The Astrophysical Journal (Jan 2024)
JADES Ultrared Flattened Objects: Morphologies and Spatial Gradients in Color and Stellar Populations
- Justus L. Gibson,
- Erica Nelson,
- Christina C. Williams,
- Sedona H. Price,
- Katherine E. Whitaker,
- Katherine A. Suess,
- Anna de Graaff,
- Benjamin D. Johnson,
- Andrew J. Bunker,
- William M. Baker,
- Rachana Bhatawdekar,
- Kristan Boyett,
- Stephane Charlot,
- Emma Curtis-Lake,
- Daniel J. Eisenstein,
- Kevin Hainline,
- Ryan Hausen,
- Roberto Maiolino,
- George Rieke,
- Marcia Rieke,
- Brant Robertson,
- Sandro Tacchella,
- Chris Willott
Affiliations
- Justus L. Gibson
- ORCiD
- Department for Astrophysical and Planetary Science, University of Colorado , Boulder, CO 80309, USA
- Erica Nelson
- ORCiD
- Department for Astrophysical and Planetary Science, University of Colorado , Boulder, CO 80309, USA
- Christina C. Williams
- ORCiD
- NSF's National Optical-Infrared Astronomy Research Laboratory , 950 North Cherry Avenue, Tucson, AZ 85719, USA
- Sedona H. Price
- ORCiD
- Department of Physics and Astronomy and PITT PACC, University of Pittsburgh , Pittsburgh, PA 15260, USA
- Katherine E. Whitaker
- ORCiD
- Department of Astronomy, University of Massachusetts , Amherst, MA 01003, USA; Cosmic Dawn Center (DAWN) , Denmark
- Katherine A. Suess
- ORCiD
- Kavli Institute for Particle Astrophysics and Cosmology and Department of Physics, Stanford University , Stanford, CA 94305, USA
- Anna de Graaff
- ORCiD
- Max-Planck-Institut für Astronomie , Königstuhl 17, D-69117, Heidelberg, Germany
- Benjamin D. Johnson
- ORCiD
- Center for Astrophysics—Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA
- Andrew J. Bunker
- ORCiD
- Department of Physics, University of Oxford , Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK
- William M. Baker
- ORCiD
- Kavli Institute for Cosmology, University of Cambridge , Madingley Road, Cambridge, CB3 0HA, UK; Cavendish Laboratory, University of Cambridge , 19 JJ Thomson Avenue, Cambridge, CB3 0HE, UK
- Rachana Bhatawdekar
- ORCiD
- European Space Agency (ESA), European Space Astronomy Centre (ESAC) , Camino Bajo del Castillo s/n, 28692 Villanueva de la Cañada, Madrid, Spain
- Kristan Boyett
- ORCiD
- School of Physics, University of Melbourne , Parkville 3010, VIC, Australia; ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) , Australia
- Stephane Charlot
- ORCiD
- Sorbonne Université , CNRS, UMR 7095, Institut d’Astrophysique de Paris, 98 bis bd Arago, 75014 Paris, France
- Emma Curtis-Lake
- ORCiD
- Centre for Astrophysics Research, Department of Physics, Astronomy and Mathematics, University of Hertfordshire , Hatfield AL10 9AB, UK
- Daniel J. Eisenstein
- ORCiD
- Center for Astrophysics—Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA
- Kevin Hainline
- ORCiD
- Steward Observatory, University of Arizona , 933 N. Cherry Avenue, Tucson, AZ 85721, USA
- Ryan Hausen
- ORCiD
- Department of Physics and Astronomy, The Johns Hopkins University , 3400 N. Charles Street, Baltimore, MD 21218, USA
- Roberto Maiolino
- ORCiD
- Kavli Institute for Cosmology, University of Cambridge , Madingley Road, Cambridge, CB3 0HA, UK; Cavendish Laboratory, University of Cambridge , 19 JJ Thomson Avenue, Cambridge, CB3 0HE, UK; Department of Physics and Astronomy, University College London , Gower Street, London WC1E 6BT, UK
- George Rieke
- ORCiD
- Steward Observatory and Department of Planetary Sciences, University of Arizona , 933 N. Cherry Avenue, Tucson, AZ 85721, USA
- Marcia Rieke
- ORCiD
- Steward Observatory, University of Arizona , 933 N. Cherry Avenue, Tucson, AZ 85721, USA
- Brant Robertson
- ORCiD
- Department of Astronomy and Astrophysics University of California , Santa Cruz, 1156 High Street, Santa Cruz, CA 96054, USA
- Sandro Tacchella
- ORCiD
- Kavli Institute for Cosmology, University of Cambridge , Madingley Road, Cambridge, CB3 0HA, UK; Cavendish Laboratory, University of Cambridge , 19 JJ Thomson Avenue, Cambridge, CB3 0HE, UK
- Chris Willott
- ORCiD
- NRC Herzberg , 5071 West Saanich Rd, Victoria, BC V9E 2E7, Canada
- DOI
- https://doi.org/10.3847/1538-4357/ad64c2
- Journal volume & issue
-
Vol. 974,
no. 1
p. 48
Abstract
One of the more surprising findings after the first year of JWST observations is the large number of spatially extended galaxies (ultrared flattened objects, or UFOs) among the optically faint galaxy (OFG) population otherwise thought to be compact. Leveraging the depth and survey area of the JWST Advanced Deep Extragalactic Survey, we extend observations of the OFG population to an additional 112 objects, 56 of which are well-resolved in F444W with effective sizes, R _e > 0.″25, more than tripling previous UFO counts. These galaxies have redshifts around 2 2 mag even at large radii). Morphologically, the majority of our UFO sample tends to have low Sérsic indices ( n ∼ 1) suggesting that these large, massive, OFGs have little contribution from a bulge in F444W. Further, a majority have axis ratios between 0.2 < q < 0.4, which Bayesian modeling suggests that their intrinsic shapes are consistent with being a mixture of inclined disks and prolate objects with little to no contribution from spheroids. While kinematic constraints will be needed to determine the true intrinsic shapes of UFOs, it is clear that an unexpected population of large, disky or prolate objects contributes significantly to the population of OFGs.
Keywords
