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We have carried out a statistical study of the average orientation of the magnetic field in solar filaments with respect to their axes for more than 400 samples, based on data taken with daily full-Sun, full-Stokes spectropolarimetric…

Solar and Stellar Astrophysics · Physics 2020-07-29 Yoichiro Hanaoka , Takashi Sakurai

We report spin filtration operation considering an antiferromagnetic helix system, possessing zero net magnetization. Common wisdom suggests that for such a system, a spin-polarized current is no longer available from a beam of unpolarized…

Mesoscale and Nanoscale Physics · Physics 2022-10-05 Debjani Das Gupta , Santanu K. Maiti

We present an analysis of the polarization of compact radio sources from six pointings of the Westerbork Synthesis Radio Telescope (WSRT) at 350 MHz with 35% coverage in lambda^2. After correcting for the off-axis instrumental polarization…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-27 Damon Farnsworth , Lawrence Rudnick , Shea Brown

If a single line of sight (LOS) intercepts multiple dust clouds of different spectral energy distributions and magnetic field orientations, the frequency scaling of each of the Stokes $Q$ and $U$ parameters of thermal dust emission may be…

Cosmology and Nongalactic Astrophysics · Physics 2021-03-10 V. Pelgrims , S. E. Clark , B. S. Hensley , G. V. Panopoulou , V. Pavlidou , K. Tassis , H. K. Eriksen , I. K. Wehus

The magnetic structure in the Galactic disk, the Galactic center and the Galactic halo can be delineated more clearly than ever before. In the Galactic disk, the magnetic structure has been revealed by starlight polarization within 2 or 3…

Astrophysics of Galaxies · Physics 2009-11-13 J. L. Han

Polarization of starlight and thermal dust emission due to aligned non-spherical grains helps us to trace magnetic field (B-field) morphology in molecular clouds and to study grain alignment mechanisms. In this work, we study grain…

Astrophysics of Galaxies · Physics 2025-01-22 Saikhom Pravash , Archana Soam , Pham Ngoc Diep , Thiem Hoang , Nguyen Bich Ngoc , Le Ngoc Tram

Maps of polarized dust emission of molecular clouds reveal the morphology of the magnetic field associated with star-forming regions. In particular, polarization maps of hub-filament systems show the distortion of magnetic field lines…

Astrophysics of Galaxies · Physics 2024-05-21 Domitilla Tapinassi , Daniele Galli , Marco Padovani , Henrik Beuther

Recent observations have identified hub-filament systems (HFSs) as the primary formation sites of massive stars and star clusters. Some HFSs are characterized by multiple filaments aligned radially toward a central high-density hub.…

Astrophysics of Galaxies · Physics 2026-03-04 Shingo Nozaki , Shu-ichiro Inutsuka

We present evidence for scale-independent misalignment of interstellar dust filaments and magnetic fields. We estimate the misalignment by comparing millimeter-wave dust-polarization measurements from Planck with filamentary structures…

Astrophysics of Galaxies · Physics 2023-05-01 Ari J. Cukierman , S. E. Clark , George Halal

Dust polarization orientations in molecular clouds often tend to be close to tangential to the Stokes $I$ dust continuum emission contours. The magnetic field and the emission gradient orientations, therefore, show some correlation. A…

Astrophysics of Galaxies · Physics 2015-06-03 Patrick M. Koch , Ya-Wen Tang , Paul T. P. Ho

We report the SOFIA/HAWC+ band D (154$\,\mu$m) and E (214$\,\mu$m) polarimetric observations of the filamentary structure OMC-3 that is part of the Orion molecular cloud. The polarization pattern is uniform for both bands and parallel to…

Astrophysics of Galaxies · Physics 2022-03-14 Niko Zielinski , Sebastian Wolf

We present the 850 $\mu$m polarization observations toward the IC5146 filamentary cloud taken using the Submillimetre Common-User Bolometer Array 2 (SCUBA-2) and its associated polarimeter (POL-2), mounted on the James Clerk Maxwell…

