{"paper":{"title":"Near-infrared spectroscopy of 5 ultra-massive galaxies at 1.7 < z < 2.7","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Adam Muzzin, Britt Lundgren, Danilo Marchesini, David Wake, Erin Kado-Fong, Gabriel Brammer, Gregory Rudnick, Ivo Labb\\'e, Katherine Whitaker, Mauro Stefanon, Pieter van Dokkum, Rachel Bezanson, Rik Williams, Ryan Quadri, Tomer Tal, Z. Cemile Marsan","submitted_at":"2017-02-14T19:00:00Z","abstract_excerpt":"We present the results of a pilot near-infrared (NIR) spectroscopic campaign of five very massive galaxies ($\\log(\\text{M}_\\star/\\text{M}_\\odot)>11.45$) in the range of $1.7<z<2.7$. We measure an absorption feature redshift for one galaxy at $z_\\text{spec}=2.000\\pm0.006$. For the remaining galaxies, we combine the photometry with the continuum from the spectra to estimate continuum redshifts and stellar population properties. We define a continuum redshift ($z_{\\rm cont}$ ) as one in which the redshift is estimated probabilistically using EAZY from the combination of catalog photometry and the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.04352","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":""},"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"}