Another Look at Gaussian Isocurvature Hot Dark Matter Models For Large- Scale Structure

Details Another Look at Gaussian Isocurvature Hot Dark Matter Models For Large- Scale Structure Another Look at Gaussian Isocurvature Hot Dark Matter Models For Large- Scale Structure

1995-09-14

arxiv.org/abs/astro-ph/9509075v1

Astrophys.J. 464 (1996) 539

Astronomy and Astrophysics

Astrophysics

29 pps. compressed postscritp; figures included

Scientific paper

10.1086/177344

We examine Gaussian isocurvature hot dark matter (massive neutrino) models for large-scale structure in which the initial density perturbations are produced in the baryons with a power--law spectrum $P_B(k) = Ak^{n_B}$. We calculate the linearly-evolved power spectrum and cosmic microwave fluctuations. We find that models with only isocurvature perturbations are inconsistent with observations of damped Ly$\alpha$ systems and COBE constraints on the power index. However, models which contain a mixture of adiabatic and isocurvature perturbations can be made consistent with COBE, galaxy surveys and damped Ly$\alpha$ systems.Isocurvature hot dark matter models also produce a bias between baryons and neutrinos even in the linear regime. We find that this ``natural bias'' can increase the baryon fraction in small scale objects like damped Ly$\alpha$ systems, but it has no effect on cluster scales.

Affiliated with

Also associated with

No associations

Rating

Another Look at Gaussian Isocurvature Hot Dark Matter Models For Large- Scale Structure does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Another Look at Gaussian Isocurvature Hot Dark Matter Models For Large- Scale Structure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Another Look at Gaussian Isocurvature Hot Dark Matter Models For Large- Scale Structure will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-158454