FORTRAN PROGRAMS AND DATA FOR MODELING CIA OPACITIES 
OF VARIOUS MOLECULAR COMPLEXES FOR APPLICATION 
TO PLANETARY AND STELLAR ATMOSPHERES

You may want to get a postscript file describing all available data. 
This is an unpublished document, updated continuously as new programs and/or data become available.

List of available programs and data

H2-H2, RT CIA, 40-300K

Refer to the original paper describing the procedure:

J. Borysow, L. Trafton, L. Frommhold and G. Birnbaum,
"Modeling of pressure-induced far-infrared absorption spectra. Molecular hydrogen pairs"
Astrophysical Journal, vol. 296, pp. 644--654, (1985).

H2-H2, RT CIA, 600-7000K

Refer to the original paper describing the procedure:

C. Zheng and A. Borysow,
"Rototranslational CIA spectra of H2-H2 at temperatures between 600 and 7000K",
Astrophysical Journal, vol. 441, 960-965, 1995.

H2-H2, RV CIA, fundamental band, 20-350K

Refer to the original paper describing the procedure:

A. Borysow,
"Modeling of collision-induced infrared absorption spectra of H2-H2 pairs in the fundamental band at temperatures from 20 to 300K",
Icarus, vol.92, 273 (1991).
This is an updated version (ver. 2), see erratum:
A. Borysow, Icarus, 614, vol. 106, (1993).

H2-H2, RV CIA, fundamental band, 600-5000 K

Refer to the original paper describing the procedure:

A. Borysow and L. Frommhold;
"A new computation of the infrared absorption by H2 pairs in the fundamental band at temperatures from 600 to 5000K",
Astrophysical Journal Letters, vol. 348, pp. L41-L43, (1990).

H2-H2, RV CIA, first overtone band, 20-500 K

Refer to the original paper describing the procedure:

C. Zheng and A. Borysow,
"Modeling of collision-induced infrared absorption spectra of H2-H2 pairs in the first overtone band at temperatures from 20 to 500 K";
Icarus, 84-90, vol.113, 1995.

H2-H2, RV CIA, second overtone band, 20-500 K

Refer to the original paper, based on pure theory, describing the procedure:

A. Borysow and Y. Fu,
"Computational model of collision induced infrared absorption spectra of H2-H2 complexes in the second overtone band
of hydrogen at temperatures from 20 to 500 K",
This is an unpublished writeup, 1998.
Figures accompanying the paper: Fig.1,Fig.2,Fig.3,Fig.4, You'll need a data file (par.beta) to run this program.

H2-H2, RV CIA, second overtone band, 50-500 K

Refer to the original paper describing the procedure:

Aleksandra Borysow, Jacek Borysow and Y. Fu,
"Semiempirical Model of Collision Induced Infrared Absorption Spectra of H2-H2 Complexes in the Second Overtone Band of Hydrogen at Temperatures from 50 to 500 K"
Icarus, vol 145, pp. 601-608 (2000).
This program is superior to the one based on pure theory (see above).
The program allows for a free choice of para-to-ortho hydrogen ratio. You'll need to download a data file (par.beta) to run this program.

H2-H2, CIA data at 60K to 350K, 0-15,000 cm^-1, (10cm^-1),
given in a tabular form


A. Borysow,
"Collision induced absorption coefficients of H2 pairs at temperatures from 60K to 1000K",
Astron. & Astrophys., 390, p. 779-782, 2002.
The pdf version of the paper is available here

H2-H, CIA data 1000--2500K, 100--10,000 cm^-1, based on quantum mechanical computations.

The units for the absorption are cm^-1/amagat^2.

Please, refer to the following paper:
M. Gustafsson, and L. Frommhold,
"The H2-H infrared absorption bands at temperatures from 1000K to 2500K" (a pdf file),
A&A, 2003, in press, you can see the A&A abstract here.
The data are provided by Magnus Gustafsson,
magnus at domain physics.utexas.edu

H2-H2, CIA data 1000-7000K, all bands

Refer to the original paper describing the procedure:

A. Borysow, U. G. Jorgensen and C. Zheng,
"Model atmospheres of cool, low metallicity stars: The importance of collision-induced absorption",
Astronomy and Astrophysics, vol. 324, 185-195, 1997.
Important note: When/if publishing the results obtained thanks to using these data, you are requested to cite the abovementioned reference.

H2-H2, CIA data 1000-7000K, 20-20,000 cm^-1, based on quantum mechanical computations.

Please, refer to the following paper:

A. Borysow, U. G. Jorgensen and Y. Fu,
"High temperature (1000-7000K) collision induced absorption of H2 pairs computed from the first principles, with application to cool and dense stellar atmospheres",
JQSRT, vol. 68, p. 235--255, 2001.

H2-H2, CIA data at 400K to 1000K, 0-17,000 cm^-1, (10cm^-1),
given in a tabular form


A. Borysow,
"Collision induced absorption coefficients of H2 pairs at temperatures from 60K to 1000K",
Astron. & Astrophys., accepted, April 8, 2002.
The pdf version of the paper is available here

H2-He, RT CIA, 40-3000K

Refer to the original paper describing the procedure:

J. Borysow, L. Frommhold and G. Birnbaum,
"Collison-induced rototranslational absorption spectra of H2-He pairs at temperatures from 40 to 3000K"
Astrophysical Journal, vol. 326, p.509-515, (1988).

