astcosmiccal1

Usage

Overview

CosmicCalculator is part of GNU Astronomy Utilities 0.23. 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.

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, --angulardiamdist

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. for 1arcsec at z (physical 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.

--lineunit=STR

Unit ('angstrom', 'nm', 'microm' or 'm').

--listlines

List pre-defined lines at rest frame.

--listlinesatz

List pre-defined lines at the 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.

--config-prefix=STR

Custom prefix of option names config files.

--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/