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Dust spectrum and polarisation at 850 mu m in the massive IRDC G035.39-00.33

文献类型：期刊论文

作者Juvela, Mika16; Guillet, Vincent17,18; Liu, Tie2,19; Ristorcelli, Isabelle1,3; Pelkonen, Veli-Matti16; Alina, Dana4; Bronfman, Leonardo5; Eden, David J.6; Kim, Kee Tae19; Koch, Patrick M.7
刊名ASTRONOMY & ASTROPHYSICS
出版日期2018-11-23
卷号620页码:29
ISSN号1432-0746
关键词ISM: clouds infrared: ISM submillimeter: ISM dust, extinction stars: formation stars: protostars
DOI10.1051/0004-6361/201833245
英文摘要Context. The sub-millimetre polarisation of dust emission from star-forming clouds carries information on grain properties and on the effects that magnetic fields have on cloud evolution. Aims. Using observations of a dense filamentary cloud G035.39-00.33, we aim to characterise the dust emission properties and the variations of the polarisation fraction. Methods. JCMT SCUBA-2/POL-2 observations at 850 mu m were combined with Planck 850 mu m (353 GHz) data to map polarisation fraction at small and large scales. With previous total intensity SCUBA-2 observations (450 and 850 mu m) and Herschel data, the column densities were determined via modified black-body fits and via radiative transfer modelling. Models were constructed to examine how the observed polarisation angles and fractions depend on potential magnetic field geometries and grain alignment processes. Results. POL-2 data show clear changes in the magnetic field orientation. These are not in contradiction with the uniform orientation and almost constant polarisation fraction seen by Planck, because of the difference in the beam sizes and the POL-2 data being affected by spatial filtering. The filament has a peak column density of N(H-2) similar to 7 x 10(22) cm(-2), a minimum dust temperature of T similar to 12 K, and a mass of similar to 4300 M-circle dot for the area N(H-2) > 5 x 10(21) cm(-2). The estimated average value of the dust opacity spectral index is beta similar to 1.9. The ratio of sub-millimetre and J-band optical depths is tau (250 mu m)/tau(J) similar to 2.5 x 10(-3), more than four times the typical values for diffuse medium. The polarisation fraction decreases as a function of column density to p similar to 1% in the central filament. Because of noise, the observed decrease of p(N) is significant only at N(H-2) > 2 x 10(22) cm(-2). The observations suggest that the grain alignment is not constant. Although the data can be explained with a complete loss of alignment at densities above similar to 10(4) cm(-3) or using the predictions of radiative torques alignment, the uncertainty of the field geometry and the spatial filtering of the SCUBA-2 data prevent strong conclusions. Conclusions. The G035.39-00.33 filament shows strong signs of dust evolution and the low polarisation fraction is suggestive of a loss of polarised emission from its densest parts.
WOS关键词GOULD BELT SURVEY ; MAGNETIC-FIELD ; GRAIN ALIGNMENT ; MOLECULAR CLOUD ; DARK CLOUD ; RADIATIVE TORQUES ; INFRARED OBSERVATIONS ; SCUBA-2 OBSERVATIONS ; TAURUS ; POLARIMETRY
资助项目Chinese Academy of Sciences[XDB09000000] ; Science and Technology Facilities Council of the United Kingdom ; Canada Foundation for Innovation ; ESA member states ; NASA (USA) ; Denmark ; National Aeronautics and Space Administration's Earth Science Technology Office, Computational Technologies Project[NCCS-626] ; Canadian Space Agency ; Academy of Finland[285769] ; KASI fellowship ; EACOA fellowship ; European Research Council[320773] ; CONICYT[AFB-170002] ; Basic Science Research Program through the National Research Foundation of Korea[NRF-2016R1C1B2013642] ; Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology[NRF-2016R1A2B4012593] ; ERC-2015-STG[679852] ; Programme National Physique et Chimie du Milieu Interstellaire (PCMI) of CNRS/INSU ; INC/INP ; CEA ; CNES
WOS研究方向Astronomy & Astrophysics
语种英语
出版者EDP SCIENCES S A
WOS记录号WOS:000451110200006
资助机构Chinese Academy of Sciences ; Chinese Academy of Sciences ; Science and Technology Facilities Council of the United Kingdom ; Science and Technology Facilities Council of the United Kingdom ; Canada Foundation for Innovation ; Canada Foundation for Innovation ; ESA member states ; ESA member states ; NASA (USA) ; NASA (USA) ; Denmark ; Denmark ; National Aeronautics and Space Administration's Earth Science Technology Office, Computational Technologies Project ; National Aeronautics and Space Administration's Earth Science Technology Office, Computational Technologies Project ; Canadian Space Agency ; Canadian Space Agency ; Academy of Finland ; Academy of Finland ; KASI fellowship ; KASI fellowship ; EACOA fellowship ; EACOA fellowship ; European Research Council ; European Research Council ; CONICYT ; CONICYT ; Basic Science Research Program through the National Research Foundation of Korea ; Basic Science Research Program through the National Research Foundation of Korea ; Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology ; Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology ; ERC-2015-STG ; ERC-2015-STG ; Programme National Physique et Chimie du Milieu Interstellaire (PCMI) of CNRS/INSU ; Programme National Physique et Chimie du Milieu Interstellaire (PCMI) of CNRS/INSU ; INC/INP ; INC/INP ; CEA ; CEA ; CNES ; CNES ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Science and Technology Facilities