{"paper":{"title":"WFPC2 Observations of Compact Star Cluster Nuclei in Low Luminosity Spiral Galaxies","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Alan M. Watson, Christopher J. Burrows, David Crisp, Gilda E. Ballester, III, James A. Westphal, Jeremy R. Mould, J. Jeff Hester, John E. Krist, John G. Hoessel, John S. Gallagher, John T. Clarke, John T. Trauger, Jon A. Holtzman, Karl R. Stapelfeldt, Lynn D. Matthews (NRAO), Paul A. Scowen, Richard E. Griffiths, Robin W. Evans","submitted_at":"1999-04-15T22:41:16Z","abstract_excerpt":"We have used the Wide Field Planetary Camera 2 aboard the Hubble Space Telescope to image the compact star cluster nuclei of the nearby, late-type, low-luminosity spiral galaxies NGC 4395, NGC 4242, and ESO 359-029. We also analyze archival WFPC2 observations of the compact star cluster nucleus of M33. A comparative analysis of the structural and photometric properties of these four nuclei is presented. All of the nuclei are very compact, with luminosity densities increasing at small radii to the resolution limit of our data. NGC 4395 contains a Seyfert 1 nucleus with a distinct bipolar struct"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9904205","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"}