{"paper":{"title":"Two Ultra-Faint Milky Way Stellar Systems Discovered in Early Data from the DECam Local Volume Exploration Survey","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. B. Pace, A. Drlica-Wagner, A. H. Riley, A. K. Hughes, A. K. Vivas, A. Monachesi, A. Palmese, A. Pieres, A. R. Walker, A. Zenteno, B. Mutlu-Pakdil, B. Yanny, C. E. Mart\\'inez-V\\'azquez, C. Gallart, D. Crnojevi\\'c, D. Erkal, D. Hernandez-Lang, D. J. James, D. J. Sand, D. L. Nidever, D. L. Tucker, E. F. Bell, E. H. Neilsen, E. J. Tollerud, E. Morganson, E. O. Nadler, F. Paz-Chinchon, G. S. Stringfellow, J. D. Simon, J. Esteves, J. L. Carlin, J. Sanchez, K. A. G. Olsen, K. Bechtol, K. Kuehn, K. Tavangar, L. C. Johnson, L. Santana-Silva, M. Adam\\'ow, M. McNanna, M. Soares-Santos, N. E. D. No\\\"el, N. Kuropatkin, N. Shipp, P. Balaji, P. Jethwa, P. Massana, P. S. Ferguson, R. A. Gruendl, R. H. Wechsler (DELVE Collaboration), R. P. van der Marel, S. Allam, S. Majewski, S. Mau, T. S. Li, W. A. Barkhouse, W. Cerny, Y. Choi, Y.-Y. Mao","submitted_at":"2019-12-06T19:01:05Z","abstract_excerpt":"We report the discovery of two ultra-faint stellar systems found in early data from the DECam Local Volume Exploration survey (DELVE). The first system, Centaurus I (DELVE J1238-4054), is identified as a resolved overdensity of old and metal-poor stars with a heliocentric distance of ${\\rm D}_{\\odot} = 116.3_{-0.6}^{+0.6}$ kpc, a half-light radius of $r_h = 2.3_{-0.3}^{+0.4}$ arcmin, an age of $\\tau > 12.85$ Gyr, a metallicity of $Z = 0.0002_{-0.0002}^{+0.0001}$, and an absolute magnitude of $M_V = -5.55_{-0.11}^{+0.11}$ mag. This characterization is consistent with the population of ultra-fai"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1912.03301","kind":"arxiv","version":3},"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/1912.03301/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"}