If the quantum fluctuations imprinted on the dark matter halos at the time of the formation of the CMB were ten times larger and the Hubble Constant was the same as it is now, galaxies would likely be:
A) smaller than they are now
B) larger than they are now
C) more numerous than they are now
D) nonexistent
E) exactly the same as they are now

Question

Quizplus · Accepted Answer

Larger quantum fluctuations would lead to larger initial density perturbations, resulting in more massive dark matter halos and thus larger galaxies.

If the Quantum Fluctuations Imprinted on the Dark Matter Halos