2010/12/02 by Vikram Ravi, V. Ravi, E. H. Wishnow +8
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics and Star Formation Studies #FOS: Physical sciences #Instrumentation and Methods for Astrophysics (astro-ph.IM) #Solar and Stellar Astrophysics (astro-ph.SR) #Stellar, planetary, and galactic studies #astro-ph.IM #astro-ph.SR
paper · pdf · doi:10.48550/arxiv.1012.0377
8 pages, 3 figures, submitted to the proceedings of the 16th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun (2010 August 29 - September 2, Seattle, USA)
arxiv created 2010/12/02 · openalex publication_date 2010/12/02 · arxiv updated 2010/12/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The dynamics of the surface and inner atmosphere of the red supergiant star Betelgeuse are the subject of numerous high angular resolution and spectroscopic studies. Here, we present three-telescope interferometric data obtained at 11.15 microns wavelength with the Berkeley Infrared Spatial Interferometer (ISI), that probe the stellar surface continuum. We find striking variability in the size, effective temperature, and degree of asymmetry of the star over the years 2006-2009. These results may indicate an evolving shell of optically thick material close to the stellar photosphere.