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Cold Dust Properties and Submillimeter Excess in 33 Nearby Spiral Galaxies

文献类型：期刊论文

作者Chang, Zhengxue17; Zhou, Jianjun14,15,16; Lamperti, Isabella11,12,13; Saintonge, Amelie1,10; Zeng, Xiangyun8,9; Wang, Shumin17; Esimbek, Jarken14,15,16; Shi, Ruimin17; Qiu, Jianjie6,7; Zhao, Na17
刊名ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
出版日期2026-03-01
卷号283期号:1页码:17
ISSN号0067-0049
DOI10.3847/1538-4365/ae3750
通讯作者Chang, Zhengxue(changzx520@163.com)
英文摘要The origin of submillimeter excess in galaxies remains unclear. We analyze cold dust properties of 33 nearby spiral galaxies, identify a possible 850 mu m excess, and explore its environments. Spectral energy distributions are fitted using a hierarchical Bayesian framework with three modified blackbody models: single temperature (SMBB), two temperature (TMBB), and broken emissivity. With a standard value of the cold dust emissivity index (beta(c) = 2), 13 galaxies exhibit 850 mu m excess using SMBB and TMBB. With decreasing beta(c), the submillimeter excess still persists: at beta(c) = 1.8, 10 (SMBB) and nine (TMBB) galaxies retain the submillimeter excess; at beta(c) = 1.5, six galaxies remain in the submillimeter excess. Even when beta(c) is free, some galaxies still show 850 mu m excess, suggesting the submillimeter excess arises from intrinsic dust properties rather than modeling artifacts. Submillimeter excess correlates with metallicity, being more likely to occur in low-metal galaxies. A low 160-to-850 mu m flux ratio (typically <50-70) may serve as a criteria for selecting candidate galaxies with submillimeter excess. Based on TMBB, cold dust temperature correlates positively with molecular gas fraction ( logM(H2)/M-* ) and specific star formation rate (sSFR). The cold dust emissivity index shows positive correlations with star formation rate, stellar mass, oxygen abundance, and logM(H2)/M-*, and a negative correlation with atomic gas fraction. Cold dust-to-stellar mass ratio correlates positively with gas fraction and sSFR, and anticorrelates with stellar mass. These results provide constraints on the nature of submillimeter excess and physical properties of cold dust in spiral galaxies.
WOS关键词MASS ABSORPTION-COEFFICIENT ; INTERSTELLAR DUST ; MAGELLANIC CLOUDS ; INFRARED-EMISSION ; CENTIMETER EXCESS ; STAR-FORMATION ; II. DUST ; HERSCHEL ; GAS ; I.
资助项目National Natural Science foundation of China[12303027] ; National Natural Science foundation of China[12373029] ; Natural Science Foundation of Hebei Province[A2022109001] ; PRIN-MUR project PROMETEUS ; European Union-Next Generation EU ; Mission 4 Component 1 CUP[B53D23004750006] ; National Natural Science Foundation of China[12203029] ; National Natural Science Foundation of China[2025AFB551] ; NSFC[12463006] ; National Key R&D Program of China[2022YFA1603103] ; Xinjiang Key Laboratory of Radio Astrophysics[2023D04033] ; Science Research Project of Hebei Education Department[QN2023253] ; Science and Technology Research Program of Higher Education Institutions in Hebei Province[QN2024053] ; Handan Municipal Science and Technology Research and Development Program Project[23422304070] ; Natural Science Research Program of Handan University[XZ2020202]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001696125400001
出版者IOP Publishing Ltd
资助机构National Natural Science foundation of China ; Natural Science Foundation of Hebei Province ; PRIN-MUR project PROMETEUS ; European Union-Next Generation EU ; Mission 4 Component 1 CUP ; National Natural Science Foundation of China ; NSFC ; National Key R&D Program of China ; Xinjiang Key Laboratory of Radio Astrophysics ; Science Research Project of Hebei Education Department ; Science and Technology Research Program of Higher Education Institutions in Hebei Province ; Handan Municipal Science and Technology Research and Development Program Project ; Natural Science Research Program of Handan University
源URL[http://ir.xao.ac.cn/handle/45760611-7/8605]  
专题恒星形成与演化研究团组
通讯作者Chang, Zhengxue
作者单位1.Max Planck Inst Radioastron, Auf dem Hugel 69, D-53121 Bonn, Germany
2.Jiujiang Univ, Coll Sci, Jiujiang 332000, Peoples R China
3.Hebei Normal Univ, Guoshoujing Inst Astron, Shijiazhuang Key Lab Astron & Space Sci, Shijiazhuang 050024, Hebei, Peoples R China
4.Hebei Normal Univ, Coll Phys, 20 South Erhuan Rd, Shijiazhuang 050024, Peoples R China
5.Qiannan Normal Univ Nationalities, Duyun 558000, Peoples R China
6.Jinggangshan Univ, Inst Astron & Astrophys, Dept Phys, Jian 343009, Peoples R China
7.Jinggangshan Univ, Sch Math & Phys, 28 Xueyuan Rd, Jian 343009, Jiangxi, Peoples R China
8.China Three Gorges Univ, Coll Math & Phys, Yichang 443000, Peoples R China
9.China Three Gorges Univ, Ctr Astron & Space Sci, Yichang 443000, Peoples R China
10.UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England
推荐引用方式
GB/T 7714		 Chang, Zhengxue,Zhou, Jianjun,Lamperti, Isabella,et al. Cold Dust Properties and Submillimeter Excess in 33 Nearby Spiral Galaxies[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2026,283(1):17.
APA Chang, Zhengxue.,Zhou, Jianjun.,Lamperti, Isabella.,Saintonge, Amelie.,Zeng, Xiangyun.,...&Liu, Xiaona.(2026).Cold Dust Properties and Submillimeter Excess in 33 Nearby Spiral Galaxies.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,283(1),17.
MLA Chang, Zhengxue,et al."Cold Dust Properties and Submillimeter Excess in 33 Nearby Spiral Galaxies".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 283.1(2026):17.

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来源：新疆天文台

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