2.1.5. Baryons in Stars and Remnants

With the above numbers the mean mass densities in our three classes of stars and their associated remnants are

	(10)
	(11)
	(12)

in units of the critical density _crit = 2.775 x 10¹¹ h² M Mpc^-3. Here and below the upper (lower) errors are obtained by taking all errors in each step to maximize (minimize) the result. In this sense the error ranges are conservative. The numbers in equations (10)-(12) depend through the M/L calculation on age estimates, and hence depend on the Hubble constant h and other cosmological parameters in a complicated way. If dynamics were used to estimate M/L the estimates of would not depend on h, but in that case h 0.7 would be needed for dynamics to agree with the synthesis calculations. Either way, consistency holds for h 0.7 in a low density universe.