Documentation of the IDL functions calc_dm.pro, calc_vol.pro, calc_t.pro and calc_scale.pro

Markus Wetzstein

August 21, 1998

e-mail: MPWetzstein@lbl.gov, or mwetzste@ix.urz.uni-heidelberg.de

Abstract:

This documentation provides information for the usage of the IDL functions calc_dm.pro, calc_vol.pro, calc_t.pro and calc_scale.pro. These functions may be used within IDL to calculate the distance modulus, comoving volume element, lookback time and scale factor (respectively) from a given redshift z and a set of parameters $\Omega_M$, $\Omega_\Lambda$, H₀ and w.
It also provides information about the example files distplots.pro, volplots.pro, timeplots.pro, scaleplots.pro and scaleplot_z.pro.
The functions serve as interface to library routines written in C which perform the actual numerical calculations.