Cosmological constraints on neutrino plus axion hot dark matter

Details Cosmological constraints on neutrino plus axion hot dark matter Cosmological constraints on neutrino plus axion hot dark matter

2007-06-28

arxiv.org/abs/0706.4198v1

JCAP 0708:015,2007

Astronomy and Astrophysics

Astrophysics

13 pages, 2 figures, uses iopart.cls

Scientific paper

10.1088/1475-7516/2007/08/015

We use observations of the cosmological large-scale structure to derive limits on two-component hot dark matter consisting of mass-degenerate neutrinos and hadronic axions, both components having velocity dispersions corresponding to their respective decoupling temperatures. We restrict the data samples to the safely linear regime, in particular excluding the Lyman-alpha forest. Using standard Bayesian inference techniques we derive credible regions in the two-parameter space of m_a and sum(m_nu). Marginalising over sum(m_nu) provides m_a < 1.2 eV (95% C.L.). In the absence of axions the same data and methods give sum(m_nu) < 0.65 eV (95% C.L.). We also derive limits on m_a for a range of axion-pion couplings up to one order of magnitude larger or smaller than the hadronic value.

Affiliated with

Also associated with

No associations

Rating

Cosmological constraints on neutrino plus axion hot dark matter 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 Cosmological constraints on neutrino plus axion hot dark matter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cosmological constraints on neutrino plus axion hot dark matter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-456511