Herschel and SCUBA-2 observations of dust emission in a sample of Planck cold clumps
Juvela, Mika1; He, Jinhua2,3,4,5; Pattle, Katherine6; Liu, Tie7,8; Bendo, George9; Eden, David J.10; Feher, Orsolya11,12; Fich, Michel13; Fuller, Gary9; Hirano, Naomi14; Kim, Kee-Tae7; Li, Di15,16; Liu, Sheng-Yuan14; Malinen, Johanna17; Marshall, Douglas J.18; Paradis, Deborah19,20; Parsons, Harriet8; Pelkonen, Veli-Matti1; Rawlings, Mark G.8; Ristorcelli, Isabelle19,20; Samal, Manash R.21; Tatematsu, Ken'ichi22; Thompson, Mark23; Traficante, Alessio24; Wang, Ke25; Ward-Thompson, Derek; Wu, Yuefang26; Yi, Hee-Weon27; Yoo, Hyunju28
Corresponding AuthorJuvela, Mika(
AbstractContext. 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.
KeywordISM: clouds Infrared: ISM Submillimetre: ISM dust, extinction Stars: formation Stars: protostars
Indexed BySCI
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000430955300006
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Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorJuvela, Mika
Affiliation1.Univ Helsinki, Dept Phys, POB 64, Helsinki 00014, Finland
2.Chinese Acad Sci, Yunnan Obser, 396 Yangfangwang, Kunming 650216, Yunnan, Peoples R China
3.Chinese Acad Sci, China Chile Joint Ctr Astron, South Amer Ctr Astron, Camino El Observ 1515, Santiago, Chile
4.Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, 396 Yangfangwang, Kunming 650216, Yunnan, Peoples R China
5.Chinese Acad Sci, Ctr Astron Mega Sci, 20A Datun Rd, Beijing 100012, Peoples R China
6.Univ Cent Lancashire, Jeremiah Horrocks Inst, Preston PR1 2HE, Lancs, England
7.Korea Astron & Space Sci Inst, 776 Daedeokdaero, Daejeon 34055, South Korea
8.East Asian Observ, 660 N Aohoku Pl, Hilo, HI 96720 USA
9.Univ Manchester, Jodrell Bank Ctr Astrophys, UK ALMA Reg Ctr Node, Oxford Rd, Manchester M13 9PL, Lancs, England
10.Liverpool John Moores Univ, Astrophys Res Inst, Ic2,Liverpool Sci Pk,146 Brownlow Hill, Liverpool L3 5RF, Merseyside, England
11.Hungarian Acad Sci, Res Ctr Astron & Earth Sci, Konkoly Observ, Konkoly Thege Miklos Ut 15-17, H-1121 Budapest, Hungary
12.Eovos Lorand Univ, Dept Astron, Pazmany Peter Setany 1-A, Budapest, Hungary
13.Univ Waterloo, Dept Phys & Astron, Waterloo, ON N2L 3G1, Canada
14.Acad Sinica, Inst Astron & Astrophys, 11F Astron Math Bldg,AS-NTU 1,Sec 4,Roosevelt Rd, Taipei 10617, Taiwan
15.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
16.Chinese Acad Sci, Key Lab Radio Astron, Nanjing 210008, Jiangsu, Peoples R China
17.Univ Cologne, Inst Phys 1, Cologne, Germany
18.Univ Paris Diderot, CEA Saclay, CNRS, Lab AIM,IRFU Serv Astrophys,CEA DSM, Bat 709, F-91191 Gif Sur Yvette, France
19.Univ Toulouse, UPS OMP, IRAP, F-31028 Toulouse 4, France
20.CNRS, IRAP, 9 Av Colonel Roche,BP 44346, F-31028 Toulouse, France
21.Natl Cent Univ 300, Grad Inst Astron, Taoyuan 32001, Taiwan
22.Natl Inst Nat Sci, Natl Astron Observ Japan, Nobeyama Radio Observ, Minamisa Ku, 462-2 Nobeyama, Minamimaki, Tochigi 3841305, Japan
23.Univ Hertfordshire, Sch Phys Astron & Math, Ctr Astrophys Res, Coll Lane, Hatfield AL10 9AB, Herts, England
24.IAPS INAF, Via Fosso Cavaliere 100, I-00133 Rome, Italy
25.European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany
26.Peking Univ, Dept Astron, Beijing 100871, Peoples R China
27.Kyung Hee Univ, Sch Space Res, 1732 Deogyeong Daero, Yongin, Gyeonggi Do, South Korea
28.Chungnam Natl Univ, Dept Astron & Space Sci, 99 Daehak Ro, Daejeon 34134, South Korea
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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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