{"paper":{"title":"Discovery of a hot ultramassive rapidly rotating DBA White Dwarf","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"A. A. Belinski, A. A. Fedoteva, A. V. Dodin, K. A. Postnov, M. S. Pshirkov, O. V. Voziakova, S. A. Potanin, S. G. Zheltoukhov, S. I. Blinnikov","submitted_at":"2020-07-13T17:10:50Z","abstract_excerpt":"We report the discovery of a nearby massive white dwarf with He-H atmosphere. The white dwarf is located at a distance of $74.5\\pm0.9$ pc. Its radius, mass, effective temperature, H/He ratio and age are $R=2500\\pm100$ km, $M=1.33\\pm0.01$ $\\rm M_{\\odot}$, $T_{\\mathrm{eff}}=31200\\pm 1200$ K, ${\\mathrm{H/He}}\\sim0.1$ and $330\\pm40$ Myr, respectively. The observed spectrum is redshifted by $V_{\\mathrm{r}}=+240\\pm15$ km s$^{-1},$ which is mostly attributed to the gravitational redshift. The white dwarf shows a regular stable photometric variability with amplitude $\\Delta g\\approx0.06^{\\mathrm{m}}$ "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.06514","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2007.06514/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"}