{"schema":"hottub-news/story/v1","story":"st_apvtetimgpo63ixzksea","title":"Large-Scale Spiral Structure of the Milky Way Traced by Young Classical Cepheids","title_en":null,"outlets":1,"brief":null,"page":"https://hottub.news/stories/large-scale-spiral-structure-of-the-milky-way-traced-by-young-classical-apvtetimgp","count":1,"items":[{"id":"n_apvtetimgpo63ixzksea","seq":608077,"kind":"research","title":"Large-Scale Spiral Structure of the Milky Way Traced by Young Classical Cepheids","url":"https://arxiv.org/abs/2609.34208","summary":"arXiv:2609.34208v1 Announce Type: new Abstract: Using 985 classical Cepheids younger than 100 Myr, we investigate the large-scale spiral structure of the Milky Way by comparing their spatial and kinematic distributions with the R19 (four-arm) and X23 (multiple-arm) spiral-arm models. Both models provide reasonably good descriptions of the current sample: R19 yields slightly smaller point-to-arm distances, whereas X23 has a higher supported-arm fraction, but the descriptive…","published":"2026-09-29T04:00:00Z","seen":"2026-09-29T07:46:41Z","lang":"en","source":{"id":"arxiv-astro-ph","name":"arXiv astro-ph (astrophysics)","domain":"arxiv.org","outlet":{"wikidata":"Q118398","name":"arXiv","type":"website","country":"US","designations":["bibliographic database","disciplinary repository","online database","open science tool","preprint server","website"]}},"via":"arxiv-astro-ph","topics":["space","astrophysics","astro-ph.ga"],"authors":["Z. H. Lin, C. J. Hao, D. J. Liu, Y. J. Li, J. J. Li, Y. W. Dong, Y. X. He…"],"entities":[{"id":"Q1752705","name":"Milky Way","type":"place"}],"story":"st_apvtetimgpo63ixzksea","category":"science-technology","category_p":0.6200000047683716,"sentiment":"neutral","tone":0.15000000596046448,"political":0.019999999552965164}]}