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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…

We report the first detection of an hourglass magnetic field aligned with a well-defined outflow-rotation system in a high-mass star-forming region. The observations were performed with Submillimeter Array toward G240.31+0.07, which harbors…

Astrophysics of Galaxies · Physics 2015-06-22 Keping Qiu , Qizhou Zhang , Karl M. Menten , Hauyu B. Liu , Ya-Wen Tang , Josep M. Girart

This paper presents the results of full polarization observations of the massive star-forming region W75N, conducted with 3 arcsec spatial resolutions at 345 GHz using the Submillimeter Array (SMA). The magnetic field structures in the…

Astrophysics of Galaxies · Physics 2023-07-13 Lingzhen Zeng , Qizhou Zhang , Felipe O. Alves , Tao-Chung Ching , Josep M. Girart , Junhao Liu

We measured polarized dust emission at 350um towards the high-mass star forming massive dense clump IRAS 20126+4104 using the SHARC II Polarimeter, SHARP, at the Caltech Submillimeter Observatory. Most of the observed magnetic field vectors…

We report 850~$\mu$m dust polarization observations of a low-mass ($\sim$12 $M_{\odot}$) starless core in the $\rho$ Ophiuchus cloud, Ophiuchus C, made with the POL-2 instrument on the James Clerk Maxwell Telescope (JCMT) as part of the…

Astrophysics of Galaxies · Physics 2019-05-29 Junhao Liu , Keping Qiu , David Berry , James Di Francesco , Pierre Bastien , Patrick M. Koch , Ray S. Furuya , Kee-Tae Kim , Simon Coudé , Chang Won Lee , Archana Soam , Chakali Eswaraiah , Di Li , Jihye Hwang , A-Ran Lyo , Kate Pattle , Tetsuo Hasegawa , Woojin Kwon , Shih-Ping Lai , Derek Ward-Thompson , Tao-Chung Ching , Zhiwei Chen , Qilao Gu , Dalei Li , Hua-bai Li , Hong-Li Liu , Lei Qian , Hongchi Wang , Jinghua Yuan , Chuan-Peng Zhang , Guoyin Zhang , Ya-Peng Zhang , Jianjun Zhou , Lei Zhu , Philippe André , Doris Arzoumanian , Yusuke Aso , Do-Young Byun , Michael Chun-Yuan Chen , Huei-Ru Vivien Chen , Wen Ping Chen , Jungyeon Cho , Minho Choi , Antonio Chrysostomou , Eun Jung Chung , Yasuo Doi , Emily Drabek-Maunder , C. Darren Dowell , 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 , Ilseung Han , Jennifer Hatchell , Saeko S. Hayashi , Thiem Hoang , Wayne Holland , Martin Houde , Tsuyoshi Inoue , Shu-ichiro Inutsuka , Kazunari Iwasaki , Il-Gyo Jeong , Doug Johnstone , Yoshihiro Kanamori , Ji-hyun Kang , Miju Kang , Sung-ju Kang , Akimasa Kataoka , Koji S. Kawabata , Francisca Kemper , Gwanjeong Kim , Jongsoo Kim , Kyoung Hee Kim , Mi-Ryang Kim , Shinyoung Kim , Jason M. Kirk , Masato I. N. Kobayashi , Takayoshi Kusune , Jungmi Kwon , Kevin M. Lacaille , Chin-Fei Lee , Jeong-Eun Lee , Hyeseung Lee , Sang-Sung Lee , Sheng-Yuan Liu , Tie Liu , Sven van Loo , Steve Mairs , Masafumi Matsumura , Brenda C. Matthews , Gerald H. Moriarty-Schieven , Tetsuya Nagata , Fumitaka Nakamura , Hiroyuki Nakanishi , Nagayoshi Ohashi , Takashi Onaka , Josh Parker , Harriet Parsons , Enzo Pascale , Nicolas Peretto , Andy Pon , Tae-Soo Pyo , 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 , Motohide Tamura , Ya-Wen Tang , Kohji Tomisaka , Yusuke Tsukamoto , Jia-Wei Wang , Anthony P. Whitworth , Hsi-Wei Yen , Hyunju Yoo , Tetsuya Zenko

We present the first ALMA dust polarization observations towards the high-mass star-forming regions W51 e2, e8, and W51 North in Band 6 (230 GHz) with a resolution around 0.26" ($\sim5$mpc). Polarized emission in all three sources is…

