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JWST Reveals a Possible z similar to 11 Galaxy Merger in Triply Lensed MACS0647-JD

Hsiao, Tiger Yu-Yang (author)
Johns Hopkins Univ, Dept Phys & Astron, Ctr Astrophys Sci, 3400 N Charles St, Baltimore, MD 21218 USA.
Coe, Dan (author)
Johns Hopkins Univ, Dept Phys & Astron, Ctr Astrophys Sci, 3400 N Charles St, Baltimore, MD 21218 USA.;Space Telescope Sci Inst STScI, Baltimore, MD 21218 USA.;European Space Agcy ESA, Assoc Univ Res Astron AURA Inc, Washington, DC USA.
Whitler, Lily (author)
Univ Arizona, Steward Observ, 933 N Cherry Ave, Tucson, AZ 85721 USA.
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Jung, Intae (author)
Space Telescope Sci Inst STScI, Baltimore, MD 21218 USA.
Khullar, Gourav (author)
Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA.;Univ Pittsburgh, PITT PACC, Pittsburgh, PA 15260 USA.
Meena, Ashish Kumar (author)
BenGur Univ Negev, Dept Phys, POB 653, IL-84105 Beer Sheva, Israel.
Dayal, Pratika (author)
Univ Groningen, Kapteyn Astron Inst, POB 800, NL-9700 AV Groningen, Netherlands.
Barrow, Kirk S. S. (author)
Univ Illinois, Dept Astron, 1002 W Green St, Urbana, IL 61801 USA.
Santos-Olmsted, Lillian (author)
Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, 452 Lomita Mall, Stanford, CA 94305 USA.
Casselman, Adam (author)
Univ Illinois, Dept Aerosp Engn, 104 S Wright St, Urbana, IL 61801 USA.
Vanzella, Eros (author)
INAF, Osservatorio Astrofis & Sci Spazio Bologna, Via Gobetti 93-3, I-40129 Bologna, Italy.
Nonino, Mario (author)
INAF, Trieste Astron Observ, Via Bazzoni 2, I-34124 Trieste, Italy.
Jimenez-Teja, Yolanda (author)
Inst Astrofis Andalucia, Glorieta Astron S-N, E-18008 Granada, Spain.;Observ Nacl MCTI ON, Rua Gal Jose Cristino 77, BR-20921400 Rio De Janeiro, Brazil.
Oguri, Masamune (author)
Chiba Univ, Ctr Frontier Sci, 1-33 Yayoi Cho,Inage Ku, Chiba 2638522, Japan.;Chiba Univ, Grad Sch Sci, Dept Phys, 1-33 Yayoi Cho,Inage Ku, Chiba 2638522, Japan.
Stark, Daniel P. (author)
Univ Arizona, Steward Observ, 933 N Cherry Ave, Tucson, AZ 85721 USA.
Furtak, Lukas J. (author)
BenGur Univ Negev, Dept Phys, POB 653, IL-84105 Beer Sheva, Israel.
Zitrin, Adi (author)
BenGur Univ Negev, Dept Phys, POB 653, IL-84105 Beer Sheva, Israel.
Adamo, Angela (author)
Stockholm Univ, AlbaNova Univ Ctr, Dept Astron, Oskar Klein Ctr, SE-10691 Stockholm, Sweden.
Brammer, Gabriel (author)
Cosm Dawn Ctr DAWN, Copenhagen, Denmark.;Univ Copenhagen, Niels Bohr Inst, Jagtvej 128, Copenhagen, Denmark.
Bradley, Larry (author)
Space Telescope Sci Inst STScI, Baltimore, MD 21218 USA.
Diego, Jose M. (author)
CSIC UC, Inst Fis Cantabria, Ave Castros S-N, E-39005 Santander, Spain.
Zackrisson, Erik (author)
Uppsala universitet,Observationell astrofysik
Finkelstein, Steven L. (author)
Univ Texas Austin, Dept Astron, Austin, TX 78712 USA.
Windhorst, Rogier A. (author)
Arizona State Univ, Sch Earth & Space Explorat, Tempe, AZ 85287 USA.
Bhatawdekar, Rachana (author)
European Space Agcy, ESTEC, Keplerlaan 1, NL-2201 AZ Noordwijk, Netherlands.
Hutchison, Taylor A. (author)
NASA Goddard Space Flight Ctr, Observ Cosmol Lab, Greenbelt, MD 20771 USA.
