Abstract

VO Software for the Spectral Analysis of Hot Stars

Thomas Rauch (IAAT, Tübingen, Germany)

Iliya Nickelt (AIP, Postdam, Germany); Lars Koesterke (TACC, Austin, USA)

In a collabration of the German Astrophysical Virtual Observatory (GAVO) and AstroGrid-D, the German Astronomy Community Grid (GACG), we provide a VO service for the access and the calculation of stellar synthetic energy distributions (SEDs) based on static as well as expanding non-LTE model atmospheres. At three levels, a VO user may directly compare observed and theoretical SEDs: The easiest and fastest way is to use pre-calculated SEDs from the GAVO database. For individual objects, grids of model atmospheres and SEDs can be calculated on the compute resources of AstroGrid-D within resonable wallclock time. Experienced VO users may even create own atomic-data files for a more detailed analyses. This VO service opens also the perspective for a new approach to an automated spectral analysis of a large number of observations, e.g. provided by multi-object spectrographs.

Mode of presentation: poster