PDRs4All II. JWST's NIR and MIR imaging view of the Orion Nebula.
文献类型：期刊论文
| 作者 | Habart, Emilie99; Peeters, Els96,97,98; Berné, Olivier95; Trahin, Boris99; Canin, Amélie95; Chown, Ryan97,98; Sidhu, Ameek97,98; Putte, Dries Van De94; Alarcón, Felipe93; Schroetter, Ilane95 |
| 刊名 | ASTRONOMY & ASTROPHYSICS
 |
| 出版日期 | 2024-05-14 |
| 卷号 | 685 |
| 关键词 | infrared: ISM photon-dominated region (PDR) ISM: clouds |
| ISSN号 | 0004-6361 |
| DOI | 10.1051/0004-6361/202346747 |
| 产权排序 | 第57完成单位 |
| 文献子类 | Article |
| 英文摘要 | Context. The James Webb Space Telescope (JWST) has captured the most detailed and sharpest infrared (IR) images ever taken of the inner region of the Orion Nebula, the nearest massive star formation region, and a prototypical highly irradiated dense photodissociation region (PDR). Aims. We investigate the fundamental interaction of far-ultraviolet (FUV) photons with molecular clouds. The transitions across the ionization front (IF), dissociation front (DF), and the molecular cloud are studied at high-angular resolution. These transitions are relevant to understanding the effects of radiative feedback from massive stars and the dominant physical and chemical processes that lead to the IR emission that JWST will detect in many Galactic and extragalactic environments. Methods. We utilized NIRCam and MIRI to obtain sub-arcsecond images over similar to 150'' and 42'' in key gas phase lines (e.g., P alpha a, Br alpha, [FeII] 1.64 mu m, H-2 1-0 S(1) 2.12 mu m, 0-0 S(9) 4.69 mu m), aromatic and aliphatic infrared bands (aromatic infrared bands at 3.3-3.4 mu m, 7.7, and 11.3 mu m), dust emission, and scattered light. Their emission are powerful tracers of the IF and DF, FUV radiation field and density distribution. Using NIRSpec observations the fractional contributions of lines, AIBs, and continuum emission to our NIRCam images were estimated. A very good agreement is found for the distribution and intensity of lines and AIBs between the NIRCam and NIRSpec observations. Results. Due to the proximity of the Orion Nebula and the unprecedented angular resolution of JWST, these data reveal that the molecular cloud borders are hyper structured at small angular scales of similar to 0.1-1'' (similar to 0.0002-0.002 pc or similar to 40-400 au at 414 pc). A diverse set of features are observed such as ridges, waves, globules and photoevaporated protoplanetary disks. At the PDR atomic to molecular transition, several bright features are detected that are associated with the highly irradiated surroundings of the dense molecular condensations and embedded young star. Toward the Orion Bar PDR, a highly sculpted interface is detected with sharp edges and density increases near the IF and DF. This was predicted by previous modeling studies, but the fronts were unresolved in most tracers. The spatial distribution of the AIBs reveals that the PDR edge is steep and is followed by an extensive warm atomic layer up to the DF with multiple ridges. A complex, structured, and folded H-0/H-2 DF surface was traced by the H-2 lines. This dataset was used to revisit the commonly adopted 2D PDR structure of the Orion Bar as our observations show that a 3D terraced geometry is required to explain the JWST observations. JWST provides us with a complete view of the PDR, all the way from the PDR edge to the substructured dense region, and this allowed us to determine, in detail, where the emission of the atomic and molecular lines, aromatic bands, and dust originate. Conclusions. This study offers an unprecedented dataset to benchmark and transform PDR physico-chemical and dynamical models for the JWST era. A fundamental step forward in our understanding of the interaction of FUV photons with molecular clouds and the role of FUV irradiation along the star formation sequence is provided. |
| 学科主题 | 天文学 |
| URL标识 | 查看原文 |
| 出版地 | 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE |
