Confirming the Magnetic Field Detection at the Surface of $χ$ Cyg
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866909953727397888 |
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| author | Lavail, Alexis Ariste, Arturo López Pilate, Quentin Mathias, Philippe Herpin, Fabrice Lèbre, Agnès |
| author_facet | Lavail, Alexis Ariste, Arturo López Pilate, Quentin Mathias, Philippe Herpin, Fabrice Lèbre, Agnès |
| contents | We present spectropolarimetric observations of $χ$ Cygni obtained with Neo-Narval at Télescope Bernard Lyot in 2025. We obtained observations across three epochs (2025 Jul, Aug, and Oct) near maximum light to search for magnetic field signatures at the stellar photosphere. We detected a clear circular polarization signal in the 2025 Aug observations (pulsation phases $0.99$ to $0.01$). We measure a mean longitudinal magnetic field of $B_l = 3.4 \pm 0.6$ G. No detections were obtained for the 2025 Jul and Oct epochs. The pulsation-phase dependence suggests that field detection is tied to specific shock conditions near maximum light. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_09392 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Confirming the Magnetic Field Detection at the Surface of $χ$ Cyg Lavail, Alexis Ariste, Arturo López Pilate, Quentin Mathias, Philippe Herpin, Fabrice Lèbre, Agnès Solar and Stellar Astrophysics We present spectropolarimetric observations of $χ$ Cygni obtained with Neo-Narval at Télescope Bernard Lyot in 2025. We obtained observations across three epochs (2025 Jul, Aug, and Oct) near maximum light to search for magnetic field signatures at the stellar photosphere. We detected a clear circular polarization signal in the 2025 Aug observations (pulsation phases $0.99$ to $0.01$). We measure a mean longitudinal magnetic field of $B_l = 3.4 \pm 0.6$ G. No detections were obtained for the 2025 Jul and Oct epochs. The pulsation-phase dependence suggests that field detection is tied to specific shock conditions near maximum light. |
| title | Confirming the Magnetic Field Detection at the Surface of $χ$ Cyg |
| topic | Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2512.09392 |