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OPAL OPACITY TABLES
The element abundances are defined by X (hydrogen mass fraction), Y (helium mass fraction), and Z (metal mass fraction) where X+Y+Z=1. There are 19 metals included in the calculations and their relative abundance also have to be specified. There are currently two types of OPAL Rosseland mean opacity tables available and supported by interpolation codes. The latter allow interpolation for Rosseland mean opacities as well as first derivatives.
Follow this link for a list of the atomic masses assumed in these calculations.
The most recent paper describing these calculations is C. A. Iglesias and F. J. Rogers, Astrophys. J. 464, 943 (1996).
Type 1 Tables - fixed metal distribution
Type 2 Tables - enhanced C & O
Type 1 Tables
A set of tables with a fix relative metal distribution (e.g., fixed [Fe]/[O]). A set consists of 126 tables with different X and Z values.
The supporting code for type 1 tables is XZTRIN21.f interpolating in R, T, X, and Z. Details of how to use the interpolation code are given as comments in the source file.
The following Type 1 tables are available and differ only in their relative metal distribution. A detailed description the contents of each set can be found in the header of the file and in the header of the XZTRIN21.f interpolation code. Each table is available as clear ASCII text and in several compressed formats.
(Some browsers will simply display the ASCII text version of these tables without prompting you. To save them to your local disk you will need to use a "File | Save As..." command, or "Save Link As..." command from the browser.)
Solar composition, N. Grevesse and A. Noels (1993) in In Origin and Evolution of the Elements, eds. M. Pratzo, E. Vangioni-Flam and M. Casse (Cambridge: Cambridge Univ. Press).
| filename | file type | approx. size |
|
GN93hz GN93hz.Z GN93hz.zip GN93hz.gz |
ASCII text COMPRESS binary ZIP binary GZIP binary |
1199 KB 356 KB 336 KB 323 KB |
Alpha enhanced elements, private communication with B. Chaboyer (1995) Steward Observatory, University of Arizona, Tucson, AZ 85721, USA.
| filename | file type | approx. size |
|
C95hz C95hz.Z C95hz.zip C95hz.gz |
ASCII text COMPRESS binary ZIP binary GZIP binary |
1199 KB 355 KB 333 KB 320 KB |
Alpha enhanced elements, private communication with Achim Weiss (1995), Max-Planck-Institut for Astrophysics, Postfach 1523, Karl-Schwarzschild-Str. 1, D-85740 Garching, Federal Republic of Germany, e-mail: weiss@mpa-garching.mpg.de, Tel: +49-89-3299-3213, FAX: +49-89-3299-3235.
| filename | file type | approx. size |
|
W95hz W95hz.Z W95hz.zip W95hz.gz |
ASCII text COMPRESS binary ZIP binary GZIP binary |
1199 KB 355 KB 332 KB 319 KB |
Alpha enhanced elements, private communication with F. Allard (1996) Dept. of Physics, Wichita State Univ., 1845 Fairmount, Wichita, KS 67260-0032, USA.
| filename | file type | approx. size |
|
Alrd96a2 Alrd96a2.Z Alrd96a2.zip Alrd96a2.gz |
ASCII text COMPRESS binary ZIP binary GZIP binary |
1199 KB 356 KB 333 KB 321 KB |
Type 2 Tables
A set of tables with a fixed relative metal distribution but where the mass fractions of two metals, say i and j (with 6 < atomic number < 14), are allowed to increase by dX(i) and dX(j), independent of the initial metal distribution. A subset consists of tables (exact number depends on composition) at fixed values of X and Z with 0<dX(i), dX(j)<1-X-Z allowing interpolation in dX(i), dX(j). A set permits interpolation in X by having 5 of these subsets at the same Z but each with X = 0, 0.03, 0.1, 0.35, and 0.7, respectively. For more details, see "Radiative Opacities for Carbon- and Oxygen-Rich Mixtures," C. A. Iglesias and F. J. Rogers, Astrophys. J. 412, 752 (1993).