Broadhurst, Tom (author)
Univ Basque Country UPV EHU, Dept Theoret Phys, Bilbao, Spain.;Donostia Int Phys Ctr DIPC, E-20018 Donostia San Sebastian, Spain.;IKERBASQUE, Basque Fdn Sci, Bilbao, Spain.
Dimauro, Paola (author)
INAF, Osservatorio Astron Roma, Via Frascati 33, I-00078 Monte Porzio Catone, Italy.
Andrade-Santos, Felipe (author)
Berklee Coll Mus, Dept Liberal Arts & Sci, 7 Haviland St, Boston, MA 02215 USA.;Harvard & Smithsonian, Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.
Eldridge, Jan J. (author)
Univ Auckland, Dept Phys, Private Bag 92019, Auckland, New Zealand.
Acebron, Ana (author)
Univ Milan, Dipartimento Fis, Via Celoria 16, I-20133 Milan, Italy.;INAF, IASF Milano, Via A Corti 12, I-20133 Milan, Italy.
Avila, Roberto J. (author)
Space Telescope Sci Inst STScI, Baltimore, MD 21218 USA.
Bayliss, Matthew B. (author)
Univ Cincinnati, Dept Phys, Cincinnati, OH 45221 USA.
Benitez, Alex (author)
Univ London, Kings Coll London, London WC2R 2LS, England.
Binggeli, Christian, 1989- (author)
Uppsala universitet,Observationell astrofysik
Bolan, Patricia (author)
Univ Calif Davis, Dept Phys & Astron, 1 Shields Ave, Davis, CA 95616 USA.
Bradac, Marusa (author)
Univ Calif Davis, Dept Phys & Astron, 1 Shields Ave, Davis, CA 95616 USA.;Univ Ljubljana, Dept Math & Phys, Jadranska Ulica 19, SI-1000 Ljubljana, Slovenia.
Carnall, Adam C. (author)
Univ Edinburgh, Inst Astron, Royal Observ, Edinburgh EH9 3HJ, Scotland.
Conselice, Christopher J. (author)
Univ Manchester, Jodrell Bank Ctr Astrophys, Oxford Rd, Manchester M13 9PL, England.
Donahue, Megan (author)
Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA.
Frye, Brenda (author)
Univ Arizona, Dept Astron, Steward Observ, 933 North Cherry Ave, Tucson, AZ 85721 USA.
Fujimoto, Seiji (author)
Cosm Dawn Ctr DAWN, Copenhagen, Denmark.;Univ Copenhagen, Niels Bohr Inst, Jagtvej 128, Copenhagen, Denmark.;Univ Texas Austin, Dept Astron, Austin, TX 78712 USA.
Henry, Alaina (author)
Johns Hopkins Univ, Dept Phys & Astron, Ctr Astrophys Sci, 3400 N Charles St, Baltimore, MD 21218 USA.;Space Telescope Sci Inst STScI, Baltimore, MD 21218 USA.
James, Bethan L. (author)
Space Telescope Sci Inst STScI, Baltimore, MD 21218 USA.
Kassin, Susan A. (author)
Johns Hopkins Univ, Dept Phys & Astron, Ctr Astrophys Sci, 3400 N Charles St, Baltimore, MD 21218 USA.;Space Telescope Sci Inst STScI, Baltimore, MD 21218 USA.
Kewley, Lisa (author)
Harvard & Smithsonian, Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA.
Larson, Rebecca L. (author)
Univ Texas Austin, Dept Astron, Austin, TX 78712 USA.
Lauer, Tod (author)
NSFs Natl Opt Infrared Astron Res Lab, 950 North Cherry Ave, Tucson, AZ 85719 USA.
Law, David (author)
Space Telescope Sci Inst STScI, Baltimore, MD 21218 USA.
Mahler, Guillaume (author)
Univ Durham, Inst Computat Cosmol, South Rd, Durham DH1 3LE, England.;Univ Durham, Ctr Extragalact Astron, Durham DH1 3LE, England.
Mainali, Ramesh (author)
NASA Goddard Space Flight Ctr, Observ Cosmol Lab, Greenbelt, MD 20771 USA.
McCandliss, Stephan (author)
Johns Hopkins Univ, Dept Phys & Astron, Ctr Astrophys Sci, 3400 N Charles St, Baltimore, MD 21218 USA.
