GOALS-JWST: Unveiling Dusty Compact Sources in the Merging Galaxy IIZw096
Artikel i vetenskaplig tidskrift, 2022
We have used the Mid-InfraRed Instrument (MIRI) on the James Webb Space Telescope (JWST) to obtain the first spatially resolved, mid-infrared images of IIZw096, a merging luminous infrared galaxy (LIRG) at z = 0.036. Previous observations with the Spitzer Space Telescope suggested that the vast majority of the total IR luminosity (L IR) of the system originated from a small region outside of the two merging nuclei. New observations with JWST/MIRI now allow an accurate measurement of the location and luminosity density of the source that is responsible for the bulk of the IR emission. We estimate that 40%-70% of the IR bolometric luminosity, or 3-5 × 1011 L ⊙, arises from a source no larger than 175 pc in radius, suggesting a luminosity density of at least 3-5 × 1012 L ⊙ kpc−2. In addition, we detect 11 other star-forming sources, five of which were previously unknown. The MIRI F1500W/F560W colors of most of these sources, including the source responsible for the bulk of the far-IR emission, are much redder than the nuclei of local LIRGs. These observations reveal the power of JWST to disentangle the complex regions at the hearts of merging, dusty galaxies.
Författare
H. Inami
Hiroshima University
J. A. Surace
California Institute of Technology (Caltech)
Lee Armus
California Institute of Technology (Caltech)
Aaron S. Evans
National Radio Astronomy Observatory
University of Virginia
K. Larson
Space Telescope Science Institute (STScI)
Loreto Barcos-Munoz
National Radio Astronomy Observatory
University of Virginia
S. Stierwalt
Occidental College
J. Mazzarella
California Institute of Technology (Caltech)
G. Privon
National Radio Astronomy Observatory
University of Florida
Y. Song
University of Virginia
National Radio Astronomy Observatory
S. T. Linden
University of Massachusetts
Christopher C. Hayward
Flatiron Institute
T. Boker
Europeiska rymdorganisationen (ESA)
U. Vivian
University of California
Thomas Bohn
Hiroshima University
V. Charmandaris
Panepistimio Kritis
Idryma Technologias kai Erevnas (FORTH)
European University Cyprus
T. Diaz-Santos
Idryma Technologias kai Erevnas (FORTH)
European University Cyprus
Justin Howell
California Institute of Technology (Caltech)
Thomas Lai
California Institute of Technology (Caltech)
Anne M. Medling
ARC Centre of Excellence for All-sky Astrophysics (CAASTRO)
University of Toledo
Jeff Rich
Carnegie Observatories
Susanne Aalto
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
P. Appleton
California Institute of Technology (Caltech)
Michael J.I. Brown
Monash University
Shunshi Hoshioka
Hiroshima University
K. Iwasawa
Institucio Catalana de Recerca i Estudis Avancats
Universitat de Barcelona
F. Kemper
Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
Consejo Superior de Investigaciones Científicas (CSIC)
Institucio Catalana de Recerca i Estudis Avancats
David Law
Space Telescope Science Institute (STScI)
M. A. Malkan
University of California
Jason Marshall
Glendale Community College
E. J. Murphy
National Radio Astronomy Observatory
D. B. Sanders
University of Hawaii
P. van der Werf
Universiteit Leiden
Astrophysical Journal Letters
2041-8205 (ISSN) 2041-8213 (eISSN)
Vol. 940 1 L6Exploring the Hidden Dusty Nuclei of Galaxies (HIDDeN)
Europeiska forskningsrådet (ERC) (789410), 2018-10-01 -- 2023-09-30.
Ämneskategorier (SSIF 2011)
Astronomi, astrofysik och kosmologi
Atom- och molekylfysik och optik
Fusion, plasma och rymdfysik
DOI
10.3847/2041-8213/ac9389