PDRs4All: III. JWST's NIR spectroscopic view of the Orion Bar

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Peeters, ElsWestern University (author)

PDRs4All: III. JWST's NIR spectroscopic view of the Orion Bar

Article/chapterEnglish2024

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2024
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LIBRIS-ID:oai:research.chalmers.se:14adddc8-8be4-4a39-b5fe-32cc06b9708c
https://doi.org/10.1051/0004-6361/202348244DOI
https://research.chalmers.se/publication/541267URI

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Language:English
Summary in:English

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SwePubSwePub

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Subject category:art swepub-publicationtype
Subject category:ref swepub-contenttype

Notes

Context. JWST has taken the sharpest and most sensitive infrared (IR) spectral imaging observations ever of the Orion Bar photodis-sociation region (PDR), which is part of the nearest massive star-forming region the Orion Nebula, and often considered to be the 'prototypical'strongly illuminated PDR. Aims. We investigate the impact of radiative feedback from massive stars on their natal cloud and focus on the transition from the H II region to the atomic PDR -crossing the ionisation front (IF) -, and the subsequent transition to the molecular PDR -crossing the dissociation front (DF). Given the prevalence of PDRs in the interstellar medium and their dominant contribution to IR radiation, understanding the response of the PDR gas to far-ultraviolet (FUV) photons and the associated physical and chemical processes is fundamental to our understanding of star and planet formation and for the interpretation of any unresolved PDR as seen by JWST. Methods. We used high-resolution near-IR integral field spectroscopic data from NIRSpec on JWST to observe the Orion Bar PDR as part of the PDRs4All JWST Early Release Science programme. We constructed a 3″ × 25″ spatio-spectral mosaic covering 0.97-5.27 μm at a spectral resolution R of ~2700 and an angular resolution of 0.075″-0.173″. To study the properties of key regions captured in this mosaic, we extracted five template spectra in apertures centred on the three H2 dissociation fronts, the atomic PDR, and the H II region. This wealth of detailed spatial-spectral information was analysed in terms of variations in the physical conditions-incident UV field, density, and temperature -of the PDR gas. Results. The NIRSpec data reveal a forest of lines including, but not limited to, He I, H I, and C I recombination lines; ionic lines (e.g. Fe III and Fe II); O I and N I fluorescence lines; aromatic infrared bands (AIBs, including aromatic CH, aliphatic CH, and their CD counterparts); pure rotational and ro-vibrational lines from H2; and ro-vibrational lines from HD, CO, and CH+, with most of them having been detected for the first time towards a PDR. Their spatial distribution resolves the H and He ionisation structure in the Huygens region, gives insight into the geometry of the Bar, and confirms the large-scale stratification of PDRs. In addition, we observed numerous smaller-scale structures whose typical size decreases with distance from θ1 Ori C and IR lines from C I, if solely arising from radiative recombination and cascade, reveal very high gas temperatures (a few 1000 K) consistent with the hot irradiated surface of small-scale dense clumps inside the PDR. The morphology of the Bar, in particular that of the H2 lines, reveals multiple prominent filaments that exhibit different characteristics. This leaves the impression of a 'terraced'transition from the predominantly atomic surface region to the CO-rich molecular zone deeper in. We attribute the different characteristics of the H2 filaments to their varying depth into the PDR and, in some cases, not reaching the C+/C/CO transition. These observations thus reveal what local conditions are required to drive the physical and chemical processes needed to explain the different characteristics of the DFs and the photochemical evolution of the AIB carriers. Conclusions. This study showcases the discovery space created by JWST to further our understanding of the impact radiation from young stars has on their natal molecular cloud and proto-planetary disk, which touches on star and planet formation as well as galaxy evolution.

Subject headings and genre

NATURVETENSKAP Fysik Astronomi, astrofysik och kosmologi hsv//swe
NATURAL SCIENCES Physical Sciences Astronomy, Astrophysics and Cosmology hsv//eng
NATURVETENSKAP Fysik Atom- och molekylfysik och optik hsv//swe
NATURAL SCIENCES Physical Sciences Atom and Molecular Physics and Optics hsv//eng
Infrared: ISM
ISM: individual objects: Orion Bar
Techniques: spectroscopic
HII regions
Photon-dominated region (PDR)

Added entries (persons, corporate bodies, meetings, titles ...)

