Data Services

Opacities

Mean Opacities can be provided for hydrogen-rich, molecule dominated gases.

Rosseland and Planck mean gas-phase opacity tables
from Helling & Lucas (2009)
ReadMe for content and structure of data files

Mean Opacity Tables for (M/H)’=-2.0 (tar-file , unzip with -xvzf)
Mean Opacity Tables for (M/H)’=-3.0 (tar-file )
Mean Opacity Tables for (M/H)’=-4.0 (tar-file )
Mean Opacity Tables for (M/H)’=-5.0 (tar-file )

The means are based on a data collection from the Copenhagen SCAN data baseand the HITRAN data base.

Mean opacities have been calcualed for
AGB stars (Helling et al. 2000),
planetary atmospheres (Frakis 2001),
protoplanetary disks (Semenov et al. 2003),
planetary and stellar evolution (Helling & Lucas 2009)

Literature:
Helling & Lucas 2008, MNRAS 398, 985′
Semenov, Henning, Helling, Ilgner, Sedlmayr 2003, A&A 410, 611
Helling, Winters, Sedlmay 2000, A&A 358, 651-664
Schnabel (2001) – Master Thesis, TU Berlin, Germany
Helling (1999) – PhD Theses, TU Berlin, Germany

opacity

reference for figure
Observed molecules in the ISM, comets, planetary atmospheres (except the Earth), as well as several other molecules, not yet detected, but which are believed to be of astrophysical importance:

CONSTANTS FOR MOLECULES OF ASTROPHYSICAL INTEREST IN THE GAS PHASE: PHOTODISSOCIATION, MICROWAVE AND INFRARED SPECTRA.

by Jacques Crovisier (Observatoire de Paris-Meudon)

Tables of Optical Constants

(Astrophysical Institute, University Jena)