Nicholls, David (author)
Australian Natl Univ, Res Sch Astron & Astrophys, Canberra, ACT 2611, Australia.;Astrophys 3 Dimens ASTRO 3D, ARC Ctr Excellence All Sky, Stromlo, Australia.
Pirzkal, Norbert (author)
Space Telescope Sci Inst STScI, Baltimore, MD 21218 USA.
Postman, Marc (author)
Space Telescope Sci Inst STScI, Baltimore, MD 21218 USA.
Rigby, Jane R. (author)
NASA Goddard Space Flight Ctr, Observ Cosmol Lab, Greenbelt, MD 20771 USA.
Ryan, Russell (author)
Space Telescope Sci Inst STScI, Baltimore, MD 21218 USA.
Senchyna, Peter (author)
Carnegie Observ, 813 Santa Barbara St, Pasadena, CA 91101 USA.
Sharon, Keren (author)
Univ Michigan, Dept Astron, 1085 S Univ Ave, Ann Arbor, MI 48109 USA.
Shimizu, Ikko (author)
Shikoku Gakuin Univ, Dept Literature, 3-2-1 Bunkyocho, Zentsuji, Kagawa 7658505, Japan.
Strait, Victoria (author)
Cosm Dawn Ctr DAWN, Copenhagen, Denmark.;Univ Copenhagen, Niels Bohr Inst, Jagtvej 128, Copenhagen, Denmark.
Tang, Mengtao (author)
UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England.
Trenti, Michele (author)
Univ Melbourne, Sch Phys, Parkville, Vic 3010, Australia.;Univ Melbourne, Astrophys 3 Dimens, ARC Ctr Excellence All Sky, Parkville, Vic 3010, Australia.
Vikaeus, Anton (author)
Uppsala universitet,Observationell astrofysik
Welch, Brian (author)
NASA Goddard Space Flight Ctr, Observ Cosmol Lab, Greenbelt, MD 20771 USA.;Univ Maryland, Dept Astron, College Pk, MD 20742 USA.;NASA, GSFC, Ctr Res & Explorat Space Sci & Technol, Greenbelt, MD 20771 USA.
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Johns Hopkins Univ, Dept Phys & Astron, Ctr Astrophys Sci, 3400 N Charles St, Baltimore, MD 21218 USA Johns Hopkins Univ, Dept Phys & Astron, Ctr Astrophys Sci, 3400 N Charles St, Baltimore, MD 21218 USA.;Space Telescope Sci Inst STScI, Baltimore, MD 21218 USA.;European Space Agcy ESA, Assoc Univ Res Astron AURA Inc, Washington, DC USA. (creator_code:org_t)
American Astronomical Society, 2023
2023
English.
In: Astrophysical Journal Letters. - : American Astronomical Society. - 2041-8205 .- 2041-8213. ; 949:2
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • MACS0647-JD is a triply lensed z similar to 11 galaxy originally discovered with the Hubble Space Telescope. The three lensed images are magnified by factors of similar to 8, 5, and 2 to AB mag 25.1, 25.6, and 26.6 at 3.5 mu m. The brightest is over a magnitude brighter than other galaxies recently discovered at similar redshifts z > 10 with JWST. Here, we report new JWST imaging that clearly resolves MACS0647-JD as having two components that are either merging galaxies or stellar complexes within a single galaxy. The brighter larger component "A" is intrinsically very blue (ss similar to-2.6 +/- 0.1), likely due to very recent star formation and no dust, and is spatially extended with an effective radius similar to 70 +/- 24 pc. The smaller component "B" (r similar to 20-+ 58 pc) appears redder (ss similar to-2 +/- 0.2), likely because it is older (100-200 Myr) with mild dust extinction (AV similar to 0.1 mag). With an estimated stellar mass ratio of roughly 2:1 and physical projected separation similar to 400 pc, we may be witnessing a galaxy merger 430 million years after the Big Bang. We identify galaxies with similar colors in a high-redshift simulation, finding their star formation histories to be dissimilar, which is also suggested by the spectral energy distribution fitting, suggesting they formed further apart. We also identify a candidate companion galaxy "C" similar to 3 kpc away, likely destined to merge with A and B. Upcoming JWST Near Infrared Spectrograph observations planned for 2023 January will deliver spectroscopic redshifts and more physical properties for these tiny magnified distant galaxies observed in the early universe.

Subject headings

NATURVETENSKAP  -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)

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