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JWST MIRI/MRS observations of hot molecular gas in an AGN host galaxy at Cosmic Noon

  • D. Kakkad
  • , V. Mainieri
  • , Takumi S. Tanaka
  • , John D. Silverman
  • , D. Law
  • , Rogemar A. Riffel
  • , C. Circosta
  • , E. Bertola
  • , M. Bianchin
  • , M. Bischetti
  • , G. Calistro Rivera
  • , S. Carniani
  • , C. Cicone
  • , G. Cresci
  • , T. Costa
  • , C. M. Harrison
  • , I. Lamperti
  • , B. Kalita
  • , Anton M. Koekemoer
  • , A. Marconi
  • M. Perna, E. Piconcelli, A. Puglisi, Gabriele S. Ilha, G. Tozzi, G. Vietri, C. Vignali, S. Ward, G. Zamorani, L. Zappacosta

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Abstract

Active Galactic Nuclei (AGN) are believed to play a central role in quenching star formation by removing or destroying molecular gas from host galaxies via radiation-pressure driven outflows and/or radio jets. Some studies of cold molecular gas in galaxies at Cosmic Noon ($z\sim2$) show that AGN have less cold gas ($$10 kpc in MIRI/MRS and ALMA data, respectively and ancillary NIRCam imaging that reveals two satellite galaxies at distances of $\sim$0.4 arcsec (3.3 kpc) and $\sim$0.9 arcsec (7.4 kpc) from the AGN. Our results tentatively indicate that while the CO(3-2)-based cold gas phase dominates the molecular gas mass at Cosmic Noon, H$_{2}$ ro-vibrational transitions are effective in tracing hot molecular gas locally in regions that may lack CO emission.
Original languageEnglish
Number of pages15
JournalMonthly Notices of the Royal Astronomical Society (MNRAS)
Volume541
Issue number4
Early online date11 Jul 2025
DOIs
Publication statusPublished - 31 Aug 2025

Keywords

  • astro-ph.GA
  • astro-ph.HE

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