2016/08/25 by J. Krtička, J. Krticka
Physics and Astronomy · Social Sciences · #Astrophysics and Star Formation Studies #Educational Leadership and Practices #K-type main-sequence star #Light curve #Magnetic field #O-type star #Radiative transfer #Stars #Starspot #Stellar, planetary, and galactic studies #astro-ph.SR
paper · pdf · doi:10.1051/0004-6361/201629222
published as A&A 594, A75 (2016) · 5 pages, accepted for publication in A&A
arxiv created 2016/08/25 · openalex publication_date 2016/08/26 · openalex created_date 2016/09/16 · arxiv updated 2016/10/19 · openalex updated_date 2026/08/05
Context. A small fraction of hot OBA stars host global magnetic fields with field strengths of the order of 0.1−10 kG. This leads to the creation of persistent surface structures (spots) in stars with sufficiently weak winds as a result of the radiative diffusion. These spots become evident in spectroscopic and photometric variability. This type of variability is not expected in stars with strong winds, where the wind inhibits the radiative diffusion. Therefore, a weak photometric variability of the magnetic Of?p star HD 191612 is attributed to the light absorption in the circumstellar clouds.