{"paper":{"title":"{\\em Gaia}-derived luminosities of {\\em Kepler} A/F stars and the pulsator fraction across the {\\delta} Scuti instability strip","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Daniel Hey, Simon J. Murphy, Timothy R. Bedding, Timothy Van Reeth","submitted_at":"2019-02-28T19:00:02Z","abstract_excerpt":"We study the fraction of stars in and around the {\\delta} Scuti instability strip that are pulsating, using {\\em Gaia} DR2 parallaxes to derive precise luminosities. We classify a sample of over 15,000 {\\em Kepler} A and F stars into {\\delta} Sct and non-{\\delta} Sct stars, paying close attention to variability that could have other origins. We find that 18 per cent of the {\\delta} Sct stars have their dominant frequency above the Kepler long-cadence Nyquist frequency (periods < 1 hr), and 30 per cent have some super-Nyquist variability. We analyse the pulsator fraction as a function of effect"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.00015","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"}