PDR code current version – updated August 18th 2021
PDR 1.5.4 is the latest public version of the Meudon PDR code.
It was first released in March 2020. This version is the August 18th 2021 version that contains
small updates. Many physical processes as well as atomic, molecular and chemical data have
been updated. The code is also more robust in many astrophysical conditions. This version of
the code comes with the new ISMTools:
IDAT
and
Chemistry Analyser.
Citation: If you publish results produced by the Meudon PDR code, we would appreciate if you
could mention it in your publications, in order for us to keep track of usage statistics for the
code. 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 is included in PDR 1.5.4.
Note on surface processes: PDR 1.5.4 includes H2 formation by Langmuir-Hinshelwood and
Eley-Rideal mechanisms (Le Bourlot et al. 2012). It does not include the stochastic formalism
presented in Bron et al. 2014 and Bron et al.
2016. It includes surface chemistry for other species with rate equation formalism but we do
not provide chemical networks including such reactions. This will come later this year. If you need
help for surface chemistry or if you would like to use the stochastic formalism, please contact us.
The output files of the Meudon PDR code are now in HDF5 format and should be read with the
dedicated tools: IDAT and Chemistry Analyser
included in the source code
package.
Starting with PDR 1.5.4, each PDR release includes a fully functional IDAT release in the AnalysysTools.
This is the recommended version to use to analyze the hdf5 files produced by the PDR release.
| Version |
Access |
Note |
PDR 7 beta
Berné et al. (2024) |
Download
|
- Intermediate version used in Berné et al., 2024, Science.
|
PDR 1.5.4
ver 2095
(Aug 2021) |
Download
|
- PDR code is more robust when users impose steep density gradient profiles in .pfl files
- correct an issue with the pumping by the CMB
- correct an issue with H2 cascade coefficients
- better compatibility with Intel ifort compiler
- new IDAT (2.1.4) that is compatible with more python versions and can read HDF5 files produced by different versions of the PDR code
- small update of the Chemistry Analyser
|
PDR 1.5.4
ver 2083
(Feb 2021) |
Download
|
- PDR code and IDAT are compatible with recent versions of numpy and h5py
- correct an issue with OH photodissociation rate
- minor bug corrections
|
PDR 1.5.4
ver 2065
(June 2020) |
Download
|
- fixes a bug preventing the use of IDAT in command line
|
PDR 1.5.4
ver 2061
(May 2020) |
Download
|
- Allow to use Draine’s grain data and non standard metallicity
- Optimization of HDF5 files writing
|
PDR 1.5.4
ver 2048
(March 2020) |
Download
|
- New processes and updates of molecular data
- Line intensities computation of H2_18O
- Implementation of different prescriptions for H2 collisional dissociations
- New default H2 collisional dissociation:
Glover & Mac Low 2007)
- Update some UV cross sections (
Heays et al. 2017)
- Update photo-reaction rates (
Heays et al. 2017)
- Update oxygen collision rates ( Lique
et al. 2018 )
- Update H2O collision rates (
Daniel et al. 2015 )
- Formation of SH+ using H2 internal energy (
Zanchet et al. 2019)
- 18O fractionation reactions following
Loison et al. (2019)
- The isotopologues chemistry has been globally expanded
- Many other updates in the chemical networks and reaction rates following
literature and KIDA database
- Update of many molecular data
- Better compatibility of the PDR code with DustEM
- Improvement of robustness and computing time
- Re-design of thermal balance and charge conservation to improve the robustness
of the code
- Reduction of the global computation time
- Change in some filenames for windows OS compatibility
- Switch from python 2.7 to python 3.6
- Improvement of output files and analysis tools
- Compatibility of HDF5 output files with IDAT, the new tool to extract and plot
computed quantities
- Clarifications of definitions of quantities associated to line profiles
- Switch from python 2.7 to python 3.6 for the analysis tools
- The extractor tool is replaced by IDAT and and is not maintained anymore
|
Documentation
Requirements
- Fortran 90 with lapack and bias libraries
- Python 3.6 with numpy and h5py
Contact
For any question about the PDR code:
- support.pdr.ism at obspm.fr
References
- Le Petit et al.,
2006, ApJS, 164, 506
- Goicoechea et
al., 2007, A&A, 467, 1
- Gonzalez Garcia
et al., 2008, A&A, 485, 127
- Le Bourlot et
al., 2012, A&A, 541, 76
- Bron E., 2014, Thesis
- Bron et
al., 2014, A&A, 569, 100
- Bron et
al., 2016, A&A, 588, 27
Archives
These versions of the PDR code are not maintained anymore. The current PDR code version includes all
the physics of these old versions.
| Version |
Access |
Major updates |
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.
|
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
|
Requirements (all versions)
- Fortran 90 with lapack and blas libraries
Specific requirements (vers. 1.5.2)
- Python 3.6 with numpy, h5py and PyQt4
Specific requirements (vers. 1.4.x)
- cfitsio library (optional)
- java 1.5 (optional)
