WSU Low Temperature Opacities

 

This page is a repository of opacity data based from the WSU opacity group, Prof. Ferguson et al.  Each set consists of a tar/gzip'd file that includes the tables of Rosseland Mean Opacity for that set.  The individual filenames include information about the various compositions, such as X = 0.7 and Z = 0.02 where X + Y + Z = 1.0.  There are either 126 or 155 compositions (depending when tables were made) for each base composition.

In addition the abundances for the basic set for each composition is given.  Depending on the composition source, the abundances are given in either log10 (n_H) = 12.0 units or number fractions.

F05 Opacities

Low Temperature Stellar Opacities based on Ferguson et al. 2005 (“Low Temperature Opacities”, Jason W. Ferguson, David R. Alexander, France Allard, Travis Barman, Julia G. Bodnarik, Peter H. Hauschildt, Amanda Heffner-Wong, Akemi Tamanai 2005, Astrophysical Journal, 623, 585.)

Grevesse et al. 1993

Opac

Abun

Seaton et al. 1992

Opac

Abun

Grevesse & Sauval 1998

Opac

Abun

Grevesse & Sauval 1998 no grains

Opac

Abun

Grevesse & Sauval 1998 Planck Mean opacities

Opac

Abun

Lodders et al. 2003

Opac

Abun

Asplund et al. 2004

Opac

Abun

Cunha et al. 2006

Opac

Abun

Asplund et al. 2009

Opac

Abun

Caffau et al. 2011

Opac

Abun

Alpha-enhanced opacities based on the Asplund et. al 2009 base abundances.

Methods discussed in Weiss & Ferguson 2009, A&A, 508, 1343 and used by Wagstaff & Weiss 2018, MNRAS, 477, 4824.

A09 [alpha/Fe] = -0.2 

Opac

Abun

A09 [alpha/Fe] = -0.1 

Opac

Abun

A09 [alpha/Fe] = +0.1 

Opac

Abun

A09 [alpha/Fe] = +0.2 

Opac

Abun

A09 [alpha/Fe] = +0.3  Opac Abun
A09 [alpha/Fe] = +0.4  Opac Abun
A09 [alpha/Fe] = +0.5  Opac Abun
A09 [alpha/Fe] = +0.6  Opac Abun

 Older AF94 opacities

Low Temperature Stellar Opacities based on Alexander & Ferguson 1994 (“Low Temperature Rosseland Opacities”, David R. Alexander & Jason W. Ferguson 1994, Astrophysical Journal, 437, 879.)

Grevesse et al. 1993

Opac

Abun

Seaton et al. 1992

Opac

Abun

Seaton et al. 1992 alpha enhanced

Opac

Not available