Habart, EmilieInstitut d'Astrophysique Spatiale (author)
Berné, O.Institut de Recherche en Astrophysique et Planétologie (IRAP) (author)
Sidhu, AmeekWestern University (author)
Chown, RyanWestern University (author)
Van De Putte, DriesSpace Telescope Science Institute (STScI) (author)
Trahin, BorisInstitut d'Astrophysique Spatiale (author)
Schroetter, IlaneInstitut de Recherche en Astrophysique et Planétologie (IRAP) (author)
Canin, AmelieInstitut de Recherche en Astrophysique et Planétologie (IRAP) (author)
Alarcon, FelipeUniversity of Michigan (author)
Schefter, BethanyWestern University (author)
Khan, BariaWestern University (author)
Pasquini, SofiaWestern University (author)
Tielens, A.G.G.M.Universiteit Leiden (UL),Leiden University (UL),University of Maryland (author)
Wolfire, M.G.University of Maryland (author)
Dartois, E.Université Paris-Saclay,University Paris-Saclay (author)
Goicoechea, J.R.CSIC - Instituto de Fisica Fundamental (IFF) (author)
Maragkoudakis, AlexandrosNASA Ames Research Center (author)
Onaka, TakashiUniversity of Tokyo, Japan,Meisei University (author)
Pound, Marc W.University of Maryland (author)
Vicente, S.Instituto de Astrofísica e Ciências do Espaço (IA),Institute of Astrophysics and Space Sciences (IA) (author)
Abergel, AlainInstitut d'Astrophysique Spatiale (author)
Bergin, E. A.University of Michigan (author)
Bernard-Salas, J.CERGA (Centre d'Etudes et de Recherche de Grasse ACRI) (author)
Boersma, ChristiaanNASA Ames Research Center (author)
Bron, E.Observatoire de Paris,Paris Observatory (author)
Cami, JanWestern University (author)
Cuadrado, S.CSIC - Instituto de Fisica Fundamental (IFF) (author)
Dicken, D.Royal Observatory (author)
Elyajouri, MeriemInstitut d'Astrophysique Spatiale (author)
Fuente, A.Observatorio Astronómico Nacional (OAN),Spanish National Observatory (OAN) (author)
Gordon, K.Space Telescope Science Institute (STScI),Universiteit Gent,Ghent university (author)
Issa, LinaInstitut de Recherche en Astrophysique et Planétologie (IRAP) (author)
Joblin, C.Institut de Recherche en Astrophysique et Planétologie (IRAP) (author)
Kannavou, OlgaInstitut d'Astrophysique Spatiale (author)
Lacinbala, Ozan (author)
Languignon, DavidObservatoire de Paris,Paris Observatory (author)
Gal, R. LeInstitut de Radioastronomie Millimétrique (IRAM) (author)
Meshaka, RaphaelLERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France,Institut d'Astrophysique Spatiale (author)
Okada, YokoUniversität zu Köln,University of Cologne (author)
Robberto, MassimoJohns Hopkins University,Space Telescope Science Institute (STScI) (author)
Rollig, M.Johann Wolfgang Goethe Universität Frankfurt am Main,Goethe University Frankfurt (author)
Schirmer, Thiébaut-Antoine,1992Chalmers tekniska högskola,Chalmers University of Technology,Institut d'Astrophysique Spatiale(Swepub:cth)thisch (author)
Tabone, BenoîtInstitut d'Astrophysique Spatiale (author)
Zannese, MarionInstitut d'Astrophysique Spatiale (author)
Aleman, I.Universidade Federal de Itajuba,Federal University of Itajubá,Universidade de Sao Paulo (USP),University of Sao Paulo (USP) (author)
Allamandola, LouisBay Area Environmental Research Institute (BAER),NASA Ames Research Center (author)
Auchettl, RebeccaAustralian Synchrotron (ANSTO) (author)
Baratta, Giuseppe AntonioIstituto nazionale di astrofisica (INAF) (author)
Bejaoui, SalmaNASA Ames Research Center (author)
Bera, Partha P.NASA Ames Research Center,Bay Area Environmental Research Institute (BAER) (author)
Black, John H,1949Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)jblack (author)
Boulanger, F. (author)
Bouwman, JordyUniversity of Colorado at Boulder (author)
Brandl, B. R.Universiteit Leiden (UL),Leiden University (UL) (author)
Brechignac, PhilippeUniversité Paris-Saclay,University Paris-Saclay (author)
Brünken, S.Radboud Universiteit,Radboud University (author)
Buragohain, MridusmitaUniversity of Hyderabad (author)
Burkhardt, Andrew (author)
Candian, AlessandraAnton Pannekoek Institute for Astronomy (author)
Cazaux, S.Technische Universiteit Delft,Delft University of Technology (TU Delft) (author)
Cernicharo, JoseCSIC - Instituto de Fisica Fundamental (IFF) (author)
Chabot, MarinUniversité Paris-Saclay,University Paris-Saclay (author)
Chakraborty, ShubhadipUniversité de Rennes 1,University of Rennes 1 (author)
Champion, JasonInstitut de Recherche en Astrophysique et Planétologie (IRAP) (author)
Colgan, Sean W. J.NASA Ames Research Center (author)
