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A set of 20 extremely red galaxies at 2.5<z<3.8 with photometric features of old passive-evolving galaxies without dust, with stellar masses of ~10^{11} M_sun, have colors that could be related to passive-evolving galaxies with mean ages larger than 1 Gyr. This suggests they have been formed, on average, when the Universe was very young (<1 Gyr).\n  AIMS. We provide new estimates for the stellar content of these 20 galaxies, with a deeper analysis for two of them that includes spectroscopy.\n  METHODS. We obtained, with the GRANTECAN-10.4 m, ultraviolet rest-frame spectra of two galaxie"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1702.00380","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-02-01T18:12:21Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"cc73d77a1a07c2db340a80c2daa05e2bf9110b8d702227571d71f77abf2f7dc4","abstract_canon_sha256":"f7348eb826cb7c29f92621346ffded0c09d07a956bb80522290bf0a5ef53103a"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:43:39.385563Z","signature_b64":"LDu+0O+QOCvYaMJGlJm6i7C5VCdzhPQZv8Zobi1LeoSod/eD8UjwoJzb3UAIX5ZGuPwkkj411mFqS698PoynAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"87ab2720f3ddf56bb6bed85bd3e90c64ffb21e9ca9593fc653421fa034a03625","last_reissued_at":"2026-05-18T00:43:39.385059Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:43:39.385059Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Stellar content of extremely red quiescent galaxies at z>2","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"A. Vazdekis, C. M. Gutierrez, M. Lopez-Corredoira, N. Castro-Rodriguez","submitted_at":"2017-02-01T18:12:21Z","abstract_excerpt":"CONTEXT. A set of 20 extremely red galaxies at 2.5<z<3.8 with photometric features of old passive-evolving galaxies without dust, with stellar masses of ~10^{11} M_sun, have colors that could be related to passive-evolving galaxies with mean ages larger than 1 Gyr. This suggests they have been formed, on average, when the Universe was very young (<1 Gyr).\n  AIMS. We provide new estimates for the stellar content of these 20 galaxies, with a deeper analysis for two of them that includes spectroscopy.\n  METHODS. 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