{"paper":{"title":"VVV Survey of Blue Horizontal-Branch Stars in the Bulge-Halo Transition Region of the Milky Way","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"2, 2), (2) Instituto Milenio de Astrof\\'isica, 3), (3) Vatican Observatory, (4) Universidad de Antofagasta, (5) Pontificia Universidad Cat\\'olica de Chile, (6) Universidade Federal de Santa Catarina, (7) University of Notre Dame, Antofagasta, Brazil, Chile, Dante Minniti (1, David Brown (3) ((1) Universidad Andr\\'es Bello, Europe, Florian\\'opolis, Javier Alonso-Garc\\'ia (4, Katherine Montenegro (1, Maren Hempel (5), Notre Dame, Roberto K. Saito (6), Santiago, Timothy C. Beers (7), USA), Vatican City State","submitted_at":"2018-09-30T04:38:44Z","abstract_excerpt":"We characterize the population of blue horizontal-branch (BHB) stars in the bulge-halo transition region of the Milky Way using the VISTA Variables in the V\\'ia L\\'actea (VVV) ESO Public Survey data. The selection of BHB stars is made using the globular cluster M22 as a reference standard, and constructing color-magnitude and color-color diagrams with specific cuts in the $ZYJHK_s$ near-infrared (IR) passbands. A total of 12,554 BHB stars were detected, in a region within $-10.0^{\\circ} \\leq \\ell \\leq 10.2^{\\circ}$ and $-10.2^{\\circ} \\leq b \\leq -8.0^{\\circ}$. We provide accurate coordinates a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.00316","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"}