Astrophysics of Galaxies · Physics 2019-05-08 Jia-Wei Wang , Shih-Ping Lai , Chakali Eswaraiah , Kate Pattle , James Di Francesco , Doug Johnstone , Patrick M. Koch , Tie Liu , Motohide Tamura , Ray S. Furuya , Takashi Onaka , Derek Ward-Thompson , Archana Soam , Kee-Tae Kim , Chang Won Lee , Chin-Fei Lee , Steve Mairs , Doris Arzoumanian , Gwanjeong Kim , Thiem Hoang , Jihye Hwang , Sheng-Yuan Liu , David Berry , Pierre Bastien , Tetsuo Hasegawa , Woojin Kwon , Keping Qiu , Philippe André , Yusuke Aso , Do-Young Byun , Huei-Ru Chen , Michael C. Chen , Wen Ping Chen , Tao-Chung Ching , Jungyeon Cho , Minho Choi , Antonio Chrysostomou , Eun Jung Chung , Simon Coudé , Yasuo Doi , C. Darren Dowell , Emily Drabek-Maunder , Hao-Yuan Duan , Stewart P. S. Eyres , Sam Falle , Lapo Fanciullo , Jason Fiege , Erica Franzmann , Per Friberg , Rachel K. Friesen , Gary Fuller , Tim Gledhill , Sarah F. Graves , Jane S. Greaves , Matt J. Griffin , Qilao Gu , Ilseung Han , Jennifer Hatchell , Saeko S. Hayashi , Wayne Holland , Martin Houde , Tsuyoshi Inoue , Shu-ichiro Inutsuka , Kazunari Iwasaki , Il-Gyo Jeong , Yoshihiro Kanamori , Ji-hyun Kang , Miju Kang , Sung-ju Kang , Akimasa Kataoka , Koji S. Kawabata , Francisca Kemper , Jongsoo Kim , Kyoung Hee Kim , Mi-Ryang Kim , Shinyoung Kim , Jason M. Kirk , Masato I. N. Kobayashi , Vera Konyves , Jungmi Kwon , Kevin M. Lacaille , Hyeseung Lee , Jeong-Eun Lee , Sang-Sung Lee , Yong-Hee Lee , Dalei Li , Di Li , Hua-bai Li , Hong-Li Liu , Junhao Liu , A-Ran Lyo , Masafumi Matsumura , Brenda C. Matthews , Gerald H. Moriarty-Schieven , Tetsuya Nagata , Fumitaka Nakamura , Hiroyuki Nakanishi , Nagayoshi Ohashi , Geumsook Park , Harriet Parsons , Enzo Pascale , Nicolas Peretto , Andy Pon , Tae-Soo Pyo , Lei Qian , Ramprasad Rao , Mark G. Rawlings , Brendan Retter , John Richer , Andrew Rigby , Jean-François Robitaille , Sarah Sadavoy , Hiro Saito , Giorgio Savini , Anna M. M. Scaife , Masumichi Seta , Hiroko Shinnaga , Ya-Wen Tang , Kohji Tomisaka , Yusuke Tsukamoto , Sven van Loo , Hongchi Wang , Anthony P. Whitworth , Hsi-Wei Yen , Hyunju Yoo , Jinghua Yuan , Hyeong-Sik Yun , Tetsuya Zenko , Chuan-Peng Zhang , Guoyin Zhang , Ya-Peng Zhang , Jianjun Zhou , Zhu

Magnetic dipole emission (MDE) from interstellar magnetic nanoparticles is an important Galactic foreground in the microwave frequencies, and its polarization level may pose great challenges for achieving reliable measurements of cosmic…

Astrophysics of Galaxies · Physics 2016-05-10 Thiem Hoang , A. Lazarian

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

The nearby cloud L1642 is one of only two known very high latitude (|b| > 30 deg) clouds actively forming stars. It is a rare example of star formation in isolated conditions, and can reveal important details of star formation in general,…

Located in the Large Magellanic cloud and mostly irradiated by a massive-star cluster R$\,$136, 30 Doradus is an ideal target to test the leading theory of the grain alignment and rotational disruption by RAdiative Torques (RATs). Here, we…

Dust polarization observations from the Submillimeter Array (SMA) and the Caltech Submillimeter Observatory (CSO) are analyzed with the goal of providing a general tool to interpret the role of the magnetic field in molecular clouds.…

Astrophysics of Galaxies · Physics 2015-06-17 Patrick M. Koch , Ya-Wen Tang , Paul T. P. Ho

We present a novel statistical analysis aimed at deriving the intrinsic shapes and magnetic field orientations of molecular clouds using dust emission and polarization observations by the Hertz polarimeter. Our observables are the aspect…

Astrophysics of Galaxies · Physics 2015-05-13 K. Tassis , C. D. Dowell , R. H. Hildebrand , L. Kirby , J. E. Vaillancourt

Linear polarization of diffuse Galactic emission is a signature of magnetic fields in the interstellar medium of our Galaxy. Observations at high frequencies are less affected by Faraday depolarization than those at lower frequencies and…

Astrophysics of Galaxies · Physics 2015-05-27 L. Xiao , J. L. Han , W. Reich , X. H. Sun , R. Wielebinski , P. Reich , H. Shi , O. Lochner

We describe a recent full-polarization radio continuum survey, performed using the Westerbork Synthesis Radio Telescope (WSRT), of several nearby galaxies in the Spitzer Infrared Nearby Galaxies Survey (SINGS) sample. The WSRT-SINGS survey…

Astrophysics of Galaxies · Physics 2009-11-23 G. Heald , R. Braun
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