Astrophysics of Galaxies · Physics 2018-03-21 Patrick M. Koch , Ya-Wen Tang , Paul T. P. Ho , Hsi-Wei Yen , Yu-Nung Su , Shigehisa Takakuwa

Near-infrared (IR) imaging polarimetry in the J, H, and Ks bands has been carried out for the protostellar cluster region around NGC 2264 IRS 2 in the Monoceros OB1 molecular cloud. Various infrared reflection nebulae clusters (IRNCs)…

We present our observational results of the 0.87 mm polarized dust emission in the Class 0 protostar B335 obtained with the Atacama Large Millimeter/submillimeter Array (ALMA) at a 0.2" (20 au) resolution. We compared our data at 0.87 mm…

Solar and Stellar Astrophysics · Physics 2020-04-22 Hsi-Wei Yen , Bo Zhao , Patrick Koch , Ruben Krasnopolsky , Zhi-Yun Li , Nagayoshi Ohashi , Hsien Shang , Shigehisa Takakuwa , Ya-Wen Tang

We conducted near-infrared (JHKs) imaging polarimetry toward the infrared dark cloud (IRDC) M17 SWex, including almost all of the IRDC filaments as well as its outskirts, with the polarimeter SIRPOL on the IRSF 1.4 m telescope. We revealed…

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 present the first interferometric polarization map of the W51 e1/e2 molecular cores obtained with the BIMA array at 1.3 mm wavelength with approximately 3 arcsecond resolution. The polarization angle varies smoothly across the double…

Astrophysics · Physics 2009-11-06 Shih-Ping Lai , Richard M. Crutcher , Jose M. Girart , Ramprasad Rao

Interaction of three-dimensional magnetic fields, turbulence, and self-gravity in the molecular cloud is crucial in understanding star formation but has not been addressed so far. In this work, we target the low-mass star-forming region…

Astrophysics of Galaxies · Physics 2023-07-26 Yue Hu , Alex Lazarian

It has been proposed that the magnetic field, pervasive in the ISM, plays an important role in the process of massive star formation. To better understand its impact at the pre and protostellar stages, high-angular resolution observations…

Astrophysics of Galaxies · Physics 2020-09-30 C. Arce-Tord , F. Louvet , P. C. Cortes , F. Motte , C. L. H. Hull , V. J. M. Le Gouellec , G. Garay , T. Nony , P. Didelon , L. Bronfman

We present and analyze observations of polarized dust emission at 850 $\mu$m towards the central 1 pc $\times$ 1 pc hub-filament structure of Monoceros R2 (Mon R2). The data are obtained with SCUBA-2/POL-2 on the James Clerk Maxwell…

