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Small updates from Yannick's development branch

Yannick Bahé requested to merge yb-small-updates into master

This merge request includes a number of relatively minor updates that had accumulated in my development branch. Not all of them may be useful, but feel free to merge in what looks interesting.

Apart from some minor comment edits and additional output fields for BHs and stars, some slightly less trivial changes include:

  • The more complex BH reposition speed criterion that is based on both BH mass and ambient gas density
  • An option to use a pure "constant-alpha" model in the Booth & Schaye (2009) accretion boost, with alpha < 1 also allowed (one extra parameter if with_boost_factor == 1)
  • Added option to use the constant AGN dT as reference value for converting "n_heat" to an energy reservoir threshold (one extra parameter)
  • Added option to use an adaptive energy reservoir threshold, scaling with BH accretion rate (one extra parameter)
  • Updated the combine_ics.py code to cope with ICs including type-3 boundary particles
  • Two separate switches for birth/instantaneous properties in f_th for density and metallicity (two new parameters)

The (development) version of the variable SN-dT model will follow in a separate merge request.

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