NAME

       CosmicCalculator - estimate cosmological values

SYNOPSIS

       astcosmiccal [OPTION...]

DESCRIPTION

       CosmicCalculator  is  part  of  GNU  Astronomy  Utilities  0.16.  CosmicCalculator will do
       cosmological calculations. If no redshfit is specified, it will only print the main  input
       parameters. If only a redshift is given, it will print a table of all calculations. If any
       of the single row calculations are requested, only their values will  be  printed  with  a
       single space between each.

       For  more  information, please run any of the following commands. In particular the second
       contains a very  comprehensive  explanation  of  CosmicCalculator's  invocation:  expected
       input(s), output(s), and a full description of all the options.

       All options and their values:
              $ astcosmiccal -P

       Inputs/Outputs and options:
              $ info astcosmiccal

       Full section in manual/book:
              $ info CosmicCalculator

       Full Gnuastro manual/book:
              $ info gnuastro

       If  you  couldn't find your answer in the manual, you can get direct help from experienced
       Gnuastro users and developers. For more information, please run:

              $ info help-gnuastro

       CosmicCalculator options:

              Input:

       -H, --H0=FLT
              Current expansion rate (Hubble constant).

       -l, --olambda=FLT
              Current cosmological cst. dens. per crit. dens.

       -m, --omatter=FLT
              Current matter density per critical density.

       -O, --obsline=STR,FLT
              Redshift from line and observed wavelength.

       -r, --oradiation=FLT
              Current radiation density per critical density.

       -y, --velocity=FLT
              Velocity of interest in km/s.

       -z, --redshift=FLT
              Redshift of interest.

              Basic cosmology calculations

       -a, --absmagconv
              Conversion to absolute magnitude (no unit).

       -A, --angulardimdist
              Angular diameter distance (Mpc).

       -b, --lookbacktime
              Look back time to z (Ga: Giga Annum).

       -c, --criticaldensity
              Critical density at z (g/cm^3).

       -C, --criticaldensitynow
              Critical density now (g/cm^3).

       -d, --properdistance
              Proper distance to z (Mpc).

       -e, --usedredshift
              Used redshift in this run.

       -g, --age
              Age of universe at z (Ga: Giga Annum).

       -G, --agenow
              Age of universe now (Ga: Giga Annum).

       -L, --luminositydist
              Luminosity distance to z (Mpc).

       -s, --arcsectandist
              Tangential dist. covered by 1arcsec at z (kpc).

       -u, --distancemodulus
              Distance modulus at z (no units).

       -v, --volume
              Comoving volume (4pi str) to z (Mpc^3).

       -Y, --usedvelocity
              Used velocity (in km/s) for this run.

              Spectral lines

       -i, --lineatz=STR/FLT
              Wavelength of line (name or wavelength) at z.

       --listlines
              List known lines and rest frame wavelength.

       --listlinesatz
              List known spectral lines at given redshift.

              Operating modes:

       -?, --help
              give this help list

       --checkconfig
              List all config files and variables read.

       --cite BibTeX citation for this program.

       --config=STR
              Read configuration file STR immediately.

       --lastconfig
              Do not parse any more configuration files.

       --minmapsize=INT
              Min. bytes to avoid RAM automatically.

       --onlyversion=STR
              Only run if the program version is STR.

       -P, --printparams
              Print parameter values to be used and abort.

       --quietmmap
              Don't print mmap'd file's name and size.

       -S, --setdirconf
              Set default values for this directory and abort.

       --usage
              give a short usage message

       -U, --setusrconf
              Set default values for this user and abort.

       -V, --version
              print program version

       Mandatory or optional arguments to long options are also mandatory  or  optional  for  any
       corresponding short options.

       GNU Astronomy Utilities home page: http://www.gnu.org/software/gnuastro/

REPORTING BUGS

       Report bugs to bug-gnuastro@gnu.org.

COPYRIGHT

       Copyright  © 2015-2021, Free Software Foundation, Inc.  License GPLv3+: GNU General public
       license version 3 or later.
       This is free software: you are free to change and redistribute it.  There is NO  WARRANTY,
       to the extent permitted by law.

       Written/developed by Mohammad Akhlaghi

SEE ALSO

       The  full  documentation  for  CosmicCalculator is maintained as a Texinfo manual.  If the
       info and CosmicCalculator programs are properly installed at your site, the command

              info CosmicCalculator

       should give you access to the complete manual.