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AMIGA's-Halo-Finder:
Adaptive Mesh Investigations of Galaxy Assembly
The code manual and papers can be found on http://popia.ft.uam.es/AHF/download.html
===============
developed by
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Andrew Green (1993-2001)
James Binney (1993-2001)
Stuart Gill (2001-2005)
Steffen Knollmann (2006-2012)
Doug Rennehan (2018, GIZMO libio)
Isaac Alonso (2022, Pkdgrav libio)
Andrea Negri (2023, git repo)
Alexander Knebe (continuously)
==========
content
==========
analysis/ tools that may serve the purpose of extracting scientific data from AHF catalogues
convert/ conversion between various data formats
src/ the AHF source directory
tools/ some things that you may consider useful...
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detailed content
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analysis/
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IDL/ just some sample code how to possibly work with the AHF_halos files
MergerTree.c constructs merger trees using AHF_particles files
ahfFindCrossPairs.c cross correlates two different AHF_halos catalogues
ahfFindHalo.c seraches for a specific halo in AHF_halos
ahfFindHaloPairs.c cross correlates a AHF_halos catalogue with itself, i.e. searches for dublicates
ahfHaloHistory.c based upon the output of MergerTree.c tracks one specific halo through all AHF_halos catalogues
ahfSubCheck.f searches for all subhaloes of a given halo in one AHF_halos file
ahfXi.f calculates the 2-point correlation function given a AHF_halos catalogue
simuPdens.c calculates the density at each particle position
simuPk.c calculates P(k) for a given simulation file
simuSigmaR.c calcluates sigma(r) for a simulation file
simuVstat.c some velocity statistics for simulation file
simuXi.f calculates the 2-point correlation function given a simulation file
NOTE: all the simuXYZ codes are making use of libio_serial.a and hence have to compiled like that!
convert/
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Hdf2GADGET/ converter from GADGET-HDF5 to GADGET-2 format (courtesy Ofer Metuki)
tostd/ converter from PKDGRAV-HDF5 to TIPSY format (courtesy Doug Potter)
ramses2gadget.f converter from RAMSES to GADGET-2 format (incl. generation of gas particles!) courtesy Timur Doumler
ahf2binary.c converts either AHF_halos or AHF_particles ASCII file into a binary format file
halos2geom.c converts AHF_halos file into something to be used with stereo2 (http://paulbourke.net/miscellaneous/stereographics/stereo2/)
src/
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the beautiful and marvelous AHF source code...
tools/
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HaloPotential.c based upon particle positions this tool calculates the potential for a given halo
HaloShape.c based upon particle positions this tool calculates the shape of a given halo
RemoveUnbound.c based upon particle positions and velocities unbound particles are removed from a given halo
age.c given the cosmology and redshift the age of the Universe is calculated
ahfCalcMinStar.c given an AHF analysis and a GADGET simulation it calculates the stellar mass for a provided list of halos
ahfExtractHalosPdens.c extracts halo particles from a simuPdens.c output file
ahfExtractMhalo.c calculates M_dm, M_gas, and M_star for each halo using a given AHF_particles file
ahfSortHalos.c sorts a given AHF_halos catalogue by some user specified column (using command line 'sort' may be faster!)
cosmology.c for a given cosmology it dumps a file Cosmology.DAT containing all you ever wanted to know as a function of t, a, and z
pmass.c tool to calculate the mass of a single particle in a certain simulation
simuExtractHalos.c extract the particles of a given halo from the simulation snapshot
virial.c calculates the virial overdensity threshold based upon spherical top-hat collapse model