Orion HST

Cloudy background information

Cloudy

Links to get the version of Cloudy we will use in the workshop are on the homework page.

The main Cloudy web site is http://trac.nublado.org/ It has instructions for how to download the code and its data, and how to build a working executable.

The code lives in a subversion source code control system repository. svn is described here: http://en.wikipedia.org/wiki/Subversion_(software)

You can view the Cloudy repository here:
http://viewvc.nublado.org/index.cgi/?root=cloudy

You can download a copy of Cloudy using svn at the command prompt:
svn checkout svn://svn.nublado.org/cloudy/VersionYouWant

The user's web site is
https://groups.yahoo.com/neo/groups/cloudy_simulations/info
is a place where users can ask questions.

About 200 papers cite Cloudy's documentation each year. There are two main references:

The C13 release is described by Ferland et al. (2013). This link produces a rank-ordered list of the most highly cited ADS papers published in 2013. We are usually around the 20-25th most cited paper on this list, and one of the few theory codes.

Older versions of the code are described in Ferland et al. (1998), and this link produces a rank-ordered list of the most highly cited ADS papers published in 1998. We are often in the top ten.

Other references

Osterbrock & Ferland 2006, Astrophysics of Gaseous Nebulae and Active Galactic Nuclei, 2nd edition (AGN3). This is a graduate text that covers emission lines in nebulae and Active Nuclei.

Ferland 2003, ARA&A, 41, 517, Quantitative Spectroscopy of Photoionized Clouds A review os the status of the field and the outstanding problems.

Hamann & Ferland, ARA&A, 37, 487, Elemental Abundances in Quasistellar Objects: Star Formation and Galactic Nuclear Evolution at High Redshifts. This applies Cloudy to measure abundances from the strong lines seen in Active Nuclei and finds a luminosity - metallicity correlation.

Ferland 2001, PASP, 113, 41, Physical Conditions in the Orion H II Region A review of the current status and problems for this, the brightest and nearest H II region.