ProDiMo v3.0.0  3.1.2024

This second official ProDiMo release v3.0.0 is out.

new default features

New physical / chemical code improvements have been developed, and some of the already existing options have been activated by default, which are likely to change results for older models. For backward compatibility, they can be switched off again.

  • new escape probability: takes into account continuum emission/absorption effects in the line emission regions, leading to both increased escape and pumping probabilities.  As a consequence, gas and dust are now energetically more tightly coupled by the exchange of line photons in the midplane, which turns out to be more efficient than thermal accommodation. The new escape probabilities are now also applied to the line-flux estimations and determinations of the line emitting regions, details in Woitke+2023 (ADS)

  • new setup for UV photorates and molecular shielding: introducing a better way to deal with the 2D geometry of direct and scattered UV irradiation for the computation of photorates and molecular shielding factors. A number of improvements have been made, including the activation or several mutual and self-shielding factors from the literature, details in Woitke+2023(ADS)

  • improved reaction network:  The default reaction network is now read from data/ChemicalNetwork/UMIST2012_Meisner.dat and data/ChemicalNetwork/Reactions.in.csv.  UMIST2012_Meisner.dat includes low-T rates with tunneling for a few important reactions (ADS).  Reactions.in.csv includes additional rates from KIDA for larger hydrocarbon molecules (ADS).  A number of additional fixes and additions have been made.

  • updated H2-formation rate on grain surfaces: now by default latest edition Cazaux+2010 (ADS)
  • HITRAN 2020: now by default selected as the source for the line lists of the LTE-molecules like CO2, HCN, and C2H2.  Improved default line selection criteria implemented to extend the line lists down to 4.5 micron.
  • large CO ro-vibronic model molecule: from Thi+2013 (ADS) activated by default
  • new non-LTE ro-vibrational OH model molecule
  • new photo-dissociation heating rate: explained in Woitke+2023 (ADS)
  • improved code speed and stability:  ProDiMo now uses by default the option to have electrons as additional species, use the quadruple precision chemistry solver if necessary, and a better scaling of the chemical rate equations.

 

new features (optional)

  • new options for consistent molecular shielding:  Users can now use the Leiden molecular shielding factors (link) and/or can use the high-resolution Leiden photo-cross-sections from the Leiden photodissociation and photoionisation database to calculated these shielding factors on the fly, including all combinations of mutual and self-shielding effects. Yet unpublished.

  • new options for having an increasing surface density at the inner rim and subsequent disk zones:  explained in Woitke+2023 (ADS)