The supporting interpolation code for the Type 2 tables is XCOTRIN21.f interpolating in R, T, X, dX(i), and dX(j) at a given Z value. Details of how to use the code are given as comments in the source file.
A set of Fortran subroutines designed to interpolate Type 2 tables in metallicity Z have been developed by Arnold Boothroyd.
The following Type 2 tables are available. In order to interpolate on these tables with XCOTRIN21.f, all FIVE data files for a given file type at fixed Z must be downloaded (and uncompressed if not of the ASCII file type -- note that the ZIP is a single archive library containing all five files).
(Some browsers will simply display the ASCII text version of these tables without prompting you. To save them to your local disk you will need to use a "File | Save As..." command, or "Save Link As..." command from the browser.)
The solar composition used in these tables is that of N. Grevesse and A. Noels (1993), in Origin and Evolution of the Elements, eds. M. Pratzo, E. Vangioni-Flam and M. Casse (Cambridge: Cambridge Univ. Press).
Solar composition, C & O enhanced (Z=0.000 set)
| Z | filename | file type | approx. size |
| 0.000 |
Gz000.* Gz000.*.Z Gz000.zip Gz000.*.gz |
ASCII text COMPRESS binary ZIP binary GZIP binary |
2547 KB (5 files) 740 KB (5 files) 694 KB (1 ZIP library) 691 KB (5 files) |
Solar composition, C & O enhanced (Z=0.001 set)
| Z | filename | file type | approx. size |
| 0.001 |
Gz001.* Gz001.*.Z Gz001.zip Gz001.*.gz |
ASCII text COMPRESS binary ZIP binary GZIP binary |
2543 KB (5 files) 756 KB (5 files) 717 KB (1 ZIP library) 715 KB (5 files) |
Solar composition, C & O enhanced (Z=0.004 set)
| Z | filename | file type | approx. size |
| 0.004 |
Gz004.* Gz004.*.Z Gz004.zip Gz004.*.gz |
ASCII text COMPRESS binary ZIP binary GZIP binary |
2547 KB (5 files) 750 KB (5 files) 705 KB (1 ZIP library) 703 KB (5 files) |
Solar composition, C & O enhanced (Z=0.010 set)
| Z | filename | file type | approx. size |
| 0.010 |
Gz010.* Gz010.*.Z Gz010.zip Gz010.*.gz |
ASCII text COMPRESS binary ZIP binary GZIP binary |
2547 KB (5 files) 750 KB (5 files) 707 KB (1 ZIP library) 704 KB (5 files) |
Solar composition, C & O enhanced (Z=0.020 set)
| Z | filename | file type | approx. size |
| 0.020 |
Gz020.* Gz020.*.Z Gz020.zip Gz020.*.gz |
ASCII text COMPRESS binary ZIP binary GZIP binary |
2528 KB (5 files) 745 KB (5 files) 703 KB (1 ZIP library) 700 KB (5 files) |
Solar composition, C & O enhanced (Z=0.030 set)
| Z | filename | file type | approx. size |
| 0.030 |
Gz030.* Gz030.*.Z Gz030.zip Gz030.*.gz |
ASCII text COMPRESS binary ZIP binary GZIP binary |
2528 KB (5 files) 749 KB (5 files) 703 KB (1 ZIP library) 701 KB (5 files) |
Solar composition, C & O enhanced (Z=0.050 set)
| Z | filename | file type | approx. size |
| 0.050 |
Gz050.* Gz050.*.Z Gz050.zip Gz050.*.gz |
ASCII text COMPRESS binary ZIP binary GZIP binary |
2480 KB (5 files) 737 KB (5 files) 688 KB (1 ZIP library) 686 KB (5 files) |
Solar composition, C & O enhanced (Z=0.100 set)
| Z | filename | file type | approx. size |
| 0.100 |
Gz100.* Gz100.*.Z Gz100.zip Gz100.*.gz |
ASCII text COMPRESS binary ZIP binary GZIP binary |
2367 KB (5 files) 703 KB (5 files) 652 KB (1 ZIP library) 650 KB (5 files) |
For more information about OPAL, contact:
Information date 1999 January 20.
UCRL-MI-130190
