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Herschel and SCUBA-2 observations of dust emission in a sample of Planck cold clumps

文献类型：期刊论文

作者Juvela, Mika2; He, Jinhua3,4,5,6; Pattle, Katherine7; Liu, Tie8,9; Bendo, George10; Eden, David J.11; Feher, Orsolya1,12; Fich, Michel13; Fuller, Gary10; Hirano, Naomi14
刊名ASTRONOMY & ASTROPHYSICS
出版日期2018-04-27
卷号612页码:38
关键词ISM: clouds Infrared: ISM Submillimetre: ISM dust, extinction Stars: formation Stars: protostars
ISSN号1432-0746
DOI10.1051/0004-6361/201731921
英文摘要Context. Analysis of all-sky Planck submillimetre observations and the IRAS 100 mu m data has led to the detection of a population of Galactic cold clumps. The clumps can be used to study star formation and dust properties in a wide range of Galactic environments. Aims. Our aim is to measure dust spectral energy distribution ( SED) variations as a function of the spatial scale and the wavelength. Methods. We examined the SEDs at large scales using IRAS, Planck, and Herschel data. At smaller scales, we compared JCMT/SCUBA-2 850 mu m maps with Herschel data that were filtered using the SCUBA-2 pipeline. Clumps were extracted using the Fellwalker method, and their spectra were modelled as modified blackbody functions. Results. According to IRAS and Planck data, most fields have dust colour temperatures T-C similar to 14-18K and opacity spectral index values of beta = 1.5-1.9. The clumps and cores identified in SCUBA-2 maps have T similar to 13K and similar beta values. There are some indications of the dust emission spectrum becoming flatter at wavelengths longer than 500 mu m. In fits involving Planck data, the significance is limited by the uncertainty of the corrections for CO line contamination. The fits to the SPIRE data give a median beta value that is slightly above 1.8. In the joint SPIRE and SCUBA-2 850 mu m fits, the value decreases to beta similar to 1.6. Most of the observed T-beta anticorrelation can be explained by noise. Conclusions. The typical submillimetre opacity spectral index fi of cold clumps is found to be similar to 1.7. This is above the values of diffuse clouds, but lower than in some previous studies of dense clumps. There is only tentative evidence of a T-beta anticorrelation and beta decreasing at millimetre wavelengths.
WOS关键词SPECTRAL INDEX ; TEMPERATURE-DEPENDENCE ; DARK CLOUDS ; DENSE CORES ; JCMT ; FIELD ; CATALOG ; MASSES ; NOISE ; MAPS
资助项目Chinese Academy of Sciences[XDB09000000] ; Science and Technology Facilities Council of the United Kingdom ; Canada Foundation for Innovation ; National Aeronautics and Space Administration's Earth Science Technology Office[NCC5-626] ; ESO-ARO programme[196.C-0999(A)] ; Academy of Finland[285769] ; KASI fellowship ; EACOA fellowship ; ERC-STG[679852 RADFEEDBACK] ; European Research Council[320773]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000430955300006
出版者EDP SCIENCES S A
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 ; National Aeronautics and Space Administration's Earth Science Technology Office ; National Aeronautics and Space Administration's Earth Science Technology Office ; ESO-ARO programme ; ESO-ARO programme ; Academy of Finland ; Academy of Finland ; KASI fellowship ; KASI fellowship ; EACOA fellowship ; EACOA fellowship ; ERC-STG ; ERC-STG ; European Research Council ; European Research Council ; 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 ; National Aeronautics and Space Administration's Earth Science Technology Office ; National Aeronautics and Space Administration's Earth Science Technology Office ; ESO-ARO programme ; ESO-ARO programme ; Academy of Finland ; Academy of Finland ; KASI fellowship ; KASI fellowship ; EACOA fellowship ; EACOA fellowship ; ERC-STG ; ERC-STG ; European Research Council ; European Research Council ; 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 ; National Aeronautics and Space Administration's Earth Science Technology Office ; National Aeronautics and Space Administration's Earth Science Technology Office ; ESO-ARO programme ; ESO-ARO programme ; Academy of Finland ; Academy of Finland ; KASI fellowship ; KASI fellowship ; EACOA fellowship ; EACOA fellowship ; ERC-STG ; ERC-STG ; European Research Council ; European Research Council ; 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 ; National Aeronautics and Space Administration's Earth Science Technology Office ; National Aeronautics and Space Administration's Earth Science Technology Office ; ESO-ARO programme ; ESO-ARO programme ; Academy of Finland ; Academy of Finland ; KASI fellowship ; KASI fellowship ; EACOA fellowship ; EACOA fellowship ; ERC-STG ; ERC-STG ; European Research Council ; European Research Council
源URL[http://ir.bao.ac.cn/handle/114a11/21257]  
专题中国科学院国家天文台
通讯作者Juvela, Mika
作者单位1.Hungarian Acad Sci, Res Ctr Astron & Earth Sci, Konkoly Observ, Konkoly Thege Miklos Ut 15-17, H-1121 Budapest, Hungary
2.Univ Helsinki, Dept Phys, POB 64, Helsinki 00014, Finland
3.Chinese Acad Sci, Yunnan Obser, 396 Yangfangwang, Kunming 650216, Yunnan, Peoples R China
4.Chinese Acad Sci, China Chile Joint Ctr Astron, South Amer Ctr Astron, Camino El Observ 1515, Santiago, Chile
5.Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, 396 Yangfangwang, Kunming 650216, Yunnan, Peoples R China
6.Chinese Acad Sci, Ctr Astron Mega Sci, 20A Datun Rd, Beijing 100012, Peoples R China
7.Univ Cent Lancashire, Jeremiah Horrocks Inst, Preston PR1 2HE, Lancs, England
8.Korea Astron & Space Sci Inst, 776 Daedeokdaero, Daejeon 34055, South Korea
9.East Asian Observ, 660 N Aohoku Pl, Hilo, HI 96720 USA
10.Univ Manchester, Jodrell Bank Ctr Astrophys, UK ALMA Reg Ctr Node, Oxford Rd, Manchester M13 9PL, Lancs, England
推荐引用方式
GB/T 7714		 Juvela, Mika,He, Jinhua,Pattle, Katherine,et al. Herschel and SCUBA-2 observations of dust emission in a sample of Planck cold clumps[J]. ASTRONOMY & ASTROPHYSICS,2018,612:38.
APA Juvela, Mika.,He, Jinhua.,Pattle, Katherine.,Liu, Tie.,Bendo, George.,...&Yoo, Hyunju.(2018).Herschel and SCUBA-2 observations of dust emission in a sample of Planck cold clumps.ASTRONOMY & ASTROPHYSICS,612,38.
MLA Juvela, Mika,et al."Herschel and SCUBA-2 observations of dust emission in a sample of Planck cold clumps".ASTRONOMY & ASTROPHYSICS 612(2018):38.

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