Components of star formation in NGC 253: Non-negative matrix factorization analysis with the ALCHEMI integrated intensity images
文献类型：期刊论文
| 作者 | Kishikawa, Ryo2; Harada, Nanase3,4; Saito, Toshiki5,6; Aalto, Susanne; Colzi, Laura7; Gorski, Mark8,9; Henkel, Christian1,10 ; Mangum, Jeffrey G.11; Martin, Sergio12,13; Muller, Sebastian6
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| 刊名 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
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| 出版日期 | 2024-11-29 |
| 页码 | 20 |
| 关键词 | galaxies: starburst galaxies: star formation galaxies: individual (NGC 253) ISM: molecules methods: data analysis |
| ISSN号 | 0004-6264 |
| DOI | 10.1093/pasj/psae095 |
| 产权排序 | 10 |
| 英文摘要 | It is essential to examine the physical or chemical properties of molecular gas in starburst galaxies to reveal the underlying mechanisms characterizing starbursts. We used non-negative matrix factorization (NMF) to extract individual molecular or physical components involved in the star formation process in NGC 253. We used images of 148 transitions from 44 different species of the ALMA large program ALCHEMI. Additionally, we included the continuum images at ALMA Bands 3 and 7 from the same dataset. For the five NMF components (NF1-NF5), we obtained that their distributions correspond to various basic phenomena related to star formation: (i) low-density gas extended through the galactic central molecular zone (NF2), (ii) shocks (NF3), (iii) starburst regions (NF4), and (iv) young star-forming regions (NF5). The other component (NF1) is related to excitation; three components obtained by NMF (NF3, NF1, and NF5) show a strong dependence upon the upper state energies of transitions, and represent low, intermediate, and high excitation, respectively. We also compared our results using principal component analysis (PCA) previously applied to the same dataset. Molecular components extracted from NMF are similar to the ones obtained from PCA. However, NMF is better at extracting components associated with a single physical component, while a single component in PCA usually contains information on multiple physical components. This is especially true for features with weak intensities like emission from outflows. Our results suggest that NMF can be one of the promising methods for interpreting molecular line survey data, especially in the upcoming era of wide-band receivers. |
| WOS关键词 | CENTRAL MOLECULAR ZONE ; STARBURST ; OUTFLOW ; GAS ; EMISSION ; GALAXIES ; METHANOL ; DIAGNOSTICS ; CLUSTERS ; FEEDBACK |
| 资助项目 | National Astronomical Observatory of Japan[2018.1.00162] ; ALMA ; National Astronomical Observatory of Japan[JP23K13140] ; National Astronomical Observatory of Japan[JP23K20035] ; JSPS KAKENHI |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001367251300001 |
| 出版者 | OXFORD UNIV PRESS |
| 资助机构 | National Astronomical Observatory of Japan ; ALMA ; National Astronomical Observatory of Japan ; JSPS KAKENHI |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/7245]  |
| 专题 | 研究单元未命名 恒星形成与演化研究团组 |
| 通讯作者 | Kishikawa, Ryo |
| 作者单位 | 1.Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany 2.Tokyo Metropolitan Univ, Dept Phys, 1-1 Minami Osawa, Hachioji, Tokyo 1920397, Japan 3.Natl Astron Observ Japan, Mitaka, 1818588, Japan 4.SOKENDAI, Grad Inst Adv Studies, Astron Sci Program, 2-21-1 Osawa, Mitaka, Tokyo 1811855, Japan 5.Shizuoka Univ, Fac Global Interdisciplinary Sci & Innovat, 836 Ohya, Suruga Ku, Shizuoka 4228529, Japan 6.Chalmers Univ Technol, Dept Space Earth & Environm, Onsala Space Observ, Onsala, Sweden 7.CSIC INTA, Ctr Astrobiol CAB, Ctra Ajalvir Km 4, Madrid 28850, Spain 8.Northwestern Univ, Ctr Interdisciplinary Explorat & Res Astrophys CIE, Evanston, IL 60208 USA 9.Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA 10.Chinese Acad Sci, Xinjiang Astron Observ, 150 Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China |
| 推荐引用方式 GB/T 7714 | Kishikawa, Ryo,Harada, Nanase,Saito, Toshiki,et al. Components of star formation in NGC 253: Non-negative matrix factorization analysis with the ALCHEMI integrated intensity images[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2024:20. |
| APA | Kishikawa, Ryo.,Harada, Nanase.,Saito, Toshiki.,Aalto, Susanne.,Colzi, Laura.,...&Viti, Serena.(2024).Components of star formation in NGC 253: Non-negative matrix factorization analysis with the ALCHEMI integrated intensity images.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,20. |
| MLA | Kishikawa, Ryo,et al."Components of star formation in NGC 253: Non-negative matrix factorization analysis with the ALCHEMI integrated intensity images".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN (2024):20. |
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