Welcome to the Cloudy home page!

Cloudy is a spectral synthesis code designed to simulate conditions in interstellar matter under a broad range of conditions.

Please post question or problems on the Cloudy  discussion board. Updates to Cloudy will be announced on that board.

C13.03, the current Cloudy release, is available.  This paper discusses what is new. Follow the StepByStep instructions for downloading and installing the code, or go straight to the DownloadLinks page to obtain it. NewC13 explains improvements and changes.

Cloudy  Workshop 2015

Registration for the Cloudy workshop to be held at the  Copernicus Astronomical Center, Warsaw 2015 May 4 to 8, and for the workshop at Queen's University Belfast, 2015 January 12 - 16, is closed. The school web site is  here.

Getting started with Cloudy

StepByStep instructions for downloading and installing the release version, and running the code on various platforms.

Or you can go straight to the DownloadLinks page.

StellarAtmospheres in Cloudy are now very flexible. They are described on this web site rather than in Hazy.

KnownProblems are described on this page.

HotFixes are small corrections to the source that fix problems discovered after the current stable version was released.

The RevisionHistory pages list changes and new features in past, current and the next versions.

The ReleaseNotes page gives more information about running different versions.

Frequently asked questions are on the FaqPage

More information about Cloudy

Old versions of Cloudy are on the CloudyOld page

The DownloadLinks page gives links to download the current version of the code, and trial versions if they exist.

The RoadMap page outlines planned future development

Acknowledgments for help with Cloudy are on the AcknowledgmentsPage

Outside pages related to Cloudy or related physics

ContributedMaterial - codes and spectra contributed by others.

A list of typos in AGN3 is posted  here. (updated 2007 July 19)

A very old page giving  miscellaneous information, including the following: people involved in its development, the code's history and style convention, computing at Cambridge in the 1970's, what the version numbers mean, the distinction between notation such as C+2 vs C III, how to call C from Fortran. Software contributed to drive Cloudy, other spectral synthesis codes, development software, atomic data, Kentucky, meetings on spectroscopy, and a collection of cloud images from across the internet.

ScriptsForUsers

These are donated scripts that help use Cloudy more efficiently. Do you have a useful script? If so please send a link to a page describing it to the Cloudy  discussion board.

DeveloperPages

Meta wiki

Discussion about the wiki, trac, etc is at MetaWiki

For a complete list of local wiki pages, see TitleIndex.

The trac page on  wiki formatting


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