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Richardson, Stefan Kraus, Tomer Shenar, Tyler Gardner","submitted_at":"2021-01-11T23:18:44Z","abstract_excerpt":"We present the first visual orbit for the nitrogen-rich Wolf-Rayet binary, WR 133 (WN5o + O9I) based on observations made with the CHARA Array and the MIRC-X combiner. This orbit represents the first visual orbit for a WN star and only the third Wolf-Rayet star with a visual orbit. The orbit has a period of 112.8 d, a moderate eccentricity of 0.36, and a separation of $a$= 0.79 mas on the sky. We combine the visual orbit with an SB2 orbit and Gaia parallax to find that the derived masses of the component stars are $M_{\\rm WR}$ = $9.3\\pm1.6 M_\\odot$ and $M_{\\rm O}$ = $22.6\\pm 3.2 M_\\odot$, with"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2101.04232","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-01-11T23:18:44Z","cross_cats_sorted":[],"title_canon_sha256":"5ea4d9480b7db10d064a22bd6e08c176f347e6d20920599fd98fed9e8dd0a629","abstract_canon_sha256":"0f328b1393efc49a0d71d0e46f93b0491a2cad84ceceb1032cb808e7b420eda0"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:15:40.264911Z","signature_b64":"sMsZbesS5zELnESLAMsrlrxRLx1pi2AWAYG3Of+vXQGkphidKRSW32JZAtzQu4n+X4HMC8llfwZC4XTpu51aAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7b5807b428ff5a250ab5fe9663c2c647beaad7316d9b5e54c9994e372eb6e04e","last_reissued_at":"2026-07-05T02:15:40.264431Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:15:40.264431Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The First Dynamical Mass Determination of a Nitrogen-rich Wolf-Rayet Star using a Combined Visual and Spectroscopic Orbit","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Andreas A. 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