| WOS关键词 | NEUTRAL ATOMIC PHASES ; PHOTODISSOCIATION REGIONS ; PHYSICAL CONDITIONS ; LINE EMISSION ; SUBMILLIMETER OBSERVATIONS ; INTERSTELLAR-MEDIUM ; REFLECTION NEBULAE ; MOLECULAR-HYDROGEN ; VELOCITY FEATURES ; IONIZATION FRONTS |
| 资助项目 | University of Western Ontario; Institute for Earth and Space Exploration; Canadian Space Agency; Natural Sciences and Engineering Research Council of Canada; CNES APR program; Programme National Physique et Chimie du Milieu Interstellaire (PCMI) of CNRS/INSU; INC/INP; CEA; CNES; Spanish MCINN[PID2019-106110GB-I00]; Dutch Science Agency; NASA Ames Research Center through the San Jose State University Research Foundation[80NSSC22M0107]; Deutsche Forschungsgemeinschaft (DFG)[184018867]; JSPS Bilateral Program[120219939]; Department of Science and Technology -SERB via Core Research Grant (DST-CRG)[SERB-CRG/2021/000907]; Institutes of Eminence (IoE) incentive grant; BHU[incentive/2021-22/32439]; Banaras Hindu University, Varanasi; Association of Universities for Research in Astronomy, Inc., under NASA[NAS 5-03127]; NASA Space Telescope Science Institute[1288]; DST; CAS; Swedish Research Council[202003437] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001271220100001 |
| 出版者 | EDP SCIENCES S A |
| 资助机构 | University of Western Ontario ; Institute for Earth and Space Exploration ; Canadian Space Agency ; Natural Sciences and Engineering Research Council of Canada ; CNES APR program ; Programme National Physique et Chimie du Milieu Interstellaire (PCMI) of CNRS/INSU ; INC/INP ; CEA ; CNES ; Spanish MCINN[PID2019-106110GB-I00] ; Dutch Science Agency ; NASA Ames Research Center through the San Jose State University Research Foundation[80NSSC22M0107] ; Deutsche Forschungsgemeinschaft (DFG)[184018867] ; JSPS Bilateral Program[120219939] ; Department of Science and Technology -SERB via Core Research Grant (DST-CRG)[SERB-CRG/2021/000907] ; Institutes of Eminence (IoE) incentive grant ; BHU[incentive/2021-22/32439] ; Banaras Hindu University, Varanasi ; Association of Universities for Research in Astronomy, Inc., under NASA[NAS 5-03127] ; NASA Space Telescope Science Institute[1288] ; DST ; CAS ; Swedish Research Council[202003437] |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/27642]  |
| 专题 | 云南天文台_其他 |
| 作者单位 | 1.Institute of Deep Space Sciences, Deep Space Exploration Laboratory, Hefei 230026, PR China 2.Star and Planet Formation Laboratory, RIKEN Cluster for Pioneering Research, Hirosawa 2-1, Wako, Saitama 351-0198, Japan; 3.School of Physics and Astronomy, Sun Yat-sen University, 2 Da Xue Road, Tangjia, Zhuhai 519000, Guangdong Province, PR China; 4.Ritter Astrophysical Research Center, University of Toledo, Toledo, OH 43606, USA; 5.Department of Physics, Texas State University, San Marcos, TX 78666, USA; 6.Department of Physics, Stockholm University, 10691 Stockholm, Sweden; 7.Space Science Institute, 4765 Walnut St., R203, Boulder, CO 80301, USA; 8.Astronomy Department, Ohio State University, Columbus, OH 43210 USA; 9.School of Chemistry, The University of Nottingham, University Park, Nottingham NG7 2RD, UK; 10.Center for Astrophysics and Space Sciences, Department of Physics, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA; |
| 推荐引用方式 GB/T 7714 | Habart, Emilie,Peeters, Els,Berné, Olivier,et al. PDRs4All II. JWST's NIR and MIR imaging view of the Orion Nebula.[J]. ASTRONOMY & ASTROPHYSICS,2024,685. |
| APA | Habart, Emilie.,Peeters, Els.,Berné, Olivier.,Trahin, Boris.,Canin, Amélie.,...&Zhen, Junfeng.(2024).PDRs4All II. JWST's NIR and MIR imaging view of the Orion Nebula..ASTRONOMY & ASTROPHYSICS,685. |
| MLA | Habart, Emilie,et al."PDRs4All II. JWST's NIR and MIR imaging view of the Orion Nebula.".ASTRONOMY & ASTROPHYSICS 685(2024). |
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来源：云南天文台
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