Year: 2026
Type: preprint
Abstract: James Webb Space Telescope surveys reveal many rapidly assembled galaxies in the first billion years. Simulations struggle to reproduce their rapid star formation and abrupt cessation, known as quenching. Testing these models is difficult because high-redshift galaxies are compact and appear unresolved. We present VENUS-CLJ0152-QG1, a massive post-starburst galaxy at redshift 5.18. A foreground cluster lenses it into three images, yielding a physical resolution of about 70 parsecs, enough to probe quenching processes on sub-kiloparsec scales. We find a half-light radius twice as large as expected, a central stellar mass density three times lower than field analogs, and off-center ionized gas emission. These features suggest it quenched without compaction or an obvious active galactic nucleus, a departure from unlensed high-redshift galaxies that lensing makes visible.
Source: arXiv (Cornell University)
Authors: Pan, Richard, Marchesini, Danilo, Allingham, Joseph F. V., Fujimoto, Seiji, Zitrin, Adi, Coe, Dan, Kokorev, Vasily, Furtak, Lukas J., Antwi-Danso, Jacqueline, Asada, Yoshihisa, Bauer, Franz E., Bradač, Maruša, Bradley, Larry D., Cheng, Chloe M., Dayal, Pratika, Faisst, Andreas L., Frye, Brenda L., Grogin, Norman A., Hsiao, Tiger Yu-Yang, Khullar, Gourav, Koekemoer, Anton M., Larison, Conor, Lucas, Ray A., Markov, Vladan, Martis, Nicholas S., Nakane, Minami, Noirot, Gaël, Richard, Johan, Ricotti, Massimo, Robbins, Luke, Sun, Fengwu, Valentino, Francesco, Vanzella, Eros, Willott, Chris, Windhorst, Rogier A., Yanagisawa, Hiroto, Zanella, Anita
Institutions: Tufts University, Ben-Gurion University of the Negev, University of Toronto, The University of Texas at Austin, University of Tarapacá, University of Ljubljana, University of California, Davis, Space Telescope Science Institute, California Institute of Technology, Infrared Processing and Analysis Center, University of Arizona, University of Washington, Institute for Cosmic Ray Research, The University of Tokyo, Lyon 1 Université, École Normale Supérieure de Lyon, Centre de Recherche Astrophysique de Lyon, University of Maryland, College Park, Center for Astrophysics Harvard & Smithsonian, DTU Space, Technical University of Denmark, Osservatorio di Astrofisica e Scienza dello Spazio, National Institute for Astrophysics, Herzberg Institute of Astrophysics, Centre National de la Recherche Scientifique, Arizona State University
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: National Aeronautics and Space Administration, Canadian Foundation for AIDS Research, Canarie, Space Telescope Science Institute, European Commission, University of Toronto, Agencia Nacional de Investigación y Desarrollo, Alliance de recherche numérique du Canada, Goddard Space Flight Center, Canadian Space Agency, Natural Sciences and Engineering Research Council of Canada, Japan Society for the Promotion of Science
Awards: G103270039, G1055883707, G256731684, G2724668986, G6608474652, G6722835988, G6909262500, G7297228001, THE PROPOSAL SEEKS TO ACCOMPLISH SEVERAL INVESTIGATIONS TO SIMULATE THE PERFORMANCE OF JWST DEEP FIELD SURVEYS, VARYING AS-YET-POORLY CHARACTERIZED P, 極金属欠乏銀河のヘリウム組成比で探る宇宙のレプトン非対称性, SPECTRO-TEMPORAL STUDIES OF AGN POPULATIONS, IN 2002 WE WERE GRANTED 110 HOURS GTO TIME FOR A JWST MEDIUM-DEEP SURVEY. WITH HST AND SPITZER EXPERIENCE 14 YEARS LATER WE REDEFINE THIS SURVEY TO IMAGE~18 NIRCAM FIELDS IN 7 FILTERS TO AB<~ 29 29.3 MAG YIELDING 140 000 GALAXIES AT 0<~ Z<~ 12 15 IN 0.05 DEG2 (>~ 30 HUDFS!). WE WILL STUDY GALAXY ASSEMBLY + SUPER-MASSIVE BLACK-HOLE GROWTH AT Z 0 7 INCLUDING OBJECT VARIABILITY ON MONTHS YEARS TIMESCALES. WE STUDY THE REIONIZING POPULATION AT Z 2 8 AND USE THE BEST LENSING TARGETS TO OPTIMIZE OUR STUDY OF FIRST LIGHT OBJECTS AT Z 10 15. OUR SCIENCE GOALS ARE: 1. GALAXY ASSEMBLY; 2. SUPER-MASSIVE BLACK-HOLE GROWTH; 3. REIONIZATION; 4. FIRST LIGHT; 5. STUDY THE BEST LENSING CLUSTERS TO FIND JWST OBJECTS. MAP&REMOVE STRAYLIGHT GRADIENTS AND QUANTIFY SAMPLE COMPLETENESS IN RANDOM FIELD&CLUSTER IMAGES: WE WILL: A) USE HUDF AND HFF DATA TO SIMULATE MAP AND REMOVE A RANGE OF STRAYLIGHT AMPLITUDES AND GRADIENTS THAT COULD AFFECT RANDOM DEEP FIELDS (DFS) AND CLUSTER FIELDS WITH JWST; B) DETERMINE ACCURATE COMPLETENESS CORRECTIONS VS. GALAXY FLUX SIZE WAVELENGTH AND LOCATION IN JWST DFS OF VARIOUS DEPTH AND IN CLUSTER FIELDS WITH THEIR KNOWN GALAXY CLUSTER+ICL FOREGROUND; C) DETERMINE THE CLUSTER SELECTION FUNCTIONS BY FOLDING LENSING MAPS WITH SIMULATED BACKGROUND IMAGES YIELDING SIMULATED LENSED IMAGES AND THEIR COMPLETENESS CORRECTIONS FOR LENSED SOURCES WHICH WE SHOW CAN BE FACTORS 2 3; AND D) MODEL COSMIC VARIANCE IN HIERARCHICAL MODELS AT Z 6 15. WE WILL CORRECT THE LFS FOR THESE COMPLETENESS FUNCTIONS. WE WILL THEN USE A BAYESIAN CODE TO DETERMINE THE OPTIMAL SET OF LF EVOLUTION PARAMETERS FROM THE AVAILABLE JWST DATA TO QUANTIFY HOW GALAXIES ASSEMBLED SINCE Z<~ 15., G8477266931, G8684856318, CENTRO DE ASTROFISICA Y TECNOLOGIAS AFINES (CATA), G972786147
OpenAlex ID: W7214226435