2008/07/01 by J. Sanz‐Forcada, J. Sanz-Forcada, A. K. Dupree · 1 citation
Physics and Astronomy · #Astrophysics and Star Formation Studies #Solar and Space Plasma Dynamics #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1051/0004-6361:20078501
9 pages, 12 figures. Accepted by A&A (June 2008)
arxiv created 2008/07/01 · openalex publication_date 2008/07/09 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31
Context. The mechanism of formation of the He I 10 830 Å triplet in cool stars has been subject of debate for the last 30 years. A relation between the X-ray luminosity and the He I 10 830 Å flux was found in cool stars, but the dominant mechanism of formation in these stars (photoionization by coronal radiation followed by recombination and cascade, or collisional excitation in the chromosphere), has not yet been established.