CAMB: Code for Anisotropies in the Microwave Background

Details CAMB: Code for Anisotropies in the Microwave Background CAMB: Code for Anisotropies in the Microwave Background

Feb 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ascl.soft02026l&link_type=abstract

Astrophysics Source Code Library, record ascl:1102.026

Astronomy and Astrophysics

Astrophysics

Scientific paper

We present a fully covariant and gauge-invariant calculation of the evolution of anisotropies in the cosmic microwave background (CMB) radiation. We use the physically appealing covariant approach to cosmological perturbations, which ensures that all variables are gauge-invariant and have a clear physical interpretation. We derive the complete set of frame-independent, linearised equations describing the (Boltzmann) evolution of anisotropy and inhomogeneity in an almost Friedmann-Robertson-Walker (FRW) cold dark matter (CDM) universe. These equations include the contributions of scalar, vector and tensor modes in a unified manner. Frame-independent equations for scalar and tensor perturbations, which are valid for any value of the background curvature, are obtained straightforwardly from the complete set of equations. We discuss the scalar equations in detail, including the integral solution and relation with the line of sight approach, analytic solutions in the early radiation dominated era, and the numerical solution in the standard CDM model. Our results confirm those obtained by other groups, who have worked carefully with non-covariant methods in specific gauges, but are derived here in a completely transparent fashion.

Affiliated with

Also associated with

No associations

Rating

CAMB: Code for Anisotropies in the Microwave Background 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 CAMB: Code for Anisotropies in the Microwave Background, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and CAMB: Code for Anisotropies in the Microwave Background will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1117159