FUNCTION fCosmoZfromLookBackTime

Returns the redshift at a given look back time.

Parameters:

@LookBackTime float: look back time in Gyr.
@OmegaM float: matter density. If set as DEFAULT, then 0.27891507
@OmegaL float: dark energy density. If set as DEFAULT, then 0.721
@OmegaR float: radiation density. If set as DEFAULT, then 8.493e-5
@omega0 float: dark energy state equation. If set as DEFAULT, then -1
@h_0 float: (hubble constant[Km/s/MPc])/(100[Km/s/MPc]). If set as DEFAULT, then 0.701 Reference: http://lambda.gsfc.nasa.gov/product/map/dr3/pub_papers/fiveyear/cosmology/wmap_5yr_cosmo.pdf

returns redshift float
select dbo.fCosmoZfromLookBackTime(1.30147821902424,0.27891507,0.721,8.493e-5,-1,0.701); select dbo.fCosmoZfromLookBackTime(1.30147821902424,DEFAULT,DEFAULT,DEFAULT,DEFAULT,DEFAULT)
return 0.100000000000001 and 0.100000000000001
see also fCosmoZfromAgeOfUniverse,fCosmoLookBackTime

Input and output parameters

name type length inout pnum

float 8 input 0

@LookBackTime float 8 input 1

@OmegaM float 8 input 2

@OmegaL float 8 input 3

@OmegaR float 8 input 4

@omega0 float 8 input 5

@h_0 float 8 input 6

name	type	length	inout	pnum
	float	8	input	0
@LookBackTime	float	8	input	1
@OmegaM	float	8	input	2
@OmegaL	float	8	input	3
@OmegaR	float	8	input	4
@omega0	float	8	input	5
@h_0	float	8	input	6