Cooke, Ilsa R.University of British Columbia (UBC) (author)
Coutens, A.Institut de Recherche en Astrophysique et Planétologie (IRAP) (author)
Cox, N. L. J.ACRI-ST,Observatoire de la Cote d'Azur (author)
Demyk, K.Institut de Recherche en Astrophysique et Planétologie (IRAP) (author)
Meyer, Jennifer DonovanNational Radio Astronomy Observatory (author)
Foschino, SachaInstitut de Recherche en Astrophysique et Planétologie (IRAP) (author)
Garcia-Lario, P.European Space Astronomy Centre (ESAC) (author)
Gerin, M.Observatoire de Paris,Paris Observatory (author)
Gottlieb, C. A.Harvard-Smithsonian Center for Astrophysics (author)
Guillard, P.Institut Universitaire de France,Institut d 'Astrophysique de Paris (author)
Gusdorf, AntoineLERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres, France (author)
Hartigan, PatrickRice University (author)
He, J. H.Universidad de Chile (UCH),University of Chile (UCH),Chinese Academy of Sciences,Yunnan Observatories (author)
Herbst, EUniversity of Virginia (author)
Hornekaer, LivÅrhus Universitet,Aarhus University (author)
Jäger, CorneliaFriedrich-Schiller-Universität Jena,Friedrich Schiller University Jena (author)
Janot-Pacheco, EduardoUniversidade de Sao Paulo (USP),University of Sao Paulo (USP) (author)
Kaufman, M.San Jose State University (author)
Kendrew, S.European Space Agency (ESA) (author)
Kirsanova, M. S.Russian Academy of Sciences (author)
Klaassen, PamelaRoyal Observatory (author)
Kwok, SunUniversity of British Columbia (UBC) (author)
Labiano, A.European Space Astronomy Centre (ESAC) (author)
Lai, ThomasCalifornia Institute of Technology (Caltech) (author)
Lee, Timothy J.NASA Ames Research Center (author)
Lefloch, B.Université de Bordeaux,University of Bordeaux (author)
Le Petit, Franck,1975Observatoire de Paris,Paris Observatory (author)
Li, AigenUniversity of Missouri (author)
Linz, H.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
MacKie, Cameron J.University of California at Berkeley,Lawrence Berkeley National Laboratory (author)
Madden, S. C.Université Paris-Saclay,University Paris-Saclay (author)
Mascetti, Joëlle (author)
McGuire, BrettNational Radio Astronomy Observatory,Massachusetts Institute of Technology (MIT) (author)
Merino, PabloCSIC - Instituto de Ciencia de Materiales de Madrid (ICMM) (author)
Micelotta, Elisabetta R.Helsingin Yliopisto,University of Helsinki (author)
Misselt, K. A.University of Arizona (author)
Morse, Jon A. (author)
Mulas, GiacomoIstituto nazionale di astrofisica (INAF),Institut de Recherche en Astrophysique et Planétologie (IRAP) (author)
Neelamkodan, Naslim (author)
Ohsawa, RyouNational Astronomical Observatory of Japan (author)
Paladini, R.California Institute of Technology (Caltech) (author)
Palumbo, Maria ElisabettaIstituto nazionale di astrofisica (INAF) (author)
Pathak, AmitBanaras Hindu University (author)
Pendleton, Yvonne J.University of Central Florida (UCF) (author)
Petrignani, AnnemiekeUniversiteit Van Amsterdam,University of Amsterdam (author)
Pino, ThomasUniversité Paris-Saclay,University Paris-Saclay (author)
Puga, E.European Space Agency (ESA) (author)
Rangwala, NaseemNASA Ames Research Center (author)
Rapacioli, Mathias (author)
Ricca, AlessandraSETI Institute (author)
Roman-Duval, J.Space Telescope Science Institute (STScI) (author)
Roser, JosephSETI Institute,NASA Ames Research Center (author)
Roueff, EvelyneObservatoire de Paris,Paris Observatory (author)
Rouillé, GaëlFriedrich-Schiller-Universität Jena,Friedrich Schiller University Jena (author)
Salama, FaridNASA Ames Research Center (author)
Sales, Dinalva A. (author)
Sandstrom, KarinUniversity of California (author)
Sarre, PeterUniversity Of Nottingham (author)
Sciamma-O'Brien, EllaNASA Ames Research Center (author)
Sellgren, KrisOhio State University (author)
Shenoy, Sachindev S.Space Science Institute (author)
Teyssier, D.European Space Astronomy Centre (ESAC) (author)
Thomas, Richard D.Stockholms universitet,Stockholm University (author)
Togi, AdityaTexas State University (author)
Verstraete, LaurentInstitut d'Astrophysique Spatiale (author)
Witt, Adolf N.University of Toledo (author)
Wootten, A.National Radio Astronomy Observatory (author)
Ysard, NathalieInstitut d'Astrophysique Spatiale (author)
Zettergren, H.Stockholms universitet,Stockholm University (author)
Zhang, YongSun Yat-Sen University (author)
Zhang, Ziwei E.RIKEN (author)
Zhen, Junfeng (author)
Western UniversityInstitut d'Astrophysique Spatiale (creator_code:org_t)

