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GOALS-JWST: Hidden ...
GOALS-JWST: Hidden Star Formation and Extended PAH Emission in the Luminous Infrared Galaxy VV 114
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- Evans, Aaron S. (author)
- University of Virginia,National Radio Astronomy Observatory
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- Frayer, D. (author)
- Green Bank Observatory
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- Charmandaris, V. (author)
- Panepistimio Kritis,University of Crete,European University Cyprus,Idryma Technologias kai Erevnas (FORTH),Foundation for Research and Technology Hellas (FORTH)
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- Armus, Lee (author)
- California Institute of Technology (Caltech)
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- Inami, H. (author)
- Hiroshima University
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- Surace, J. A. (author)
- California Institute of Technology (Caltech)
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- Linden, S. T. (author)
- University of Massachusetts
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- Soifer, B. T. (author)
- Spitzer Science Center, United States
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- Diaz-Santos, T. (author)
- Idryma Technologias kai Erevnas (FORTH),Foundation for Research and Technology Hellas (FORTH),European University Cyprus
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- Larson, K. (author)
- Space Telescope Science Institute (STScI)
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- Rich, Jeff (author)
- Carnegie Observatories
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- Song, Y. (author)
- National Radio Astronomy Observatory,University of Virginia
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- Barcos-Munoz, Loreto (author)
- University of Virginia,National Radio Astronomy Observatory
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- Mazzarella, J. (author)
- California Institute of Technology (Caltech)
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- Privon, G. (author)
- National Radio Astronomy Observatory,University of Florida
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- Vivian, U. (author)
- University of California at Irvine (UCI)
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- Medling, Anne M. (author)
- University of Toledo
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- Boker, T. (author)
- European Space Agency (ESA)
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- Aalto, Susanne, 1964 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Iwasawa, K. (author)
- Universitat de Barcelona,University of Barcelona,Institucio Catalana de Recerca i Estudis Avancats (ICREA),Catalan Institution for Research and Advanced Studies (ICREA)
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- Howell, Justin (author)
- California Institute of Technology (Caltech)
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- van der Werf, P. (author)
- Universiteit Leiden (UL),Leiden University (UL)
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- Appleton, P. (author)
- California Institute of Technology (Caltech)
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- Bohn, Thomas (author)
- Hiroshima University
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- Brown, Michael J.I. (author)
- Monash University
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- Hayward, Christopher C. (author)
- Flatiron Institute
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- Hoshioka, Shunshi (author)
- Hiroshima University
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- Kemper, F. (author)
- Institucio Catalana de Recerca i Estudis Avancats (ICREA),Catalan Institution for Research and Advanced Studies (ICREA)
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- Lai, Thomas (author)
- California Institute of Technology (Caltech)
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- Law, David (author)
- Space Telescope Science Institute (STScI)
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- Malkan, M. A. (author)
- University of California
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Marshall, Jason (author)
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- Murphy, E. J. (author)
- National Radio Astronomy Observatory
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- Sanders, D. B. (author)
- University of Hawaii
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- Stierwalt, S. (author)
- Occidental College
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(creator_code:org_t)
- 2022-11-15
- 2022
- English.
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In: Astrophysical Journal Letters. - : American Astronomical Society. - 2041-8213 .- 2041-8205. ; 940:1
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https://research.cha...
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https://doi.org/10.3...
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Abstract
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- James Webb Space Telescope (JWST) Mid-Infrared Instrument (MIRI) images of the luminous infrared (IR) galaxy VV 114 are presented. This redshift ∼0.020 merger has a western component (VV 114W) rich in optical star clusters and an eastern component (VV 114E) hosting a luminous mid-IR nucleus hidden at UV and optical wavelengths by dust lanes. With MIRI, the VV 114E nucleus resolves primarily into bright NE and SW cores separated by 630 pc. This nucleus comprises 45% of the 15 μm light of VV 114, with the NE and SW cores having IR luminosities, L IR(8 − 1000 μm) ∼ 8 ± 0.8 × 1010 L ⊙ and ∼ 5 ± 0.5 × 1010 L ⊙, respectively, and IR densities, ΣIR ≳ 2 ± 0.2 × 1013 L ⊙ kpc−2 and ≳ 7 ± 0.7 × 1012 L ⊙ kpc−2, respectively—in the range of ΣIR for the Orion star-forming core and the nuclei of Arp 220. The NE core, previously speculated to have an active galactic nucleus (AGN), has starburst-like mid-IR colors. In contrast, the VV 114E SW core has AGN-like colors. Approximately 40 star-forming knots with L IR ∼ 0.02-5 × 1010 L ⊙ are identified, 28% of which have no optical counterpart. Finally, diffuse emission accounts for 40%-60% of the mid-IR emission. Mostly notably, filamentary polycyclic aromatic hydrocarbon (PAH) emission stochastically excited by UV and optical photons accounts for half of the 7.7 μm light of VV 114. This study illustrates the ability of JWST to detect obscured compact activity and distributed PAH emission in the most extreme starburst galaxies in the local universe.
Subject headings
- 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)
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
Publication and Content Type
- art (subject category)
- ref (subject category)
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To the university's database
- By the author/editor
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Evans, Aaron S.
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Frayer, D.
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Charmandaris, V.
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Armus, Lee
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Inami, H.
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Surace, J. A.
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show more...
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Linden, S. T.
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Soifer, B. T.
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Diaz-Santos, T.
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Larson, K.
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Rich, Jeff
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Song, Y.
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Barcos-Munoz, Lo ...
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Mazzarella, J.
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Privon, G.
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Vivian, U.
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Medling, Anne M.
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Boker, T.
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Aalto, Susanne, ...
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Iwasawa, K.
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Howell, Justin
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van der Werf, P.
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Appleton, P.
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Bohn, Thomas
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Brown, Michael J ...
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Hayward, Christo ...
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Hoshioka, Shunsh ...
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Kemper, F.
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Lai, Thomas
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Law, David
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Malkan, M. A.
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Marshall, Jason
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Murphy, E. J.
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Sanders, D. B.
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Stierwalt, S.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Atom and Molecul ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Other Physics To ...
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Astrophysical Jo ...
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Chalmers University of Technology