Título
How Significant is Radiation Pressure in the Dynamics of the Gas Around Young Stellar Clusters?
Autor
SERGIY SILICH
GUILLERMO TENORIO TAGLE
Nivel de Acceso
Acceso Abierto
Materias
Resumen o descripción
The impact of radiation pressure on the dynamics of the gas in the vicinity of young stellar clusters is thoroughly discussed. The radiation over the thermal/ram pressure ratio time evolution is calculated explicitely and the crucial role of the cluster mechanical power and of the strong time evolution of the ionizing photon flux and of the bolometric luminosity of the exciting cluster is stressed. It is shown that radiation has only a narrow window of opportunity to dominate the wind-driven shell dynamics. This may occur only at early stages of the bubble evolution and if the shell expands into a dusty and/or a very dense proto-cluster medium. The impact of radiation pressure on the wind-driven shell becomes always negligible after about 3 Myr. Finally, the wind-driven model results allow one to compare the model predictions with the distribution of thermal pressure derived from X-ray observations. The shape of the thermal pressure profile allows then to distinguish between the energy and the momentum dominated regimes of expansion and thus conclude whether radiative losses of energy or the leakage of hot gas from the bubble interior have been significant during the bubble evolution.
Editor
The Astrophysical Journal
Fecha de publicación
11 de enero de 2013
Tipo de publicación
Artículo
Versión de la publicación
Versión aceptada
Recurso de información
Formato
application/pdf
Idioma
Inglés
Audiencia
Estudiantes
Investigadores
Público en general
Sugerencia de citación
Silich, Sergiy and Tenorio-Tagle, Guillermo, (2013), How Significant is Radiation Pressure in the Dynamics of the Gas Around Young Stellar Clusters?, The Astrophysical Journal, Vol. 756(1):1-22
Repositorio Orígen
Repositorio Institucional del INAOE
Descargas
993