ALCHEMI, an ALMA Comprehensive High-resolution Extragalactic Molecular Inventory Survey presentation and first results from the ACA array
文献类型：期刊论文
| 作者 | Martin, S.27,28; Mangum, J. G.26; Harada, N.23,24,25; Costagliola, F.22; Sakamoto, K.24; Muller, S.22; Aladro, R.21; Tanaka, K.20; Yoshimura, Y.19; Nakanishi, K.23,25 |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2021-12-03 |
| 卷号 | 656页码:62 |
| ISSN号 | 0004-6361 |
| 关键词 | line identification galaxies ISM galaxies individual NGC 253 galaxies starburst ISM molecules submillimeter ISM |
| DOI | 10.1051/0004-6361/202141567 |
| 通讯作者 | Martin, S.(smartin@eso.org) |
| 英文摘要 | Context. The interstellar medium is the locus of physical processes affecting the evolution of galaxies which drive or are the result of star formation activity, supermassive black hole growth, and feedback. The resulting physical conditions determine the observable chemical abundances that can be explored through molecular emission observations at millimeter and submillimeter wavelengths. Aims. Our goal is to unveiling the molecular richness of the central region of the prototypical nearby starburst galaxy NGC 253 at an unprecedented combination of sensitivity, spatial resolution, and frequency coverage. Methods. We used the Atacama Large Millimeter/submillimeter Array (ALMA), covering a nearly contiguous 289 GHz frequency range between 84.2 and 373.2 GHz, to image the continuum and spectral line emission at 1.6 ''(similar to 28 pc) resolution down to a sensitivity of 30 - 50 mK. This article describes the ALMA Comprehensive High-resolution Extragalactic Molecular Inventory (ALCHEMI) large program. We focus on the analysis of the spectra extracted from the 15 '' (similar to 255 pc) resolution ALMA Compact Array data. Results. We modeled the molecular emission assuming local thermodynamic equilibrium with 78 species being detected. Additionally, multiple hydrogen and helium recombination lines are identified. Spectral lines contribute 5 to 36% of the total emission in frequency bins of 50 GHz. We report the first extragalactic detections of C2H5OH, HOCN, HC3HO, and several rare isotopologues. Isotopic ratios of carbon, oxygen, sulfur, nitrogen, and silicon were measured with multiple species. Concluison. Infrared pumped vibrationaly excited HCN, HNC, and HC3N emission, originating in massive star formation locations, is clearly detected at low resolution, while we do not detect it for HCO+. We suggest high temperature conditions in these regions driving a seemingly "carbon-rich" chemistry which may also explain the observed high abundance of organic species close to those in Galactic hot cores. The L-vib/L-IR ratio was used as a proxy to estimate a 3% contribution from the proto super star cluster to the global infrared emission. Measured isotopic ratios with high dipole moment species agree with those within the central kiloparsec of the Galaxy, while those derived from C-13/O-18 are a factor of five larger, confirming the existence of multiple interstellar medium components within NGC 253 with different degrees of nucleosynthesis enrichment. The ALCHEMI data set provides a unique template for studies of star-forming galaxies in the early Universe. |
| WOS关键词 | GALAXY NGC 253 ; COMPLEX ORGANIC-MOLECULES ; SPECTRAL-LINE SURVEY ; SUPER STAR-CLUSTERS ; NEARBY GALAXIES ; DENSE GAS ; GALACTIC-CENTER ; CARBON-MONOXIDE ; INTERSTELLAR-MEDIUM ; X-RAY |
| 资助项目 | JSPS KAKENHI[JP21K03634] ; JSPS KAKENHI[JP17H06130] ; MOST[108-2112-M-001-015] ; MOST[109-2112-M-001-020] ; Spanish State Research Agency (AEI)[ESP2017-86582-C4-1-R] ; Comunidad de Madrid through the Atraccion de Talento Investigador Senior Grant (COOL: Cosmic Origins Of Life)[2019-T1/TIC-15379] ; State Agency for Research of the Spanish MCIU[AYA2017-84390-C2-1-R] ; FEDER ; Center of Excellence Severo Ochoa award[SEV-2017-0709] ; INAF PRIN-SKA 2017 program[1.05.01.88.04] ; NAOJ ALMA Scientific Research[2017-06B] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | EDP SCIENCES S A |
| WOS记录号 | WOS:000725877600015 |
| 资助机构 | JSPS KAKENHI ; MOST ; Spanish State Research Agency (AEI) ; Comunidad de Madrid through the Atraccion de Talento Investigador Senior Grant (COOL: Cosmic Origins Of Life) ; State Agency for Research of the Spanish MCIU ; FEDER ; Center of Excellence Severo Ochoa award ; INAF PRIN-SKA 2017 program ; NAOJ ALMA Scientific Research |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/4398]  |
| 专题 | 研究单元未命名 |
| 通讯作者 | Martin, S. |
| 作者单位 | 1.Nihon Univ, Coll Engn, Dept Phys, Gen Studies, Koriyama, Fukushima 9638642, Japan 2.Nagoya Univ, Inst Space Earth Environm Res, Chikusa Ku, Furo Cho, Nagoya, Aichi 4648601, Japan 3.Natl Radio Astron Observ, POB O,1003 Lopezville Rd, Socorro, NM 87801 USA 4.New Mexico Inst Min & Technol, 801 Leroy Pl, Socorro, NM 87801 USA 5.Univ Tokyo, Res Ctr Early Universe, Grad Sch Sci, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan 6.Leiden Univ, Leiden Observ, Pob 9513, NL-2300 RA Leiden, Netherlands 7.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 8.King Abdulaziz Univ, Fac Sci, Astron Dept, POB 80203, Jeddah 21589, Saudi Arabia 9.UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England 10.Tech Univ Denmark, DTU Space, Cosm Dawn Ctr, Elektrovej 327, DK-2800 Lyngby, Denmark |
| 推荐引用方式 GB/T 7714 | Martin, S.,Mangum, J. G.,Harada, N.,et al. ALCHEMI, an ALMA Comprehensive High-resolution Extragalactic Molecular Inventory Survey presentation and first results from the ACA array[J]. ASTRONOMY & ASTROPHYSICS,2021,656:62. |
| APA | Martin, S..,Mangum, J. G..,Harada, N..,Costagliola, F..,Sakamoto, K..,...&Yan, Y. T..(2021).ALCHEMI, an ALMA Comprehensive High-resolution Extragalactic Molecular Inventory Survey presentation and first results from the ACA array.ASTRONOMY & ASTROPHYSICS,656,62. |
| MLA | Martin, S.,et al."ALCHEMI, an ALMA Comprehensive High-resolution Extragalactic Molecular Inventory Survey presentation and first results from the ACA array".ASTRONOMY & ASTROPHYSICS 656(2021):62. |
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