Version 283 (modified by peter, 19 months ago) (diff)

Removed comment characters other than '#' and '##'

New in Next Release

This page summarizes all major changes and improvements to Cloudy that will be included in the next release. You may also view the HotFixes and KnownProblems pages, or return to the main RevisionHistory page.


The code has been ported to C++11. This implies that you need a compiler with full support for C++11. For g++ that means version 4.8.1 or later, for LLVM/clang++ version 3.3 or later, for the Intel compiler version 15.0 or later, and for the Oracle Studio compiler version 12.5 or later.

Parser changes

In c17.01 using comment characters other than '#' and '##' was deprecated. These have now been removed.

New commands or options

The atomic and molecular database

The molecular hydrogen level energies, which we use to derive line wavelengths, have been updated to Komasa (2011). This results in ~1 wavenumber changes in level energies.

We now use the Lique 2015 H - H2 collisional data by default. Compared with previous calculations, these data extend to higher vibrational manifolds and include ortho-para changing reactive collisions. Tests show that the 2.121 micron line intensity changes by roughly 50%, becoming stronger in some PDR sims.

Fe III collision strengths are updated to Badnell and Balance 2014. We had previously used data from Zhang 1996. Tests show that the total Fe III cooling increases by nearly 50%.

Improved physics and numerical methods

Other changes

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