Confirming the Magnetic Field Detection at the Surface of $\chi$ Cyg
Solar and Stellar Astrophysics
2025-12-11 v1
Abstract
We present spectropolarimetric observations of Cygni obtained with Neo-Narval at T\'elescope 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 to ). We measure a mean longitudinal magnetic field of 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.
Keywords
Cite
@article{arxiv.2512.09392,
title = {Confirming the Magnetic Field Detection at the Surface of $\chi$ Cyg},
author = {Alexis Lavail and Arturo López Ariste and Quentin Pilate and Philippe Mathias and Fabrice Herpin and Agnès Lèbre},
journal= {arXiv preprint arXiv:2512.09392},
year = {2025}
}
Comments
3 pages, 1 figure