{"paper":{"title":"Euclid: A UV-faint quasar in a highly luminous star-forming host galaxy at $z \\approx 7.7$","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"A. Balestra, A. Biviano, A.-C. Eilers, A. Cimatti, A. Costille, A. Da Silva, A. Grazian, A. Hornstrup, A. Kiessling, A. M. C. Le Brun, A. Mora, A. N. Taylor, A. Renzi, A. Secroun, B. Altieri, B. Gillis, B. Joachimi, B. Kubik, B. Rusholme, B. Sartoris, C. Baccigalupi, C. Carbone, C. Colodro-Conde, C. Giocoli, C. J. Conselice, C. J. Willott, C. M. Gutierrez, C. Neissner, C. Padilla, C. Sirignano, D. J. Mortlock, D. L. Clements, D. Maino, D. Sapone, D. Scott, D. Stern, D. Yang, E. Ba\\~nados, E. Franceschi, E. Maiorano, E. Medinaceli, E. Merlin, E. Romelli, E. Sihvola, E. Zucca, F. Courbin, F. Dubath, F. Faustini, F. Finelli, F. Grupp, F. Guarneri, F. Hormuth, F. Marulli, F. M. Zerbi, F. Pasian, F. Raison, F. Shankar, F. Torradeflot, F. Walter, F. Wang, G. Castignani, G. Congedo, G. De Lucia, G. Mainetti, G. Meylan, G. Polenta, G. Riccio, G. Seidel, G. Sirri, G. Vietri, G. Zamorani, H. Degaudenzi, H. Dole, H. Hoekstra, H. J. A. Rottgering, H. Kurki-Suonio, H. M. Courtois, H.-W. Rix, I. Lloro, I. M. Hook, I. Tereno, I. Tutusaus, J. Carretero, J. F. Hennawi, J. Garc\\'ia-Bellido, J.-G. Cuby, J. Gracia-Carpio, J. Mart\\'in-Fleitas, J. Rhodes, J.-T. Schindler, J. Valiviita, J. Weller, J. Wolf, J. Yang, K. C. Chambers, K. George, K. I. Caputi, K. Jahnke, K. Pedersen, L. A. Popa, L. Conversi, L. Guzzo, L. Moscardini, L. Pozzetti, L. Spinoglio, L. Stanco, L. Valenziano, M. Baldi, M. Brescia, M. Castellano, M. Douspis, M. Farina, M. Frailis, M. Fumana, M. Jhabvala, M. K\\\"ummel, M. Kunz, M. Martinelli, M. Melchior, M. Meneghetti, M. Moresco, M. Onoue, M. Poncet, M. Roncarelli, M. Schirmer, M. Viel, N. Auricchio, N. Martinet, N. Tessore, O. Mansutti, O. Marggraf, P. Battaglia, P. B. Lilje, P. Fosalba, P. Monaco, P. Schneider, P. Simon, P. Tallada-Cresp\\'i, R. A. A. Bowler, R. C. Nichol, R. Decarli, R. Farinelli, R. J. Massey, R. Laureijs, R. Saglia, R. Toledo-Moreo, S. Andreon, S. Bardelli, S. Belladitta, S. Bisogni, S. Camera, S. Casas, S. Cavuoti, S. Dusini, S. E. I. Bosman, S. Escoffier, S. Ferriol, S. Fotopoulou, S. Galeotta, S. Kermiche, S. Ligori, S. Marcin, S. Mei, S.-M. Niemi, S. Paltani, S. Pires, S. Toft, S. V. H. Haugan, T. Schrabback, T. Vassallo, V. Capobianco, V. Lindholm, V. Pettorino, V. Scottez, W. Holmes, W. J. Percival, X. Dupac, X. Fan, Y. Copin, Y. Fu, Y. Matsuoka, Y. Wang, Z. Sakr","submitted_at":"2026-07-03T15:44:52Z","abstract_excerpt":"Constraining the co-evolution of supermassive black holes and their host galaxies in the first billion years after the Big Bang is essential for understanding the formation of the earliest cosmic structures. Here, we present IRAM/NOrthern Extended Millimeter Array (NOEMA) observations of the $z \\approx 7.7$ quasar EUCL\\,J125308.55+705432.3, recently discovered in the first data release of the Euclid Wide Survey. We report the most distant detections of [CII] 158$\\mu\\mathrm{m}$ and cold dust emission in a quasar host to date. The [CII] emission line sets the systemic redshift at $z=7.6980\\pm0.0"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.03430","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2607.03430/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}