{"oa_version":"Published Version","issue":"1","title":"Extreme isolation of WN3/O3 stars and implications for their evolutionary origin as the elusive stripped binaries","scopus_import":"1","quality_controlled":"1","main_file_link":[{"open_access":"1","url":"https://doi.org/10.1093/mnras/stx3181"}],"language":[{"iso":"eng"}],"intvolume":"       475","date_published":"2018-03-01T00:00:00Z","day":"01","year":"2018","article_type":"original","publisher":"Oxford University Press","keyword":["Space and Planetary Science","Astronomy and Astrophysics"],"abstract":[{"text":"Recent surveys of the Magellanic Clouds have revealed a subtype of Wolf–Rayet (WR) star with peculiar properties. WN3/O3 spectra exhibit both WR-like emission and O3 V-like absorption – but at lower luminosity than O3 V or WN stars. We examine the projected spatial distribution of WN3/O3 stars in the Large Magellanic Cloud as compared to O-type stars. Surprisingly, WN3/O3 stars are among the most isolated of all classes of massive stars; they have a distribution similar to red supergiants dominated by initial masses of 10–15 M⊙, and are far more dispersed than classical WR stars or luminous blue variables. Their lack of association with clusters of O-type stars suggests strongly that WN3/O3 stars are not the descendants of single massive stars (30 M⊙ or above). Instead, they are likely products of interacting binaries at lower initial mass (10–18 M⊙). Comparison with binary models suggests a probable origin with primaries in this mass range that were stripped of their H envelopes through non-conservative mass transfer by a low-mass secondary. We show that model spectra and positions on the Hertzsprung–Russell diagram for binary-stripped stars are consistent with WN3/O3 stars. Monitoring radial velocities with high-resolution spectra can test for low-mass companions or runaway velocities. With lower initial mass and environments that avoid very massive stars, the WN3/O3 stars fit expectations for progenitors of Type Ib and possibly Type Ibn supernovae.","lang":"eng"}],"publication":"Monthly Notices of the Royal Astronomical Society","publication_status":"published","author":[{"last_name":"Smith","full_name":"Smith, Nathan","first_name":"Nathan"},{"full_name":"Götberg, Ylva Louise Linsdotter","first_name":"Ylva Louise Linsdotter","orcid":"0000-0002-6960-6911","last_name":"Götberg","id":"d0648d0c-0f64-11ee-a2e0-dd0faa2e4f7d"},{"last_name":"de Mink","full_name":"de Mink, Selma E","first_name":"Selma E"}],"doi":"10.1093/mnras/stx3181","_id":"13474","publication_identifier":{"issn":["0035-8711"],"eissn":["1365-2966"]},"type":"journal_article","extern":"1","volume":475,"date_updated":"2023-08-09T12:17:34Z","oa":1,"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","external_id":{"arxiv":["1704.03516"]},"page":"772-782","status":"public","date_created":"2023-08-03T10:14:47Z","month":"03","citation":{"short":"N. Smith, Y.L.L. Götberg, S.E. de Mink, Monthly Notices of the Royal Astronomical Society 475 (2018) 772–782.","ama":"Smith N, Götberg YLL, de Mink SE. Extreme isolation of WN3/O3 stars and implications for their evolutionary origin as the elusive stripped binaries. <i>Monthly Notices of the Royal Astronomical Society</i>. 2018;475(1):772-782. doi:<a href=\"https://doi.org/10.1093/mnras/stx3181\">10.1093/mnras/stx3181</a>","mla":"Smith, Nathan, et al. “Extreme Isolation of WN3/O3 Stars and Implications for Their Evolutionary Origin as the Elusive Stripped Binaries.” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 475, no. 1, Oxford University Press, 2018, pp. 772–82, doi:<a href=\"https://doi.org/10.1093/mnras/stx3181\">10.1093/mnras/stx3181</a>.","ieee":"N. Smith, Y. L. L. Götberg, and S. E. de Mink, “Extreme isolation of WN3/O3 stars and implications for their evolutionary origin as the elusive stripped binaries,” <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 475, no. 1. Oxford University Press, pp. 772–782, 2018.","ista":"Smith N, Götberg YLL, de Mink SE. 2018. Extreme isolation of WN3/O3 stars and implications for their evolutionary origin as the elusive stripped binaries. Monthly Notices of the Royal Astronomical Society. 475(1), 772–782.","chicago":"Smith, Nathan, Ylva Louise Linsdotter Götberg, and Selma E de Mink. “Extreme Isolation of WN3/O3 Stars and Implications for Their Evolutionary Origin as the Elusive Stripped Binaries.” <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford University Press, 2018. <a href=\"https://doi.org/10.1093/mnras/stx3181\">https://doi.org/10.1093/mnras/stx3181</a>.","apa":"Smith, N., Götberg, Y. L. L., &#38; de Mink, S. E. (2018). Extreme isolation of WN3/O3 stars and implications for their evolutionary origin as the elusive stripped binaries. <i>Monthly Notices of the Royal Astronomical Society</i>. Oxford University Press. <a href=\"https://doi.org/10.1093/mnras/stx3181\">https://doi.org/10.1093/mnras/stx3181</a>"},"article_processing_charge":"No"}