The Astrophysical Journal (Jan 2024)
TEMPLATES: Characterization of a Merger in the Dusty Lensing SPT0418–47 System
- Jared Cathey,
- Anthony H. Gonzalez,
- Sidney Lower,
- Kedar A. Phadke,
- Justin Spilker,
- Manuel Aravena,
- Matthew Bayliss,
- Jack E. Birkin,
- Simon Birrer,
- Scott Chapman,
- Håkon Dahle,
- Christopher C. Hayward,
- Yashar Hezaveh,
- Ryley Hill,
- Taylor A. Hutchison,
- Keunho J. Kim,
- Guillaume Mahler,
- Daniel P. Marrone,
- Desika Narayanan,
- Alexander Navarre,
- Cassie Reuter,
- Jane R. Rigby,
- Keren Sharon,
- Manuel Solimano,
- Nikolaus Sulzenauer,
- Joaquin Vieira,
- David Vizgan
Affiliations
- Jared Cathey
- ORCiD
- Department of Astronomy, University of Florida , 211 Bryant Space Sciences Center, Gainesville, FL 32611, USA ; [email protected]
- Anthony H. Gonzalez
- ORCiD
- Department of Astronomy, University of Florida , 211 Bryant Space Sciences Center, Gainesville, FL 32611, USA ; [email protected]
- Sidney Lower
- ORCiD
- Department of Astronomy, University of Florida , 211 Bryant Space Sciences Center, Gainesville, FL 32611, USA ; [email protected]
- Kedar A. Phadke
- ORCiD
- Department of Astronomy, University of Illinois , 1002 West Green St., Urbana, IL 61801, USA; Center for AstroPhysical Surveys, National Center for Supercomputing Applications , 1205 West Clark Street, Urbana, IL 61801, USA
- Justin Spilker
- ORCiD
- Department of Physics and Astronomy and George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University , 4242 TAMU, College Station, TX 77843-4242, USA
- Manuel Aravena
- ORCiD
- Núcleo de Astronomía, Facultad de Ingeniería y Ciencias, Universidad Diego Portales , Av. Ejercito 441, 8370191, Santiago, Chile
- Matthew Bayliss
- ORCiD
- Department of Physics, University of Cincinnati , Cincinnati, OH 45221, USA
- Jack E. Birkin
- ORCiD
- Department of Physics and Astronomy and George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University , 4242 TAMU, College Station, TX 77843-4242, USA
- Simon Birrer
- ORCiD
- Department of Physics and Astronomy, Stony Brook University , Stony Brook, NY 11794, USA
- Scott Chapman
- ORCiD
- Department of Physics and Atmospheric Science, Dalhousie University , Halifax, NS, B3H 4R2, Canada; NRC Herzberg Astronomy and Astrophysics , 5071 West Saanich Rd., Victoria, BC, V9E 2E7, Canada; Department of Physics and Astronomy, University of British Columbia , Vancouver, BC, V6T 1Z1, Canada; Eureka Scientific Inc , Oakland, CA 94602, USA
- Håkon Dahle
- ORCiD
- Institute of Theoretical Astrophysics, University of Oslo , P.O. Box 1029, Blindern, NO-0315 Oslo, Norway
- Christopher C. Hayward
- ORCiD
- Center for Computational Astrophysics, Flatiron Institute , 162 5th Ave., 10010, New York, NY, USA
- Yashar Hezaveh
- ORCiD
- Center for Computational Astrophysics, Flatiron Institute , 162 5th Ave., 10010, New York, NY, USA; Department of Physics, Université de Montréal , Montréal, QC, H2V 0B3, Canada; Ciela—Montreal Institute for Astrophysical Data Analysis and Machine Learning , Montréal, QC, H2V 0B3, Canada; Mila—Quebec Artificial Intelligence Institute , Montréal, QC, H2V 0B3, Canada
- Ryley Hill
- Department of Physics and Astronomy, University of British Columbia , Vancouver, BC, V6T 1Z1, Canada
- Taylor A. Hutchison
- ORCiD
- Observational Cosmology Lab, Code 665, NASA Goddard Space Flight Center , 8800 Greenbelt Rd., Greenbelt, MD 20771, USA
- Keunho J. Kim
- ORCiD
- Department of Physics, University of Cincinnati , Cincinnati, OH 45221, USA
