Quick Guide To H Dependence In Cosmology (tables Page)

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Quick guide to h dependence in cosmology (tables page)

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From values using h-units to assuming h=0.7:

Value with h dependence Value assuming h=0.7
line-of-sight distance, and transverse distance from distance times angular separation 1.00 h-1 Mpc 1.43 Mpc
volume from distance cubed 1.00 h-3 Mpc3 2.92 Mpc3
luminosity that is proportional to distance squared 1.00 h-2 L☉ 2.04 L☉
number density of galaxies from inverse volume 1.00 h3 Mpc-3 0.343 Mpc-3
luminosity density from combining previous two 1.00 h L☉ Mpc-3 0.70 L☉ Mpc-3
absolute magnitude from -2.5 log luminosity -20.00 + 5 log h -20.77
mass from scaled luminosity 1.00 h-2 M☉ 2.04 M☉
mass from velocity squared times transverse distance 1.00 h-1 M☉ 1.43 M☉

From values assuming h=0.7 to using h-units:

Value assuming h=0.7 Value with h dependence
line-of-sight distance, and transverse distance from distance times angular separation 1.00 Mpc 0.70 h-1 Mpc
volume from distance cubed 1.00 Mpc3 0.343 h-3 Mpc3
luminosity that is proportional to distance squared 1.00 L☉ 0.49 h-2 L☉
number density of galaxies from inverse volume 1.00 Mpc-3 2.92 h3 Mpc-3
luminosity density from combining previous two 1.00 L☉ Mpc-3 1.43 h L☉ Mpc-3
absolute magnitude from -2.5 log luminosity -20.00 -19.23 + 5 log h
mass from scaled luminosity 1.00 M☉ 0.49 h-2 M☉
mass from velocity squared times transverse distance 1.00 M☉ 0.70 h-1 M☉

Written by Ivan Baldry, 2015 December.

Links: - return to my home page; return to my research page.

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