{"paper":{"title":"No evolution in the number density of little red dots from cosmic dawn to cosmic noon","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Alessandro Peca, Andrea Comastri, Anita Zanella, Colin Norman, Cristian Vignali, Eros Vanzella, Fabio Vito, Federica Loiacono, Francesco Calura, Gianni Zamorani, Giorgio Lanzuisi, Giovanni Mazzolari, Ignas Juod\\v{z}balis, Isabella Prandoni, Ivan Delvecchio, Kazushi Iwasawa, Marcella Brusa, Marco Chiaberge, Marco Mignoli, Matilde Signorini, Matteo Sapori, Paolo Tozzi, Quirino D'Amato, Roberto Decarli, Roberto Gilli, Roberto Maiolino, Stefano Marchesi","submitted_at":"2026-06-29T13:03:06Z","abstract_excerpt":"We present our search for little red dots (LRDs) in the \"J1030 field\", a region of the sky around the $z\\sim 6.3$ quasar SDSS J1030+0524, observed by the JWST EIGER program. Over 154 point-like sources selected in a JWST-based photometric catalog, we find five broad line emitters (with $FWHM \\gtrsim 1000\\ \\rm km s^{-1}$) that are red ($F200W - F356W > 0$) and are undetected in the X-rays. We use these sources to derive the bolometric luminosity function (LF) of LRDs at $z = 2.4$ and $z = 4.5$. At $z = 2.4$, the space density of LRDs is only a factor of $\\sim 2$ lower than that of all pre-JWST "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.30253","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/2606.30253/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"}