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Re: Plotting lookback time (in Gyrs) and redshift on two x axis in IDL [message #89795 is a reply to message #89793]

Wed, 03 December 2014 13:56

johndraper1993
Messages: 3
Registered: December 2014

Junior Member

I understand that i can make one axis logarithmic in scale but i don't think this helps me as redshift isn't logarithmic with respect to lookback time (res).

I have worked out what redshift is with respect to lookback time in Gyrs:

z=(sqrt((1.-omega_m)/omega_m)/sin(res*3*h*sqrt((1.-omega_m)/ (2*9.777505969))))

Do you know if there is there anyway i can set the top axis to have this scaling within some set of values?

please say if i haven't made it clear

Thanks, John

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[Message index]

		Plotting lookback time (in Gyrs) and redshift on two x axis in IDL By: johndraper1993 on Wed, 03 December 2014 03:47
		Re: Plotting lookback time (in Gyrs) and redshift on two x axis in IDL By: rryan%stsci.edu on Wed, 03 December 2014 12:12
		Re: Plotting lookback time (in Gyrs) and redshift on two x axis in IDL By: johndraper1993 on Wed, 03 December 2014 13:56
		Re: Plotting lookback time (in Gyrs) and redshift on two x axis in IDL By: rryan%stsci.edu on Thu, 04 December 2014 12:40

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