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snapgadget [parameter=value]
snapgadget converts data from
standard snapshot(5NEMO)
format into gadget(lNEMO)
.
Although gadget(lNEMO)
has several flavors of particles (halo, disk, bulge, stars, gas), this
version can only handle a limited set due to current limitations in the
way snapshot’s are handled.
Some programs (e.g. AHF) that need proper cosmological
information in a gadget header, will need these explicitly passed via a
set of parameters (see below).
The following parameters are recognized
in any order if the keyword is also given:
- in=
- Input file (snapshot format).
No default.
- out=
- Output file (gadget format). Each snapshot is placed in
its own file, and "%t" is replaced with the time of the snapshot (useful
for times=all). No default.
- N=Nhalo,Ndisk,Nbulge,Nstars
- Nhalo,Ndisk,Nbulge,Nstars
needs to be specified for the sub-components as GADGET wants them. Note the
current version does not handle gas particles. No default.
- M=Mhalo,Mdisk,Mbulge,Mstars
- The masses (per particle) of each of the components listed in the N= keyword.
You only need this if no masses are present. Note in this mode it is not
possible to have different masses per component. Default: not used.
- times=
- Times of the snapshots to select for output. Default: all
- swap=
- Force swaping
bytes for other-endian machines [f] z= Current Redshift [0]
- box=
- Box
size (Mpc/h) [128]
- omega0=
- Omega_0 [1]
- lambda=
- OmegaLambda [1]
- h=
- HubbleParam [0.75]
There is an option to run gadget in
double precision mode, their output files may not be compatible with this
version of the program.
gadgetsnap(1NEMO)
, nemo2gadget(1NEMO)
, gadget2nemo(1NEMO)
,
uns2uns(1NEMO)
, snapshot(5NEMO)
http://www.mpa-garching.mpg.de/gadget/
Jeremy
Bailin
8-sep-03 V0.1 Created J.Bailin
8-sep-03 V0.2 minor mods on order of arguments, fix missing %t case PJT
21-jun-11 V1.0 add some reasonable cosmo defaults, in case they’re needed PJT
22-jun-11 V1.1 add M=
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