Mean gas opacity for circumstellar environments and equilibrium temperature degeneracy

2014/07/23 by M. G. Malygin, R. Kuiper, H. Klahr +2
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics and Star Formation Studies #Degeneracy (biology) #Galaxies: Formation, Evolution, Phenomena #Molecular cloud #Opacity #Optical depth #Planck #Radiation pressure #Radiative equilibrium #Radiative transfer #Stars #astro-ph.SR

paper · pdf · doi:10.1051/0004-6361/201423768

published as A&A 568, A91 (2014) · 8 pages, 8 Postscript figures

openalex publication_date 2014/07/23 · arxiv created 2014/08/14 · arxiv updated 2014/09/05 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Context. In a molecular cloud dust opacity typically dominates over gas opacity, yet in the vicinities of forming stars dust is depleted, and gas is the sole provider of opacity. In the optically thin circumstellar environments the radiation temperature cannot be assumed to be equal to the gas temperature, hence the two-temperature Planck means are necessary to calculate the radiative equilibrium.

Citations

• Outer boundary conditions for evolving cool white dwarfs
• RADIATION TRANSFER OF MODELS OF MASSIVE STAR FORMATION. I. DEPENDENCE ON BASIC CORE PROPERTIES
• On the gas temperature in circumstellar disks around A stars
• Gas-phase mean opacities for varying [M/H], N/O and C/O
• Low‐Temperature Opacities