2016/04/13 by Rodrigo G. Vieira, R. G. Vieira, A. C. Carciofi +5
Chemistry · Engineering · Physics and Astronomy · #Astrophysics and Star Formation Studies #Chemical Thermodynamics and Molecular Structure #FOS: Physical sciences #Phase Equilibria and Thermodynamics #Solar and Stellar Astrophysics (astro-ph.SR) #astro-ph.SR
paper · pdf · doi:10.48550/arxiv.1604.03775
To appear in conference proceedings "Bright Emissaries: Be Stars as Messengers of Star-Disk Physics", eds. A. Sigut and C. Jones (11 Aug 2014 - 13 Aug 2014, London, Ontario, Canada)
arxiv created 2016/04/13 · openalex publication_date 2016/04/13 · arxiv updated 2016/04/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In the last decade, the viscous decretion disk model has emerged as the new paradigm for Be star disks. In this contribution, we propose a simple analytical model to estimate the continuum infrared excess arising from these circumstellar disks, in the light of the currently accepted scenario. We demonstrate that the disk can be satisfactorily described by a two component system: an inner optically thick region, which we call the pseudo-photosphere, and a diffuse outer part. In particular, a direct connexion between the disk brightness profile and the thermal structure is derived, and then confronted to realistic numerical simulations. This result quantifies how the non-isothermality of the disk ultimately affects both infrared measured fluxes and visibilities.