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Título : A study of accretion disk wind emission
Autor : Puebla, Raul
Díaz, Marcos
Palabras clave : DISCO DE ACRECIÓN
ATMÓSFERAS
VIENTO
CATACLÍSMICO VARIABLES
Fecha de publicación : 2012
Editorial : [s.d.t]
Citación : Puebla, Raul y Díaz, Marcos (2012). A study of accretion disk wind emission.
Resumen : Accretion disk wind has been the most accepted scenario to explain the strong emission lines and the P Cyg profiles detected in the ultraviolet spectra of non-magnetic cataclysmic variables (CV’s). Due to the main characteristics of line profiles, it is commonly accepted that those winds are radiatively driven. Here, we present an alternative method to study the disk-wind that takes into account the structure of whole system (disk+wind), as well as the interface between the disk photosphere and wind. We calculated a set of 1D NLTE atmosphere wind models with a consistent velocity wind profile, and map them into a 2D model including a 3D velocity field. The synthetic spectrum is calculated by exactly solving the radiative transfer equation throughout the inner disk, interface region and wind, taking into account the Doppler shifts for each step. We found a modeled line profile behavior according with the observed one. We also found dependences between line profiles and disk parameters. When tested with UV data for two nova-like systems, the models shows a good agreement. However, we found a lack a flux for high ionization lines. It is possible that it is due to the influence of the inner disk radiation on the outer wind regions.
URI : http://www.dspace.uce.edu.ec/handle/25000/14475
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