Abstract
We provide a covariant and gauge-invariant approach to the question ofhow a first-order pressure can be incorporated self-consistently in acosmological scenario. The approximation is relevant, in the linearregime, to weakly self-interacting or warm dark matter models. We alsoderive number density fluctuations in which new modes appear becausethe number density fluctuations are no longer simply proportional to thedensity fluctuations.
Full Text 
Sign-in/Register to access full text options
Sign-in/Register to access full text options 
Published version (
Free)
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