Astrophysics of Galaxies · Physics 2022-12-21 Jihye Hwang , Jongsoo Kim , Kate Pattle , Chang Won Lee , Patrick M. Koch , Doug Johnstone , Kohji Tomisaka , Anthony Whitworth , Ray S. Furuya , Ji-hyun Kang , A-Ran Lyo , Eun Jung Chung , Doris Arzoumanian , Geumsook Park , Woojin Kwon , Shinyoung Kim , Motohide Tamura , Jungmi Kwon , Archana Soam , Ilseung Han , Thiem Hoang , Kyoung Hee Kim , Takashi Onaka , Eswaraiah Chakali , Derek Ward-Thompson , Hong-Li Liu , Xindi Tang , Wen Ping Chen , Masafumi Matsumura , Thuong Duc Hoang , Zhiwei Chen , Valentin J. M. Le Gouellec , Florian Kirchschlager , Fr ed erick Poidevin , Pierre Bastien , Keping Qiu , Tetsuo Hasegawa , Shih-Ping Lai , Do-Young Byun , Jungyeon Cho , Minho Choi , Youngwoo Choi , Yunhee Choi , Il-Gyo Jeong , Miju Kang , Hyosung Kim , Kee-tae Kim , Jeong-Eun Lee , Sang-sung Lee , Yong-Hee Lee , Hyeseung Lee , Mi-Ryang Kim , Hyunju Yoo , Hyeong-Sik Yun , Mike Chen , James Di Francesco , Jason Fiege , Laura M. Fissel , Erica Franzmann , Martin Houde , Kevin Lacaille , Brenda Matthews , Sarah Sadavoy , Gerald Moriarty-Schieven , Mehrnoosh Tahani , Tao-Chung Ching , Y. Sophia Dai , Yan Duan , Qilao Gu , Chi-Yan Law , Dalei Li , Di Li , Guangxing Li , Hua-bai Li , Tie Liu , Xing Lu , Lei Qian , Hongchi Wang , Jintai Wu , Jinjin Xie , Jinghua Yuan , Chuan-Peng Zhang , Guoyin Zhang , Yapeng Zhang , Jianjun Zhou , Lei Zhu , David Berry , Per Friberg , Sarah Graves , Junhao Liu , Steve Mairs , Harriet Parsons , Mark Rawlings , Yasuo Doi , Saeko Hayashi , Charles L. H. Hull , Tsuyoshi Inoue , Shu-ichiro Inutsuka , Kazunari Iwasaki , Akimasa Kataoka , Koji Kawabata , Gwanjeong Kim , Masato I. N. Kobayashi , Tetsuya Nagata , Fumitaka Nakamura , Hiroyuki Nakanishi , Tae-Soo Pyo , Hiro Saito , Masumichi Seta , Yoshito Shimajiri , Hiroko Shinnaga , Yusuke Tsukamoto , Tetsuya Zenko , Huei-Ru Vivien Chen , Hao-Yuan Duan , Lapo Fanciullo , Francisca Kemper , Chin-Fei Lee , Sheng-Jun Lin , Sheng-Yuan Liu , Nagayoshi Ohashi , Ramprasad Rao , Ya-Wen Tang , Jia-Wei Wang , Meng-Zhe Yang , Hsi-Wei Yen , Tyler L. Bourke , Antonio Chrysostomou , Victor Debattista , David Eden , Stewart Eyres , Sam Falle , Gary Fuller , Tim Gledhill , Jane Greaves , Matt Griffin , Jennifer Hatchell , Janik Karoly , Jason Kirk , Vera Konyves , Steven Longmore , Sven van Loo , Ilse de Looze , Nicolas Peretto , Felix Priestley , Jonathan Rawlings , Brendan Retter , John Richer , Andrew Rigby , Giorgio Savini , Anna Scaife , Serena Viti , Pham Ngoc Diep , Nguyen Bich Ngoc , Le Ngoc Tram , Philippe Andre , Simon Coude , C. Darren Dowell , Rachel Friesen , Jean-Franc ois Robitaille

Kilogauss-strength magnetic fields are often observed in intergranular lanes at the photosphere in the quiet Sun. Such fields are stronger than the equipartition field $B_e$, corresponding to a magnetic energy density that matches the…

Astrophysics · Physics 2009-11-13 P. J. Bushby , S. M. Houghton , M. R. E. Proctor , N. O. Weiss

Context: Magnetic fields are thought to be one of the possible mechanisms responsible for shaping the generally spherical outflow of evolved stars into often aspherical planetary nebulae. However, direct measurements of magnetic fields…

Astrophysics · Physics 2009-11-13 W. H. T. Vlemmings , H. J. van Langevelde

We present the first far infrared (FIR) dust emission polarization map covering the full extent Milky Way's Central molecular zone (CMZ). The data, obtained with the PILOT balloon-borne experiment, covers the Galactic Center region…

We deploy and demonstrate the capabilities of the magnetic field model developed by Ewertowski & Basu (2013) by fitting observed polarimetry data of the prestellar core FeSt 1-457. The analytic hourglass magnetic field function derived…

Solar and Stellar Astrophysics · Physics 2021-04-21 Gianfranco Bino , Shantanu Basu

We present the SOFIA/HAWC+ 214 $\mu$m polarimetric observations toward the infrared dark cloud G351.77-0.53 (hereafter G351), complemented by existing multi-wavelength data sets. Infrared excess from the embedded sources indicate ongoing…

We present polarization observations of the dust continuum emission from IRAS 16293 which is a Class 0 protostar and is known to have at least two components, source A and B. These measurements were conducted by the Submillimeter Array…

Astrophysics of Galaxies · Physics 2014-11-20 Ramprasad Rao , Josep Miquel Girart , Daniel P. Marrone , Shih-Ping Lai , Scott Schnee