Rethinking Habitability Using Biogenic Precursors: Formaldehyde in Millimeter Molecular Clouds of the Inner Galaxy
文献类型：期刊论文
| 作者 | Baharin, N. B.3; Nazri, A. A.3; Rosli, Z.3,4; Abidin, Z. Z.3; Tajuddin, H. A.1; Esimbek, J.2; Li, D. L.2; Tang, X.2 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2025-07-20 |
| 卷号 | 988期号:1页码:36 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/add691 |
| 产权排序 | 4 |
| 英文摘要 | We present a comprehensive study of formaldehyde (H2CO) absorption and radio recombination line (H110 alpha) emission in 215 molecular clouds from the Bolocam Galactic Plane Survey, observed using the Nanshan 25 m radio telescope. H2CO was detected in 88 sources (40.93%) with 59 being new detections, while H110 alpha emission was found in only 11 sources (5.12%), all coincident with H2CO absorption. There exists a correlation of H2CO fluxes with millimeter fluxes below a 3 Jy threshold and an increased dispersion above it, suggesting the sub-cosmic microwave background cooling of H2CO. Cross-matching with kinematic distance catalogs revealed H2CO spanning galactocentric distances from 0.216 to 10.769 kpc, with column densities ranging from 7.82 x 1011 to 6.69 x 1014 cm-2. A significant inverse correlation was observed between H2CO detection fraction and galactocentric distance, suggesting enhanced star-forming activity closer to the Galactic Center. These findings challenge traditional Galactic Habitable Zone (GHZ) models by demonstrating the presence of biogenic precursors in the inner Galaxy, shielded within dense molecular clouds. Our results underscore the importance of incorporating chemical tracers such as H2CO, alongside physical constraints to refine the boundaries of the GHZ and advance the research of prebiotic chemistry in the Milky Way. |
| WOS关键词 | STAR-FORMING REGIONS ; RADIO RECOMBINATION LINES ; COMPLEX ORGANIC-MOLECULES ; H II REGIONS ; GALACTIC-CENTER ; OUTER GALAXY ; MILKY-WAY ; KINEMATIC DISTANCES ; INTERSTELLAR ICE ; MASSIVE STARS |
| 资助项目 | Operation, Maintenance, and Upgrading Fund for Astronomical Telescopes and Facility Instruments ; Ministry of Finance of China (MOF) - National Key R&D Program of China[2022YFA1603103] ; Ministry of Finance of China (MOF) - National Key R&D Program of China[2023YFA1608002] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001526639200001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | Operation, Maintenance, and Upgrading Fund for Astronomical Telescopes and Facility Instruments ; Ministry of Finance of China (MOF) - National Key R&D Program of China |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/7916]  |
| 专题 | 恒星形成与演化研究团组 |
| 通讯作者 | Baharin, N. B. |
| 作者单位 | 1.Univ Malaya, Fac Sci, Dept Chem, Kuala Lumpur 50603, Malaysia 2.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 3.Univ Malaya, Fac Sci, Dept Phys, Kuala Lumpur 50603, Malaysia 4.Univ Malaya Wales, Ctr Fdn Language & Malaysian Studies, Kuala Lumpur 50480, Malaysia |
| 推荐引用方式 GB/T 7714 | Baharin, N. B.,Nazri, A. A.,Rosli, Z.,et al. Rethinking Habitability Using Biogenic Precursors: Formaldehyde in Millimeter Molecular Clouds of the Inner Galaxy[J]. ASTROPHYSICAL JOURNAL,2025,988(1):36. |
| APA | Baharin, N. B..,Nazri, A. A..,Rosli, Z..,Abidin, Z. Z..,Tajuddin, H. A..,...&Tang, X..(2025).Rethinking Habitability Using Biogenic Precursors: Formaldehyde in Millimeter Molecular Clouds of the Inner Galaxy.ASTROPHYSICAL JOURNAL,988(1),36. |
| MLA | Baharin, N. B.,et al."Rethinking Habitability Using Biogenic Precursors: Formaldehyde in Millimeter Molecular Clouds of the Inner Galaxy".ASTROPHYSICAL JOURNAL 988.1(2025):36. |
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