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Using spectroscopy from JWST\/NIRSpec integral field unit, as part of the\n                    <jats:italic>Aether survey<\/jats:italic>\n                    , Gemini\/GNIRS and GMOS, we characterize the continuum and emission line properties of the two quasars, enabling constraints on their black hole masses (\n                    <jats:italic>M<\/jats:italic>\n                    <jats:sub>BH<\/jats:sub>\n                    \u00a0\u2243\u00a01.5\u00a0\u00d7\u00a010\n                    <jats:sup>9<\/jats:sup>\n                    and 4.0\u00a0\u00d7\u00a010\n                    <jats:sup>8<\/jats:sup>\n                    <jats:italic>M<\/jats:italic>\n                    <jats:sub>\u2299<\/jats:sub>\n                    ), accretion states (\n                    <jats:italic>\u03bb<\/jats:italic>\n                    <jats:sub>Edd<\/jats:sub>\n                    \u00a0\u2243\u00a01.23 and 1.07), and systemic redshifts (\n                    <jats:italic>z<\/jats:italic>\n                    <jats:sub>sys<\/jats:sub>\n                    \u00a0\u2243\u00a06.0781 and 6.0785). We place this pair in the cosmological context by comparing the chance of occurrence to extrapolations of high-\n                    <jats:italic>z<\/jats:italic>\n                    quasar clustering measurements at larger scales, resulting in a \u223c2\u20133 order of magnitude excess with respect to expectations. This excess hints at an underlying population of merger-triggered quasar pairs at cosmic dawn or to a denser-than-average galactic environment.\n                    <jats:italic>N\u0101p\u014dwaw\u0101\u2018enakaulua<\/jats:italic>\n                    thus represents a crucial signpost to investigate the mass assembly of the first massive galaxies and black holes.\n                  <\/jats:p>","DOI":"10.3847\/2041-8213\/aeb11f","type":"journal-article","created":{"date-parts":[[2026,11,10]],"date-time":"2026-11-10T18:57:16Z","timestamp":1794337036000},"page":"L59","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["<i>N\u0101p\u014dwaw\u0101\u2018enakaulua<\/i>\n                    : A Close Quasar Pair at Cosmic Dawn in the Aether Survey"],"prefix":"10.3847","volume":"1011","author":[{"ORCID":"https:\/\/orcid.org\/0009-0009-1715-4157","authenticated-orcid":true,"given":"Silvia","family":"Onorato","sequence":"first","affiliation":[{"name":"International Gemini Observatory"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6822-2254","authenticated-orcid":true,"given":"Emanuele Paolo","family":"Farina","sequence":"additional","affiliation":[{"name":"International Gemini Observatory"},{"name":"INAF\u2014Osservatorio di Astrofisica e Scienza dello Spazio di Bologna"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2662-8803","authenticated-orcid":true,"given":"Roberto","family":"Decarli","sequence":"additional","affiliation":[{"name":"INAF\u2014Osservatorio di Astrofisica e Scienza dello Spazio di Bologna"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-2205-7725","authenticated-orcid":false,"given":"Klaudia","family":"Protu\u0161ov\u00e1","sequence":"additional","affiliation":[{"name":"Heidelberg University"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9712-0038","authenticated-orcid":false,"given":"Elia","family":"Pizzati","sequence":"additional","affiliation":[{"name":"Center for Astrophysics\u2014Harvard & Smithsonian"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3007-0013","authenticated-orcid":true,"given":"Debora","family":"Pelliccia","sequence":"additional","affiliation":[{"name":"Department of Astronomy & Astrophysics"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3765-8001","authenticated-orcid":true,"given":"Devin S.","family":"Chu","sequence":"additional","affiliation":[{"name":"University of Hawai\u2018i - Hilo"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Larry Lindsey","family":"Kimura","sequence":"additional","affiliation":[{"name":"Ka Haka \u2018Ula O Ke\u2018elik\u014dlani\/College of Hawaiian Language (KHUOK)"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Leinani","family":"Lozi","sequence":"additional","affiliation":[{"name":"International Gemini Observatory"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Emily","family":"Peavy","sequence":"additional","affiliation":[{"name":"International Gemini Observatory"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4770-6137","authenticated-orcid":true,"given":"Fabrizio","family":"Arrigoni\u2013Battaia","sequence":"additional","affiliation":[{"name":"Max Planck Institut f\u00fcr Astrophysik"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2931-7824","authenticated-orcid":false,"given":"Eduardo","family":"Ba\u00f1ados","sequence":"additional","affiliation":[{"name":"Max Planck Institut f\u00fcr Astronomie"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3026-0562","authenticated-orcid":true,"given":"Aaron J.","family":"Barth","sequence":"additional","affiliation":[{"name":"University of California"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4747-4484","authenticated-orcid":true,"given":"Silvia","family":"Belladitta","sequence":"additional","affiliation":[{"name":"Max Planck Institut f\u00fcr Astronomie"},{"name":"INAF\u2014Osservatorio di Astrofisica e Scienza dello Spazio di Bologna"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4314-021X","authenticated-orcid":false,"given":"Manuela","family":"Bischetti","sequence":"additional","affiliation":[{"name":"Universit\u00e0 di Pisa"},{"name":"INAF\u2014Osservatorio Astronomico di Trieste"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8582-7012","authenticated-orcid":true,"given":"Sarah E. 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