- Guillaume Mahler
- ORCiD
- Centre for Extragalactic Astronomy, Durham University , South Rd., Durham, DH1 3LE, UK; Institute for Computational Cosmology, Durham University , South Rd., Durham, DH1 3LE, UK
- Daniel P. Marrone
- ORCiD
- Steward Observatory, University of Arizona , 933 North Cherry Ave., Tucson, AZ 85721, USA
- Desika Narayanan
- ORCiD
- Department of Astronomy, University of Florida , Gainesville, FL 32611-2055, USA
- Alexander Navarre
- ORCiD
- Department of Physics, University of Cincinnati , Cincinnati, OH 45221, USA
- Cassie Reuter
- ORCiD
- Department of Astronomy, University of Illinois , 1002 West Green St., Urbana, IL 61801, USA
- Jane R. Rigby
- ORCiD
- Observational Cosmology Lab, Code 665, NASA Goddard Space Flight Center , Greenbelt, MD 20771, USA
- Keren Sharon
- ORCiD
- University of Michigan , Department of Astronomy, 1085 South University Ave., Ann Arbor, MI 48109, USA
- Manuel Solimano
- ORCiD
- Instituto de Estudios Astrofísicos , Facultad de Ingeniería y Ciencias, Universidad Diego Portales, Avenida Ejército Libertador 441, 8370191, Santiago, Chile
- Nikolaus Sulzenauer
- ORCiD
- Max-Planck-Institut für Radioastronomie , Auf dem Hügel 69, 53121 Bonn, Germany
- Joaquin Vieira
- ORCiD
- Department of Astronomy, University of Illinois , 1002 West Green St., Urbana, IL 61801, USA; Center for AstroPhysical Surveys, National Center for Supercomputing Applications , 1205 West Clark Street, Urbana, IL 61801, USA; Department of Physics, University of Illinois , 1110 West Green St., Urbana, IL 61801, USA
- David Vizgan
- ORCiD
- Department of Astronomy, University of Illinois , 1002 West Green St., Urbana, IL 61801, USA
- DOI
- https://doi.org/10.3847/1538-4357/ad33c9
- Journal volume & issue
-
Vol. 967,
no. 1
p. 11
Abstract
We present JWST and Atacama Large Millimeter/submillimeter Array (ALMA) imaging for the lensing system SPT0418−47, which includes a strongly lensed, dusty, star-forming galaxy at redshift z = 4.225 and an associated multiply imaged companion. The JWST NIRCam and MIRI imaging observations presented in this paper were acquired as part of the Early Release Science program Targeting Extremely Magnified Panchromatic Lensed Arcs and Their Extended Star formation (TEMPLATES). This data set provides robust mutiwavelength detections of stellar light in both the main (SPT0418A) and companion (SPT0418B) galaxies, while the ALMA detection of [C ii ] emission confirms that SPT0418B lies at the same redshift as SPT0418A. We infer that the projected physical separation of the two galaxies is 4.42 ± 0.05 kpc. We derive total magnifications of μ = 29 ± 1 and μ = 4.1 ± 0.7 for SPT0418A and SPT0418B, respectively. We use both prospector and cigale to derive stellar masses. We find that SPT0418A has a stellar mass of ${M}_{* }={3.4}_{-0.6}^{+1.1}\times {10}^{10}{M}_{\odot }$ from prospector or M _* = 1.5 ± 0.3 × 10 ^10 M _⊙ from cigale . The stellar mass ratio of SPT0418A and SPT0418B is roughly between 4 and 7 ( ${4.2}_{-1.6}^{+1.9}$ for prospector and 7.5 ± 3.7 for cigale ). We see evidence of extended structure associated with SPT0418A that is suggestive of a tidal feature. These features, along with the close projected proximity, imply that the system is interacting. Interestingly, the star formation rates and stellar masses of both galaxies are consistent with the main sequence of star-forming galaxies at this epoch, indicating that this ongoing interaction has not noticeably elevated the star formation levels.
Keywords