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By the author/editor: Peeters, Els; Habart, Emilie; Berné, O.; Sidhu, Ameek; Chown, Ryan; Van De Putte, Dr ...; show more...; Trahin, Boris; Schroetter, Ilan ...; Canin, Amelie; Alarcon, Felipe; Schefter, Bethan ...; Khan, Baria; Pasquini, Sofia; Tielens, A.G.G.M ...; Wolfire, M.G.; Dartois, E.; Goicoechea, J.R.; Maragkoudakis, A ...; Onaka, Takashi; Pound, Marc W.; Vicente, S.; Abergel, Alain; Bergin, E. A.; Bernard-Salas, J ...; Boersma, Christi ...; Bron, E.; Cami, Jan; Cuadrado, S.; Dicken, D.; Elyajouri, Merie ...; Fuente, A.; Gordon, K.; Issa, Lina; Joblin, C.; Kannavou, Olga; Lacinbala, Ozan; Languignon, Davi ...; Gal, R. Le; Meshaka, Raphael; Okada, Yoko; Robberto, Massim ...; Rollig, M.; Schirmer, Thiéba ...; Tabone, Benoît; Zannese, Marion; Aleman, I.; Allamandola, Lou ...; Auchettl, Rebecc ...; Baratta, Giusepp ...; Bejaoui, Salma; Bera, Partha P.; Black, John H, 1 ...; Boulanger, F.; Bouwman, Jordy; Brandl, B. R.; Brechignac, Phil ...; Brünken, S.; Buragohain, Mrid ...; Burkhardt, Andre ...; Candian, Alessan ...; Cazaux, S.; Cernicharo, Jose; Chabot, Marin; Chakraborty, Shu ...; Champion, Jason; Colgan, Sean W. ...; Cooke, Ilsa R.; Coutens, A.; Cox, N. L. J.; Demyk, K.; Meyer, Jennifer ...; Foschino, Sacha; Garcia-Lario, P.; Gerin, M.; Gottlieb, C. A.; Guillard, P.; Gusdorf, Antoine; Hartigan, Patric ...; He, J. H.; Herbst, E; Hornekaer, Liv; Jäger, Cornelia; Janot-Pacheco, E ...; Kaufman, M.; Kendrew, S.; Kirsanova, M. S.; Klaassen, Pamela; Kwok, Sun; Labiano, A.; Lai, Thomas; Lee, Timothy J.; Lefloch, B.; Le Petit, Franck ...; Li, Aigen; Linz, H.; MacKie, Cameron ...; Madden, S. C.; Mascetti, Joëlle; McGuire, Brett; Merino, Pablo; Micelotta, Elisa ...; Misselt, K. A.; Morse, Jon A.; Mulas, Giacomo; Neelamkodan, Nas ...; Ohsawa, Ryou; Paladini, R.; Palumbo, Maria E ...; Pathak, Amit; Pendleton, Yvonn ...; Petrignani, Anne ...; Pino, Thomas; Puga, E.; Rangwala, Naseem; Rapacioli, Mathi ...; Ricca, Alessandr ...; Roman-Duval, J.; Roser, Joseph; Roueff, Evelyne; Rouillé, Gaël; Salama, Farid; Sales, Dinalva A ...; Sandstrom, Karin; Sarre, Peter; Sciamma-O'Brien, ...; Sellgren, Kris; Shenoy, Sachinde ...; Teyssier, D.; Thomas, Richard ...; Togi, Aditya; Verstraete, Laur ...; Witt, Adolf N.; Wootten, A.; Ysard, Nathalie; Zettergren, H.; Zhang, Yong; Zhang, Ziwei E.; Zhen, Junfeng; show less...

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