Spatially resolved spectrophotometric SED modeling of NGC 253's central molecular zone: I. Star formation in extragalactic giant molecular clouds
文献类型：期刊论文
| 作者 | Humire, Pedro K.18; Dey, Subhrata19,20; Ronconi, Tommaso5,21,22,23; Sasse, Victor H.4; Cid Fernandes, Roberto4; Martin, Sergio3,26; Donevski, Darko19,21; Malek, Katarzyna19; Fernandez-Ontiveros, Juan A.25; Song, Yiqing3,26 |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2025-07-08 |
| 卷号 | 699页码:A183 |
| 关键词 | stars: formation evolution galaxies: individual: NGC 253 galaxies: starburst galaxies: star formation |
| ISSN号 | 0004-6361 |
| DOI | 10.1051/0004-6361/202553897 |
| 产权排序 | 15 |
| 英文摘要 | Context. Studying the interstellar medium in nearby starbursts is essential for gaining insights into the physical mechanisms driving these extreme objects, which are thought to be analogs of young, primeval, star-forming galaxies. This task is now feasible due to deep spectro-photometric data enabled by rapid advancements in ground- and space-based facilities. To fully leverage this wealth of information, extracting insights from the spectral line properties and the spectral energy distribution (SED) is imperative. Aims. This study aims to produce and analyze the physical properties of the first spatially resolved multiwavelength SED of an extragalactic source that covers six decades in frequency (from near-ultraviolet, NUV, to centimeter, cm, wavelengths) at an angular resolution of 3 '', which corresponds to a linear scale of similar to 51 pc at the distance of NGC 253. We focus on the central molecular zone (CMZ) of this starburst galaxy, which contains giant molecular clouds (GMCs) responsible for half of the galaxy's star formation. Methods. We retrieved archival data from near-UV to centimeter wavelengths, covering six decades of spectral range. We computed the SEDs to fit the observations, using the GalaPy code and confronting the results with the CIGALE code for validation. We also employed the STARLIGHT code to analyze the stellar optical spectra of the GMCs. Results. Our results reveal significant differences between internal and external GMCs in terms of stellar and dust masses, star formation rates (SFRs), and bolometric luminosities, among others, with internal GMCs doubling maximum values of the external ones in most of the cases. We obtained tight relations between monochromatic stellar tracers and star-forming conditions obtained from panchromatic emission. We find that the best SFR tracers are radio continuum bands at 33 GHz, radio recombination lines (RRLs), and the total infrared (IR) luminosity range (L-IR; 8-1000 mu m) as well as the IR emission at 60 mu m. The emission line diagnostics based on the BPT and WHAN diagrams suggest that the nuclear region of NGC 253 exhibits shock signatures, placing it in the composite zone typically associated with hybrids of active galactic nucleus (AGN) hosting and star-forming regions, while the AGN fraction from panchromatic emission is negligible (<= 7.5%). Conclusions. Our findings demonstrate the significant heterogeneity within the CMZ of NGC 253, with central GMCs exhibiting high densities, elevated SFRs, and greater dust masses compared to their external counterparts. We confirm the effectiveness of certain centimeter photometric bands as a reliable method to estimate the global SFR, in accordance with previous studies - this time on GMC scales. |
| WOS关键词 | SPECTRAL ENERGY-DISTRIBUTION ; SKY SURVEY GALAXIES ; RAY IONIZATION RATE ; GHZ FREE-FREE ; SEMIEMPIRICAL ANALYSIS ; ALCHEMI MEASUREMENTS ; STARBURST EVOLUTION ; RECOMBINATION LINES ; INTERSTELLAR-MEDIUM ; RADIATIVE-TRANSFER |
