Institutional Repository of Radio Astronomy Research Laboratory
| Investigating Cold Dust Properties of 12 Nearby Dwarf Irregular Galaxies by Hierarchical Bayesian Spectral Energy Distribution Fitting | |
Chang, Zhengxue1,2 ; Zhou, Jianjun1,3; Lamperti, Isabella4,5,6; Saintongel, Amelie4; Esimbek, Jarken1,3; Li, Dalei1,3; He, Yuxin1,3; Qiu, Jianjie7; Li, Jun1,2; Zhou, Zeming8; Tang, Xindi1,3; Wu, Gang9; Ji, Weiguang1; Zhao, Mengke1,2; Zhou, Minhua10
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| 2021-07-01 | |
| Source Publication | Astrophysical Journal
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| ISSN | 0004-637X |
| Volume | 915Issue:1Pages:51 |
| Contribution Rank | 1 |
| Abstract | Combining infrared and submillimeter observations and applying a two-temperature modified blackbody (TMBB) model with a hierarchical Bayesian technique, we model the spectral energy distribution of 12 nearby dwarf irregular (dIrr) galaxies. We aim to probe potential submillimeter excess emission at 350, 500, and 850 mu m and investigate the properties of cold dust parameters. Based on the TMBB model with cold dust emissivity index (beta (c)) fixed to 2, one galaxy shows 500 mu m excess emission and nine galaxies show excess at 850 mu m (five of them still show 850 mu m excess in the case of free beta (c)). We find that the 850 mu m excess emission is easily detected in the dIrr galaxies with low star formation activity. The 850 mu m excess is more frequent and more prominent in dIrr galaxies with low molecular hydrogen gas mass fraction or low ratios between cold dust mass and gas mass. As galaxies evolve, the ratios between atomic hydrogen gas mass and stellar mass decrease and the 850 mu m excess emission tends to decrease or even disappear. Our results suggest that the cold dust temperature may increase, as the dIrr galaxies have more intense star formation or richer metallicity. There is a weak anticorrelation between the cold dust-to-stellar mass ratio and the specific star formation rate for our galaxies. |
| Keyword | interstellar-medium infrared-emission spinning dust separation continuum i. photometry masses noise model Astronomy & Astrophysics |
| Subtype | Article |
| DOI | 10.3847/1538-4357/abfe67 |
| URL | 查看原文 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000669655000001 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/4706 |
| Collection | 射电天文研究室_恒星形成与演化研究团组 |
| Affiliation | 1.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, 150 Science 1-Street, Urumqi, Xinjiang 830011, Peopleʼs Republic of China; 2.University of Chinese Academy of Sciences, No.19A Yuquan Road, Shijingshan District, Beijing, 100049, Peopleʼs Republic of China; 3.Key Laboratory of Radio Astronomy, Chinese Academy of Sciences 150 Science 1-Street, Urumqi, Xinjiang 830011, Peopleʼs Republic of China; 4.Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK; 5.European Southern Observatory, Karl-Schwarzschild-Strasse 2, D-85748 Garching bei München, Germany; 6.Centro de Astrobiología (CSIC-INTA), Ctra. de Ajalvir, Km 4, E-28850, Torrejón de Ardoz, Madrid, Spain; 7.School of Physics and Astronomy, Sun Yat-sen University, 2 Da Xue Road, Tangjia, Zhuhai 519000, Guangdong Province, People’s Republic of China; 8.Department of Astronomy, Beijing Normal University, Beijing, 100875, Peopleʼs Republic of China; 9.Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn, Germany; 10.School of Physics and Electronic Information, Shangrao Normal University, 401 Zhimin Road, Shangrao 334001, People’s Republic of China |
| First Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Chang, Zhengxue,Zhou, Jianjun,Lamperti, Isabella,et al. Investigating Cold Dust Properties of 12 Nearby Dwarf Irregular Galaxies by Hierarchical Bayesian Spectral Energy Distribution Fitting[J]. Astrophysical Journal,2021,915(1):51. |
| APA | Chang, Zhengxue.,Zhou, Jianjun.,Lamperti, Isabella.,Saintongel, Amelie.,Esimbek, Jarken.,...&Zhou, Minhua.(2021).Investigating Cold Dust Properties of 12 Nearby Dwarf Irregular Galaxies by Hierarchical Bayesian Spectral Energy Distribution Fitting.Astrophysical Journal,915(1),51. |
| MLA | Chang, Zhengxue,et al."Investigating Cold Dust Properties of 12 Nearby Dwarf Irregular Galaxies by Hierarchical Bayesian Spectral Energy Distribution Fitting".Astrophysical Journal 915.1(2021):51. |
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| Chang-2021-Investiga（4819KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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