dc.contributor.author | Richardson, ND | |
dc.contributor.author | Lee, L | |
dc.contributor.author | Schaefer, G | |
dc.contributor.author | Shenar, T | |
dc.contributor.author | Sander, AAC | |
dc.contributor.author | Hill, GM | |
dc.contributor.author | Fullard, AG | |
dc.contributor.author | Monnier, JD | |
dc.contributor.author | Anugu, N | |
dc.contributor.author | Davies, CL | |
dc.contributor.author | Gardner, T | |
dc.contributor.author | Lanthermann, C | |
dc.contributor.author | Kraus, S | |
dc.contributor.author | Setterholm, BR | |
dc.date.accessioned | 2021-04-14T12:36:47Z | |
dc.date.issued | 2021-02-09 | |
dc.description.abstract | 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 days, 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 MWR = 9.3 ±1.6M⊙ and MO = 22.6 ±3.2M⊙, with the large errors owing to the nearly face-on geometry of the system combined with errors in the spectroscopic parameters. We also derive an orbital parallax that is identical to the Gaia-determined distance. We present a preliminary spectral analysis and atmosphere models of the component stars, and find the mass-loss rate in agreement with polarization variability and our orbit. However, the derived masses are low compared to the spectral types and spectral model. Given the close binary nature, we suspect that WR 133 should have formed through binary interactions, and represents an ideal target for testing evolutionary models given its membership in the cluster NGC 6871. | en_GB |
dc.description.sponsorship | National Science Foundation | en_GB |
dc.description.sponsorship | NOAO community access program | en_GB |
dc.description.sponsorship | European Union Horizon 2020 | en_GB |
dc.description.sponsorship | European Research Council (ERC) | en_GB |
dc.description.sponsorship | Science and Technology Facilities Council (STFC) | en_GB |
dc.description.sponsorship | NASA | en_GB |
dc.identifier.citation | Vol. 908, No. 1, article L3 | en_GB |
dc.identifier.doi | 10.3847/2041-8213/abd722 | |
dc.identifier.grantnumber | AST-1636624 | en_GB |
dc.identifier.grantnumber | AST1715788 | en_GB |
dc.identifier.grantnumber | 17B-0088 | en_GB |
dc.identifier.grantnumber | 639889 | en_GB |
dc.identifier.grantnumber | 772225 | en_GB |
dc.identifier.grantnumber | ST/R000565/1 | en_GB |
dc.identifier.grantnumber | NNX16AD43G | en_GB |
dc.identifier.grantnumber | 1909165 | en_GB |
dc.identifier.grantnumber | 639889 | en_GB |
dc.identifier.uri | http://hdl.handle.net/10871/125361 | |
dc.language.iso | en | en_GB |
dc.publisher | IOP Publishing / American Astronomical Society | en_GB |
dc.rights.embargoreason | Under embargo until 9 February 2022 in compliance with publisher policy | en_GB |
dc.rights | © 2021. The American Astronomical Society. All rights reserved. | en_GB |
dc.subject | Interferometric binary stars | en_GB |
dc.subject | Wolf-Rayet stars | en_GB |
dc.subject | Spectroscopic binary stars | en_GB |
dc.subject | WN stars | en_GB |
dc.subject | O supergiant stars | en_GB |
dc.subject | Massive stars | en_GB |
dc.subject | Stellar masses | en_GB |
dc.title | The first dynamical mass determination of a nitrogen-rich Wolf-Rayet star using a combined visual and spectroscopic orbit | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2021-04-14T12:36:47Z | |
dc.identifier.issn | 2041-8205 | |
dc.description | This is the author accepted manuscript. The final version is available from IOP Publishing via the DOI in this record | en_GB |
dc.identifier.eissn | 2041-8213 | |
dc.identifier.journal | Astrophysical Journal Letters | en_GB |
dc.rights.uri | http://www.rioxx.net/licenses/all-rights-reserved | en_GB |
dcterms.dateAccepted | 2020-12-23 | |
rioxxterms.version | AM | en_GB |
rioxxterms.licenseref.startdate | 2021-02-09 | |
rioxxterms.type | Journal Article/Review | en_GB |
refterms.dateFCD | 2021-04-14T12:25:17Z | |
refterms.versionFCD | AM | |
refterms.panel | B | en_GB |