{"paper":{"title":"The Host Galaxy of FRB 20190520B and Its Unique Ionized Gas Distribution","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Casey Law, Chao-Wei Tsai, Chenhui Niu, Christopher D. Bochenek, Daniel Stern, Di Li, Gan Luo, Guodong Li, Mai Liao, Pei Wang, Roberto J. Assef, Sean E. Lake, Shami Chatterjee, Xiang-Lei Chen, Yi Feng, Yuu Niino","submitted_at":"2025-03-03T17:00:39Z","abstract_excerpt":"The properties of host galaxies associated with Fast Radio Bursts (FRBs) provide critical information for inferring the progenitors and radiation mechanisms of these bursts. We report on the host galaxy of the repeating FRB 20190520B, a dwarf galaxy at the spectroscopic redshift $z=0.241$ with a stellar mass of $(6.2 \\pm 0.8) \\times 10^8 \\ M_{\\odot}$. The emission line ratios suggest that the ionized gas is powered by star formation. The total H$\\alpha$-traced star formation rate (SFR) is $0.70 \\pm 0.01 \\ {M_{\\odot} ~ \\rm yr^{-1}}$, and the metallicity is $\\rm 12+log_{10} ([O/H]) \\geq 7.4 \\pm "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2503.01740","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/2503.01740/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"}