| 资助项目 | EVLA X-band data reduction[2023/14272-4] ; Polish National Science Center[UMO-2023/51/D/ST9/00147] ; Italian Research Center on High Performance Computing Big Data and Quantum Computing (ICSC) - European Union ; National Science Center (NCN) grant SONATA[UMO-2020/39/D/ST9/00720] ; Spanish Ministry of Science and Innovation ; ERDF A way of making Europe[MCIN/AEI/10.13039/501100011033] ; European Union NextGenerationEU/PRTR[PID2021-124918NB-C44] ; European Union NextGenerationEU/PRTR[CNS2023-145339] ; European Union NextGenerationEU/PRTR[ICTS-MRR-2021-03-CEFCA] ; National Science Centre, Poland ; Spanish Ministry of Science, Innovation and Universities/State Agency of Research[UMO-2022/45/N/ST9/01336] ; Spanish Ministry of Science, Innovation and Universities/State Agency of Research[PID2022-136814NB-I00] ; ERDF, UE[MICIU/AEI/10.13039/501100011033] ; ESF, Investing in your future[MICIU/AEI/10.13039/501100011033] ; ESF, Investing in your future[RYC2020-029387-I] ; Consejo Superior de Investigaciones Cientficas (CSIC)[MICIU/AEI/10.13039/501100011033] ; Consejo Superior de Investigaciones Cientficas (CSIC)[20225AT015] ; Consejo Superior de Investigaciones Cientficas (CSIC)[CNS2023-144464] ; Consejo Nacional de Investigaciones Cientficas y Tcnicas (CONICET) ; Agencia I+D+i[PICT 2019-03299] ; Universidad Nacional de La Plata (Argentina) ; International Gemini Observatory[2024/05467-9] ; NSF NOIRLab ; U.S. National Science Foundation ; United States of America[FB210003] ; ALMA[2017.1.00161] ; Karl G. Jansky Very Large Array archival observations[2018.1.00162] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001524245100018 |
| 出版者 | EDP SCIENCES S A |
| 资助机构 | EVLA X-band data reduction ; Polish National Science Center ; Italian Research Center on High Performance Computing Big Data and Quantum Computing (ICSC) - European Union ; National Science Center (NCN) grant SONATA ; Spanish Ministry of Science and Innovation ; ERDF A way of making Europe ; European Union NextGenerationEU/PRTR ; National Science Centre, Poland ; Spanish Ministry of Science, Innovation and Universities/State Agency of Research ; ERDF, UE ; ESF, Investing in your future ; Consejo Superior de Investigaciones Cientficas (CSIC) ; Consejo Nacional de Investigaciones Cientficas y Tcnicas (CONICET) ; Agencia I+D+i ; Universidad Nacional de La Plata (Argentina) ; International Gemini Observatory ; NSF NOIRLab ; U.S. National Science Foundation ; United States of America ; ALMA ; Karl G. Jansky Very Large Array archival observations |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/7922]  |
| 专题 | 研究单元未命名 |
| 通讯作者 | Humire, Pedro K. |
| 作者单位 | 1.Max Planck Inst Radioastron, Auf dem Hugel 69, D-53121 Bonn, Germany 2.Natl Radioastron Observ, 520 Edgemont Rd, Charlottesville, VA 22903 USA 3.European Southern Observ, Alonso Cordova 3107, Santiago 7630355, Vitacura, Chile 4.Univ Fed Santa Catarina, Campus Univ Reitor Joao David Ferreira Lima, BR-88040900 Florianopolis, SC, Brazil 5.Ctr Nazl Ric High Performance Comp Big Data & Quan, Via Magnanelli 2, Bologna, Italy 6.Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan 7.Acad Sinica, Inst Astron & Astrophys, 11F AS NTU Astron Mathe Bldg,1,Sec 4,Roosevelt Rd, Taipei 106216, Taiwan 8.Grad Univ Adv Studies SOKENDAI, Sch Sci, Dept Astron, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan 9.Univ Andres Bello, Inst Astrophys, Fac Ciencias Exactas, Talcahuano, Chile 10.New Mexico Inst Min & Technol, 801 Leroy Pl, Socorro, NM 87801 USA |
| 推荐引用方式 GB/T 7714 | Humire, Pedro K.,Dey, Subhrata,Ronconi, Tommaso,et al. Spatially resolved spectrophotometric SED modeling of NGC 253's central molecular zone: I. Star formation in extragalactic giant molecular clouds[J]. ASTRONOMY & ASTROPHYSICS,2025,699:A183. |
| APA | Humire, Pedro K..,Dey, Subhrata.,Ronconi, Tommaso.,Sasse, Victor H..,Cid Fernandes, Roberto.,...&de Oliveira, Claudia Mendes.(2025).Spatially resolved spectrophotometric SED modeling of NGC 253's central molecular zone: I. Star formation in extragalactic giant molecular clouds.ASTRONOMY & ASTROPHYSICS,699,A183. |
| MLA | Humire, Pedro K.,et al."Spatially resolved spectrophotometric SED modeling of NGC 253's central molecular zone: I. Star formation in extragalactic giant molecular clouds".ASTRONOMY & ASTROPHYSICS 699(2025):A183. |
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来源：新疆天文台
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