PDR code current versions – updated in June 2017

PDR 1.5.2 is the latest public version of the Meudon PDR code, initially released in January 2017. Many physical processes as well as atomic, molecular and chemical data have been updated. The June 2017 version contains updated versions of the ISMTools.

 

PDRLight can be used for demo and teaching. This version of the code is fast but does not contain some important physical processes required for scientific works. A run on a standard laptop requires about 10 minutes. The June 2017 version contains updated versions of the ISMTools.

 

Citation: If you publish results produced by the Meudon PDR code, for statistic reasons, we would appreciate if you could mention it in your publications. A typical sentence could be:
PDR models published in this paper have been produced with the Meudon PDR code (Le Petit et al. 2006, http://ism.obspm.fr).

Major changes

All the physics of the previous versions of the PDR code are included in PDR 1.5.2 and PDRLight.

Note on surface processes: these two versions of the PDR code include H2 formation by Langmuir-Hinshelwood and Eley-Rideal mechanisms (Le Bourlot et al. 2012). They do not include neither full surface chemistry nor stochastic processes (Bron et al. 2014, 2016). These versions will be released later in 2017. If you need these versions, please contact us.

The output files of the Meudon PDR code are now in HDF5 format and should be read with the dedicated tools: Extractor and Chemistry analyser included in the source code archive.

Version Access Note
PDR 1.5.2
rev 1787
(June 2017)
Download
  • Improvement of the computing time and stability
  • Radiative transfer includes absorption in the continuum by several gas species
  • A PAH component can be added to the grain distribution
  • Can be run synchronously with DustEM 4.0
  • New cooling processes have been added for hot gas
  • UV pumping and chemical excitation of CO can be considered
  • Better integration of the CMB in the radiative pumping
  • OH + photon produces electronic excited O
  • Update of several hundred chemical rection rates
  • New formation rate of CH+ from C+ + excited H2
  • Default chemical network includes 13C and 18O chemistry (and minimal D chemistry)
  • Chemistry and emission of doubly ionized species added
  • Line intensity computations for H3+, OH+, SH+, CH+ added
  • Update of radiative and dielectronic recombination rates
  • Update of many atomic and molecular data
  • Update of Analysis tools (June 2017)
PDRLight 1.0
rev 1829
(June 2017)
Download PDRLight includes all upgrades of PDR 1.5.2 with the following restrictions:

  • No continuous absorption by gas species
  • Constant dust properties throughout the cloud (allowing analytical integration of some equations)
  • No coupling with DustEM
  • Update of Analysis tools (June 2017)

PDRLight runs require about 10 minutes on a standard laptop. It can be used for demo or teaching sessions.

Archives

These versions of the PDR code are no more maintained. The current PDR code version includes all the physics of these old versions.

Version Access Major updates
PDR 1.5.2
rev 1787
(Jan. 2017)
Download
  • Improvement of the computing time and stability
  • Radiative transfer includes absorption in the continuum by several gas species
  • A PAH component can be added to the grain distribution
  • Can be run synchronously with DustEM 4.0
  • New cooling processes have been added for hot gas
  • UV pumping and chemical excitation of CO can be considered
  • Better integration of the CMB in the radiative pumping
  • OH + photon produces electronic excited O
  • Update of several hundred chemical rection rates
  • New formation rate of CH+ from C+ + excited H2
  • Default chemical network includes 13C and 18O chemistry (and minimal D chemistry)
  • Chemistry and emission of doubly ionized species added
  • Line intensity computations for H3+, OH+, SH+, CH+ added
  • Update of radiative and dielectronic recombination rates
  • Update of many atomic and molecular data
PDRLight 1.0
rev 1786
(Jan. 2017)
Download PDRLight includes all upgrades of PDR 1.5.2 with the following restrictions:

  • No continuous absorption by gas species
  • Constant dust properties throughout the cloud (allowing analytical integration of some equations)
  • No coupling with DustEM

PDRLight runs require about 10 minutes on a standard laptop. It can be used for demo or teaching sessions.

1.4.4
(2012)
Download
  • Include a version of DustEM
  • Improve pumping by external radiation field
  • Langmuir-Hinshelwood and Eley Rideal mechanisms
  • New excitation collision rates for O
  • Computation of O2, OH, and CH+ emission
  • Post-treatment to model a pseudo-spherical cloud
  • Update of chemistry files
1.4.1
(2010)
Download
  • Improve treatment of grains absorption
1.4
(2009)
Download
  • Improve radiative transfer in I.R. and sub-millimeter
  • Computation of H2O excitation
  • Graphical interfaces
  • Virtual Observatory integration
5II07
(2007)
Download
  • Possibility to illuminate the slab on two sides
  • Photo-ionization & dissociation computed with cross sections
23X06
(2006)
Download
  • Third public version of the PDR code
03II06
(2006)
Download
  • Second public version of the PDR code
250105
(2005)
Download
  • First public version of the PDR code