En esta contribuci´on presentamos códigos que permiten la rápida solución de problemas de transporte radiativo y que pueden ser de gran interés para la interpretación de espectros obtenidos con GTC y su instrumentacion post-foco. Tales códigos estan basados en los métodos iterativos de transporte radiativ o introducidos por Trujillo Bueno & Fabiani Bendicho (1995). Presentamos resultados de la generalizacion de estos metodos a transiciones moleculares y a geometrıa esférica con campos de velocidad macroscopicos. Mostramos el interés de tener un espectrografo de media–alta resolucion para poder resolver la estructura rotacional de las bandas. Mostramos observaciones espectropolarimetricas de lıneas de OH realizadas con el polarımetro TIP (Tenerife Infrared Polarimeter) desarrollado en el IAC y su interpretacion teorica.

We present very fast radiative transfer tools of interest for the interpretation of future spectroscopic observations taken with the GTC and its post-focus instrumentation. Our radiative transfer codes are based on the iterative methods introduced by Trujillo Bueno & Fabiani Bendicho (1995). Taking into consideration spherical geometry and macroscopic velocity fields, we present results from the application of these fast radiative transfer methods. We show why it is of interest to develop a medium–high resolution spectrograph in order to be able to resolve the rotational structure of the molecular bands. We show some spectropolarimetric observations made with the Tenerife Infrared Polarimeter (TIP), developed at the IAC and the theoretical modeling done with the theoretical tools we have developed.

This work was partly funded by the Ministerio de Ciencia y Tecnologıa through grant AYA2001-1649

5 pags., 5 figs.

Peer reviewed