Council of the United Kingdom ; Science and Technology Facilities Council of the United Kingdom ; Canada Foundation for Innovation ; Canada Foundation for Innovation ; ESA member states ; ESA member states ; NASA (USA) ; NASA (USA) ; Denmark ; Denmark ; National Aeronautics and Space Administration's Earth Science Technology Office, Computational Technologies Project ; National Aeronautics and Space Administration's Earth Science Technology Office, Computational Technologies Project ; Canadian Space Agency ; Canadian Space Agency ; Academy of Finland ; Academy of Finland ; KASI fellowship ; KASI fellowship ; EACOA fellowship ; EACOA fellowship ; European Research Council ; European Research Council ; CONICYT ; CONICYT ; Basic Science Research Program through the National Research Foundation of Korea ; Basic Science Research Program through the National Research Foundation of Korea ; Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology ; Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology ; ERC-2015-STG ; ERC-2015-STG ; Programme National Physique et Chimie du Milieu Interstellaire (PCMI) of CNRS/INSU ; Programme National Physique et Chimie du Milieu Interstellaire (PCMI) of CNRS/INSU ; INC/INP ; INC/INP ; CEA ; CEA ; CNES ; CNES ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Science and Technology Facilities Council of the United Kingdom ; Science and Technology Facilities Council of the United Kingdom ; Canada Foundation for Innovation ; Canada Foundation for Innovation ; ESA member states ; ESA member states ; NASA (USA) ; NASA (USA) ; Denmark ; Denmark ; National Aeronautics and Space Administration's Earth Science Technology Office, Computational Technologies Project ; National Aeronautics and Space Administration's Earth Science Technology Office, Computational Technologies Project ; Canadian Space Agency ; Canadian Space Agency ; Academy of Finland ; Academy of Finland ; KASI fellowship ; KASI fellowship ; EACOA fellowship ; EACOA fellowship ; European Research Council ; European Research Council ; CONICYT ; CONICYT ; Basic Science Research Program through the National Research Foundation of Korea ; Basic Science Research Program through the National Research Foundation of Korea ; Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology ; Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology ; ERC-2015-STG ; ERC-2015-STG ; Programme National Physique et Chimie du Milieu Interstellaire (PCMI) of CNRS/INSU ; Programme National Physique et Chimie du Milieu Interstellaire (PCMI) of CNRS/INSU ; INC/INP ; INC/INP ; CEA ; CEA ; CNES ; CNES ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; Science and Technology Facilities Council of the United Kingdom ; Science and Technology Facilities Council of the United Kingdom ; Canada Foundation for Innovation ; Canada Foundation for Innovation ; ESA member states ; ESA member states ; NASA (USA) ; NASA (USA) ; Denmark ; Denmark ; National Aeronautics and Space Administration's Earth Science Technology Office, Computational Technologies Project ; National Aeronautics and Space Administration's Earth Science Technology Office, Computational Technologies Project ; Canadian Space Agency ; Canadian Space Agency ; Academy of Finland ; Academy of Finland ; KASI fellowship ; KASI fellowship ; EACOA fellowship ; EACOA fellowship ; European Research Council ; European Research Council ; CONICYT ; CONICYT ; Basic Science Research Program through the National Research Foundation of Korea ; Basic Science Research Program through the National Research Foundation of Korea ; Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology ; Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology ; ERC-2015-STG ; ERC-2015-STG ; Programme National Physique et Chimie du Milieu Interstellaire (PCMI) of CNRS/INSU ; Programme National Physique et Chimie du Milieu Interstellaire (PCMI) of CNRS/INSU ; INC/INP ; INC/INP ; CEA ; CEA ; CNES ; CNES
源URL[http://ir.bao.ac.cn/handle/114a11/23633]  
专题中国科学院国家天文台
通讯作者Juvela, Mika
作者单位1.CNRS, IRAP, 9 Ave Colonel Roche,BP 44346, F-31028 Toulouse 4, France
2.East Asian Observ, 660 N Aohoku Pl, Hilo, HI 96720 USA
3.Univ Toulouse, UPS OMP, IRAP, F-31028 Toulouse 4, France
4.Nazarbayev Univ, Sch Sci & Technol, Dept Phys, Astana 010000, Kazakhstan
5.Univ Chile, Dept Astron, Casilla 36-D, Santiago, Chile
6.Liverpool John Moores Univ, Astrophys Res Inst, Ic2,Liverpool Sci Pk,146 Brownlow Hill, Liverpool L3 5RF, Merseyside, England
7.Acad Sinica, Inst Astron & Astrophys, Taipei, Taiwan
8.Korea Univ Sci & Technol, 217 Gajang Ro, Daejeon 34113, South Korea
9.Univ Franche Comte, OSU THETA, CNRS UMR 6213, Inst UTINAM, 41Bis Ave Observ, F-25000 Besancon, France
10.Natl Inst Nat Sci, Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan
推荐引用方式
GB/T 7714		 Juvela, Mika,Guillet, Vincent,Liu, Tie,et al. Dust spectrum and polarisation at 850 mu m in the massive IRDC G035.39-00.33[J]. ASTRONOMY & ASTROPHYSICS,2018,620:29.
APA Juvela, Mika.,Guillet, Vincent.,Liu, Tie.,Ristorcelli, Isabelle.,Pelkonen, Veli-Matti.,...&Zhang, Chuan-Peng.(2018).Dust spectrum and polarisation at 850 mu m in the massive IRDC G035.39-00.33.ASTRONOMY & ASTROPHYSICS,620,29.
MLA Juvela, Mika,et al."Dust spectrum and polarisation at 850 mu m in the massive IRDC G035.39-00.33".ASTRONOMY & ASTROPHYSICS 620(2018):29.

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