JWST/MIRI detection of [Ne V], [Ne VI], and [O IV] wind emission in the O9V star 10 Lacertae
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866917833895575552 |
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| author | Law, David R. Hawcroft, Calum Smith, Linda J. Fullerton, Alexander W. Evans, Christopher J. Gordon, Karl D. Kumari, Nimisha Leitherer, Claus |
| author_facet | Law, David R. Hawcroft, Calum Smith, Linda J. Fullerton, Alexander W. Evans, Christopher J. Gordon, Karl D. Kumari, Nimisha Leitherer, Claus |
| contents | We report the detection of broad, flat-topped emission in the fine-structure lines of [Ne V], [Ne VI], and [O IV] in mid-infrared spectra of the O9 V star 10 Lacertae obtained with JWST/MIRI. Optically thin emission in these high ions traces a hot, low-density component of the wind. The observed line fluxes imply a mass-loss rate of > 3 x 10^8 Msun/yr, which is an order of magnitude larger than previous estimates based on UV and optical diagnostics. The presence of this hot component reconciles measured values of the mass-loss rate with theoretical predictions, and appears to solve the "weak wind" problem for the particular case of 10 Lac. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2410_05469 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | JWST/MIRI detection of [Ne V], [Ne VI], and [O IV] wind emission in the O9V star 10 Lacertae Law, David R. Hawcroft, Calum Smith, Linda J. Fullerton, Alexander W. Evans, Christopher J. Gordon, Karl D. Kumari, Nimisha Leitherer, Claus Solar and Stellar Astrophysics We report the detection of broad, flat-topped emission in the fine-structure lines of [Ne V], [Ne VI], and [O IV] in mid-infrared spectra of the O9 V star 10 Lacertae obtained with JWST/MIRI. Optically thin emission in these high ions traces a hot, low-density component of the wind. The observed line fluxes imply a mass-loss rate of > 3 x 10^8 Msun/yr, which is an order of magnitude larger than previous estimates based on UV and optical diagnostics. The presence of this hot component reconciles measured values of the mass-loss rate with theoretical predictions, and appears to solve the "weak wind" problem for the particular case of 10 Lac. |
| title | JWST/MIRI detection of [Ne V], [Ne VI], and [O IV] wind emission in the O9V star 10 Lacertae |
| topic | Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2410.05469 |