The Astrophysical Journal Letters (Jan 2022)
GOALS-JWST: Unveiling Dusty Compact Sources in the Merging Galaxy IIZw096
- Hanae Inami,
- Jason Surace,
- Lee Armus,
- Aaron S. Evans,
- Kirsten L. Larson,
- Loreto Barcos-Munoz,
- Sabrina Stierwalt,
- Joseph M. Mazzarella,
- George C. Privon,
- Yiqing Song,
- Sean T. Linden,
- Christopher C. Hayward,
- Torsten Böker,
- Vivian U,
- Thomas Bohn,
- Vassilis Charmandaris,
- Tanio Diaz-Santos,
- Justin H. Howell,
- Thomas Lai,
- Anne M. Medling,
- Jeffrey A. Rich,
- Susanne Aalto,
- Philip Appleton,
- Michael J. I. Brown,
- Shunshi Hoshioka,
- Kazushi Iwasawa,
- Francisca Kemper,
- David Law,
- Matthew A. Malkan,
- Jason Marshall,
- Eric J. Murphy,
- David Sanders,
- Paul van der Werf
Affiliations
- Hanae Inami
- ORCiD
- Hiroshima Astrophysical Science Center, Hiroshima University , 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan ; [email protected]
- Jason Surace
- ORCiD
- IPAC, California Institute of Technology , 1200 East California Boulevard, Pasadena, CA 91125, USA
- Lee Armus
- ORCiD
- IPAC, California Institute of Technology , 1200 East California Boulevard, Pasadena, CA 91125, USA
- Aaron S. Evans
- ORCiD
- National Radio Astronomy Observatory , 520 Edgemont Road, Charlottesville, VA 22903, USA; Department of Astronomy, University of Virginia , 530 McCormick Road, Charlottesville, VA 22903, USA
- Kirsten L. Larson
- ORCiD
- AURA for the European Space Agency (ESA), Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD, 21218, USA
- Loreto Barcos-Munoz
- ORCiD
- National Radio Astronomy Observatory , 520 Edgemont Road, Charlottesville, VA 22903, USA; Department of Astronomy, University of Virginia , 530 McCormick Road, Charlottesville, VA 22903, USA
- Sabrina Stierwalt
- ORCiD
- Occidental College , Physics Department, 1600 Campus Road, Los Angeles, CA 90042, USA
- Joseph M. Mazzarella
- ORCiD
- IPAC, California Institute of Technology , 1200 East California Boulevard, Pasadena, CA 91125, USA
- George C. Privon
- ORCiD
- National Radio Astronomy Observatory , 520 Edgemont Road, Charlottesville, VA 22903, USA; Department of Astronomy, University of Florida , P.O. Box 112055, Gainesville, FL 32611, USA
- Yiqing Song
- ORCiD
- National Radio Astronomy Observatory , 520 Edgemont Road, Charlottesville, VA 22903, USA; Department of Astronomy, University of Virginia , 530 McCormick Road, Charlottesville, VA 22903, USA
- Sean T. Linden
- ORCiD
- Department of Astronomy, University of Massachusetts at Amherst , Amherst, MA 01003, USA
- Christopher C. Hayward
- ORCiD
- Center for Computational Astrophysics, Flatiron Institute , 162 Fifth Avenue, New York, NY 10010, USA
- Torsten Böker
- ORCiD
- European Space Agency, Space Telescope Science Institute , Baltimore, Maryland, USA
- Vivian U
- ORCiD
- Department of Physics and Astronomy , 4129 Frederick Reines Hall, University of California, Irvine, CA 92697, USA
- Thomas Bohn
- ORCiD
- Hiroshima Astrophysical Science Center, Hiroshima University , 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan ; [email protected]
- Vassilis Charmandaris
- ORCiD
- Department of Physics, University of Crete , Heraklion, 71003, Greece; Institute of Astrophysics, Foundation for Research and Technology-Hellas (FORTH) , Heraklion, 70013, Greece; School of Sciences, European University Cyprus , Diogenes Street, Engomi, 1516 Nicosia, Cyprus
- Tanio Diaz-Santos
- ORCiD
- Institute of Astrophysics, Foundation for Research and Technology-Hellas (FORTH) , Heraklion, 70013, Greece; School of Sciences, European University Cyprus , Diogenes Street, Engomi, 1516 Nicosia, Cyprus
- Justin H. Howell
- ORCiD
- IPAC, California Institute of Technology , 1200 East California Boulevard, Pasadena, CA 91125, USA
- Thomas Lai
- ORCiD
- IPAC, California Institute of Technology , 1200 East California Boulevard, Pasadena, CA 91125, USA
- Anne M. Medling
- ORCiD
- Department of Physics & Astronomy and Ritter Astrophysical Research Center, University of Toledo , Toledo, OH 43606, USA; ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) , Australia
- Jeffrey A. Rich
- ORCiD
- The Observatories of the Carnegie Institution for Science , 813 Santa Barbara Street, Pasadena, CA 91101, USA
- Susanne Aalto
- ORCiD
- Department of Space, Earth and Environment, Chalmers University of Technology , SE-412 96 Gothenburg, Sweden
- Philip Appleton
- ORCiD
- IPAC, California Institute of Technology , 1200 East California Boulevard, Pasadena, CA 91125, USA
- Michael J. I. Brown
- ORCiD
- School of Physics & Astronomy, Monash University , Clayton, VIC 3800, Australia
- Shunshi Hoshioka
- Hiroshima Astrophysical Science Center, Hiroshima University , 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan ; [email protected]
- Kazushi Iwasawa
- ORCiD
- Institut de Ciències del Cosmos (ICCUB), Universitat de Barcelona (IEEC-UB) , Martí i Franquès, 1, E-08028 Barcelona, Spain; ICREA, Pg. Lluís Companys 23, E-08010 Barcelona, Spain
- Francisca Kemper
- ORCiD
- Institut de Ciencies de l’Espai (ICE, CSIC) , Can Magrans, s/n, E-08193 Bellaterra, Barcelona, Spain; ICREA, Pg. Lluś Companys 23, Barcelona, Spain; Institut d’Estudis Espacials de Catalunya (IEEC) , E-08034 Barcelona, Spain
- David Law
- ORCiD
- Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA
- Matthew A. Malkan
- ORCiD
- Department of Physics & Astronomy , UCLA, Los Angeles, CA 90095-1547, USA
- Jason Marshall
- ORCiD
- Glendale Community College , 1500 N. Verdugo Road, Glendale, CA 91208, USA
- Eric J. Murphy
- ORCiD
- National Radio Astronomy Observatory , 520 Edgemont Road, Charlottesville, VA 22903, USA
- David Sanders
- ORCiD
- Institute for Astronomy, University of Hawaii , 2680 Woodlawn Drive, Honolulu, HI 96822, USA
- Paul van der Werf
- ORCiD
- Leiden Observatory, Leiden University , NL-2300 RA Leiden, The Netherlands
- DOI
- https://doi.org/10.3847/2041-8213/ac9389
- Journal volume & issue
-
Vol. 940,
no. 1
p. L6
Abstract
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 × 10 ^11 L _⊙ , arises from a source no larger than 175 pc in radius, suggesting a luminosity density of at least 3–5 × 10 ^12 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.
Keywords
