{"paper":{"title":"Asteroseismology of the Double-Mode High-Amplitude $\\delta$ Scuti Star VX Hydrae","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Castro, Altamirano-D\\'evora L, C. Ayala-Loera, Hong-Liang Yan, Hui-Fang Xue, Jian-Ning Fu, Jian-rong Shi, Jia-Shu Niu, Jie Su, Jun-Bo Zhang, L. Fox-Machado, R. Michel, Wei-Kai Zong, Yu-Tao Zhou","submitted_at":"2018-07-01T16:26:48Z","abstract_excerpt":"Bi-site time-series photometric and high-resolution spectroscopic observations were made for the double-mode high-amplitude $\\delta$ Scuti star VX\\ Hya. The fundamental frequency $f_{0}=4.4763\\ \\rm{c\\ days^{-1}}$, the first overtone $f_{1}=5.7897\\ \\rm{c\\ days^{-1}}$ and 23 harmonics and linear combinations of $f_{0}$ and $f_{1}$ are detected by pulsation analysis. From the spectroscopic data, we get $\\rm{[Fe/H] = -0.2\\pm0.1\\ dex}$. The period change rate of the fundamental mode is obtained by using the Fourier-phase diagram method, which gives the value of $(1/P_{0})(dP_{0}/dt)=(1.81\\pm0.09) \\"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.00351","kind":"arxiv","version":2},"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"}