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OPserver: interactive online computations of opacities and radiative accelerations
Authors:C Mendoza  M J Seaton  P Buerger  A Bellorín  M Meléndez †  J González  L S Rodríguez  F Delahaye  E Palacios  A K Pradhan  C J Zeippen
Institution:Centro de Física, Instituto Venezolano de Investigaciones Científicas (IVIC), PO Box 21827, Caracas 1020A, Venezuela;Centro Nacional de Cálculo Científico Universidad de Los Andes (CeCalCULA), Mérida 5101, Venezuela;Department of Physics and Astronomy, University College London, London WC1E 6BT;Ohio Supercomputer Center, Columbus, OH 43212, USA;Escuela de Física, Facultad de Ciencias, Universidad Central de Venezuela, PO Box 20513, Caracas 1020A, Venezuela;Departamento de Física, Universidad Simón Bolívar, PO Box 89000, Caracas 1080A, Venezuela;Escuela de Computación, Facultad de Ciencia y Tecnología, Universidad de Carabobo, Valencia, Venezuela;Centro de Química, Instituto Venezolano de Investigaciones Científicas (IVIC), PO Box 21827, Caracas 1020A, Venezuela;LUTH, Observatoire de Paris, F-92195 Meudon, France;Department of Astronomy, The Ohio State University, Columbus, OH 43210, USA
Abstract:Codes to compute mean opacities and radiative accelerations for arbitrary chemical mixtures using the Opacity Project recently revised data have been restructured in a client–server architecture and transcribed as a subroutine library. This implementation increases efficiency in stellar modelling where element stratification due to diffusion processes is depth dependent, and thus requires repeated fast opacity re-estimates. Three user modes are provided to fit different computing environments, namely, a web browser, a local workstation and a distributed grid.
Keywords:atomic processes  radiative transfer  stars: interior
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