko , Chuan-Peng Zhang , Guoyin Zhang , Jianjun Zhou , Lei Zhu

In diffuse molecular clouds, possible precursors of star-forming clouds, the effect of the magnetic field is unclear. In this work we compare the orientations of filamentary structures in the Polaris Flare, as seen through dust emission by…

星系天体物理 · 物理学 2016-08-24 G. V. Panopoulou , I. Psaradaki , K. Tassis

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…

天体物理学 · 物理学 2009-10-31 Brenda C. Matthews , Christine D. Wilson

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 perform a comprehensive CO study toward the Monoceros OB1 (Mon OB1) region based on the MWISP survey at an angular resolution of about $50''$. The high-sensitivity data, together with the high dynamic range, shows that molecular gas in…

星系天体物理 · 物理学 2024-05-16 Zi Zhuang , Yang Su , Shiyu Zhang , Xuepeng Chen , Qing-Zeng Yan , Haoran Feng , Li Sun , Xiaoyun Xu , Yan Sun , Xin Zhou , Hongchi Wang , Ji Yang

The complete three-dimensional structure of the magnetic field within molecular clouds has eluded determination despite its high value in determining controlling factors in the star formation process, as it cannot be directly probed…

星系天体物理 · 物理学 2019-03-13 Che-Yu Chen , Patrick K. King , Zhi-Yun Li , Laura M. Fissel , Renato R. Mazzei

Context: Magnetic fields can play crucial roles in high-mass star formation. Nonetheless, the significance of magnetic fields at various scales and their relationship with gas structures is largely overlooked. Aims: Our goal is to examine…

星系天体物理 · 物理学 2024-06-21 Wenyu Jiao , Ke Wang , Fengwei Xu , Chao Wang , Henrik Beuther

Deep R-band CCD linear polarimetry collected for fields with lines-of-sight toward the Lupus I molecular cloud is used to investigate the properties of the magnetic field within this molecular cloud. The observed sample contains about 7000…

太阳与恒星天体物理 · 物理学 2015-05-01 G. A. P. Franco , F. O. Alves

(abridged) Together with gravity, turbulence, and stellar feedback, magnetic fields (B-fields) are thought to play a critical role in the evolution of molecular clouds and star formation processes. We aim to map the morphology and measure…

We present a detailed study of the magnetic field structure in the G111 molecular cloud, a ring-like filamentary cloud within the NGC 7538 region. We utilized interstellar dust polarization from the Planck telescope to trace large-scale…

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…

星系天体物理 · 物理学 2022-10-26 Ekta Sharma , Maheswar Gopinathan , Archana Soam , Chang Won Lee , T. R. Seshadri

The atomic interstellar medium (ISM) is observed to be full of linear structures that are referred to as "fibers". Fibers exhibit similar properties to linear structures found in molecular clouds known as striations. Suggestive of a similar…

星系天体物理 · 物理学 2019-03-19 Aris Tritsis , Christoph Federrath , Vasiliki Pavlidou

Multiscale studies of the morphology and strength of the magnetic field are crucial to properly unveil its role and relative importance in high-mass star and cluster formation. G31.41+0.31 (G31) is a hub-filament system that hosts a…

We started a multi-scale analysis of G202.3+2.5, an intertwined filamentary region of Monoceros OB1. In Paper I, we examined the distributions of dense cores and protostars and found enhanced star formation (SF) activity in the junction…

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
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