Creating and using large grids of pre-calculated model atmospheres for rapid analysis of stellar spectra

János Zsargó
National Inst. for Nuclear Research (ININ), Mexico


Nowadays many sophisticated stellar atmosphere code exist for the analysis of massive star spectra. They model the full spectrum, and has been used to model OB stars, W-R stars, luminous blue variables, and even supernovae. However, they normally require the user to have substantial knowledge and experience in calculating synthetic spectra, and even then a complete analysis of a star can be very difficult and time-consuming.
Computations and modelling are greatly eased when suitable initial models are available. To expedite modelling, or to run a quick rudimentary analysis of the stellar spectra, we are undertaking a project to create a mega-grid of pre-calculated stellar atmosphere models (using the code CMFGEN) which will be available to the general astronomical community via internet. Tools are also being developed to use this database for analysis.