astcosmiccal(1)

estimate cosmological values

Section 1 gnuastro bookworm source

Description

COSMICCALCULATOR

NAME

CosmicCalculator - estimate cosmological values

SYNOPSIS

astcosmiccal [OPTION...]

DESCRIPTION

CosmicCalculator is part of GNU Astronomy Utilities 0.19. 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/cmˆ3).

-C, --criticaldensitynow

Critical density now (g/cmˆ3).

-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 (Mpcˆ3).

-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 © 2015-2022 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