H2-He, RV CIA, fundamental band, 20-300K

Refer to the original paper describing the procedure:

A. Borysow,
"New model of collision-induced infrared absorption spectra of H2-He pairs in the 2-2.5 micrometer region at temperatures from 20 to 300K: An update",
Icarus, vol. 96, p. 169-175, (1992).

H2-He, RV CIA, all bands (see papers), 20-7000K

Refer to the original papers describing the procedure:

For the fundamental band:
A. Borysow, L. Frommhold and M. Moraldi,
"Collision-induced infrared spectra of H2-He pairs involving 0 --> 1 vibrational transitions and temperatures from 18 to 7000K",
Astrophysical Journal; vol. 336, p. 495-503, (1989).
and for the overtones & hot bands:
A. Borysow and L. Frommhold,
"Collision-induced infrared spectra of H2-He pairs at temperatures from 18 to 7000K. II. Overtone and hot bands",
Astrophysical Journal, vol. 341, 549-555, (1989).

To run this program you will need several data files:

H2-He, CIA data 1000-7000K, all bands

Refer to the original paper describing the procedure:

A. Borysow, U. G. Jorgensen and C. Zheng,
"Model atmospheres of cool, low metallicity stars: The importance of collision-induced absorption",
Astronomy and Astrophysics, vol. 324, 185-195, 1997.
Important note: When/if publishing the results obtained thanks to using these data, you are requested to cite the abovementioned reference.

H2-He, CIA data 1000-7000K, 25-20,000 cm^-1, data based on quantum mechanical computations.

Please, refer to the following paper:

U. G. Jorgensen, D. Hammer, A. Borysow and J. Falkesgaard,
"The atmospheres of cool, helium-rich white dwarfs",
Astronomy & Astrophysics, vol. 361, p. 283--292, 2000.
The data from 25-800 cm^-1 due to courtesy of Dominik Hammer.

H-He, CIA data 1500-10,000K, 50-11,000 cm^-1, based on quantum mechanical computations.

The units for the absorption are cm^-1/amagat^2.

Please, refer to the following paper:
M. Gustafsson, and L. Frommhold,
"Infrared Absorption Spectra of Collisionally Interacting He and H Atoms",
Astrophys. J. 546, 1168 (2001).
The data are provided by Magnus Gustafsson.
You can contact Magnus at:magnus at domain physics.utexas.edu

H2-CH4, RT CIA, 50-300K

Refer to the original paper describing the procedure:

A. Borysow and L. Frommhold,
"Theoretical collision induced rototranslational absorption spectra for the outer planets: H2-CH4 pairs",
Astrophysical Journal, vol. 304, 849 - 865, 1986.

You'll need a data file corrch4 to run this program.

PROGRAMS ESPECIALLY VALUABLE FOR THE ATMOSPHERE OF TITAN

N2-N2, RT CIA, 50-300K

Refer to the original paper describing the procedure:

Aleksandra Borysow and Lothar Frommhold,
"Collision induced rototranslational absorption spectra of N2-N2 pairs for temperatures from 50 to 300K",
Astrophysical Journal, vol. 311, pages 1043-1057, (1986).
Note erratum:
A. Borysow and L. Frommhold,
Erratum to: "Collision-induced Rototranslational Absorption Spectra of N2-N2 Pairs for Temperatures from 50 to 300K", (Ap. J. 311, 1043-1057, 1986);
Astrophys. Journal, vol. 320, 437, 1987.

N2-CH4, RT CIA, 70-300K

Refer to the original paper describing the procedure:

A. Borysow and C. Tang,
"Far infrared CIA spectra of N2-CH4 pairs for modeling of Titan's atmosphere",
Icarus, vol. 105, p.175-183, (1993).

N2-H2, RT CIA, 50-300K

Refer to the original paper describing the procedure:

A. Borysow and L. Frommhold,
"Theoretical collision induced rototranslational absorption spectra for modeling Titan's atmosphere: H2-N2 pairs",
Astrophysical Journal, vol. 303, p. 495-510, (1986).

CH4-CH4, RT CIA, 50-300K

Refer to the original paper describing the procedure:

A. Borysow and L. Frommhold,
"Collision induced rototranslational absorption spectra of CH4-CH4 pairs at temperatures from 50 to 300K",
Astrophysical Journal, vol.318, p.940-943, (1987).
Program uses file corrch4, look under H2-CH4 case and download the file there.
Compile with NO optimization (f77 -O0 chchcl.for).

PROGRAM USEFUL FOR THE ATMOSPHERE OF VENUS

CO2-CO2, RT CIA, 200-800K

Refer to the original paper describing the procedure:

M. Gruszka and A. Borysow,
"Roto-translational collision-induced absorption of CO2 for the atmosphere of Venus at frequencies from 0 to 250 cm^-1
and at temperature from 200K to 800K",
Icarus, vol. 129, pp. 172-177, (1997).

UNPUBLISHED PROGRAMS USEFUL FOR THE PLANETARY ATMOSPHERES

CH4-AR, RT CIA, 70-300K

Refer to the original paper describing the program:

R. E. Samuelson and N. Nath and A. Borysow,
"Gaseous abundances and methane supersaturation in Titan's troposphere",
Planetary & Space Sciences, vol. 45/8, pp. 959-980, 1997.

H2-AR, RT CIA, 60-300K

Refer to the original paper describing the program:

R. E. Samuelson and N. Nath and A. Borysow,
"Gaseous abundances and methane supersaturation in Titan's troposphere",
Planetary & Space Sciences, vol. 45/8, pp. 959-980, 1997.

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Last modified by Aleksandra G. Jørgensen January 2002

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