{"paper":{"title":"The field high-amplitude SX Phe variable BL Cam: results from a multisite photometric campaign. II. Evidence of a binary - possibly triple - system","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Avdibegovic, A. Nava-Vega, A.-Y. Zhou, B. H. Granslo, B. Yasarsoy, C. Ulusoy, C. Yesilyaprak, E. G. Hintz, E. Rodr\\'iguez, F. Fumagalli, F. J. Aceituno, F. Van Den Abbeel, G. Klingenberg, G. Santacana, H. Ku\\v{c}\\'akov\\'a, H. W\\\"ucher, I. Ribas, I. Scheggia, J. A. Farrell, J. H. Simonetti, J.-J. Rives, J. Kliner, J. Michelet, J.-M. Vugnon, J.-P. Sareyan, K. A. Graham, K. Truparov\\'a, L. Fox-Machado, L. Kotkov\\'a, L. Kr\\'al, M. Alvarez, M. Bla\\u{z}ek, M. Fauvaud, M. Helvaci, M. J. L\\'opez-Gonz\\'alez, M. P. Nicholson, M. Vil\\'a\\v{s}ek, M. Wolf, O. Trondal, P. Lampens, P. Van Cauteren, P. Zasche, R. Behrend, R. Koci\\'an, R. Michel, S. Barto\\v{s}\\'ikov\\'a, S. Fauvaud, V. M. Casanova","submitted_at":"2010-04-16T02:59:24Z","abstract_excerpt":"Short-period high-amplitude pulsating stars of Population I ($\\delta$ Sct stars) and II (SX Phe variables) exist in the lower part of the classical (Cepheid) instability strip. Most of them have very simple pulsational behaviours, only one or two radial modes being excited. Nevertheless, BL Cam is a unique object among them, being an extreme metal-deficient field high-amplitude SX Phe variable with a large number of frequencies. Based on a frequency analysis, a pulsational interpretation was previously given. aims heading (mandatory) We attempt to interpret the long-term behaviour of the resid"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1004.2748","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"}