Second-order Tight-coupling Code

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owlice
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Second-order Tight-coupling Code

Post by owlice » Sun Jan 09, 2011 6:45 pm

[c]Second-order Tight-coupling Code[/c][/b]
Abstract: Prior to recombination photons, electrons, and atomic nuclei rapidly scattered and behaved, almost, like a single tightly-coupled photon-baryon plasma. In order to solve the cosmological perturbation equations during that time, Cosmic Microwave Background (CMB) codes use the so-called tight-coupling approximation in which the problematic terms (i.e. the source of the stiffness) are expanded in inverse powers of the Thomson Opacity. Most codes only keep the terms linear in the inverse Thomson Opacity. We have developed a second-order tight-coupling code to test the validity of the usual first-order tight-coupling code. It is based on the publicly available code CAMB.

Credit: Cyr-Racine, Francis-Yan; Sigurdson, Kris

Site: http://www.phas.ubc.ca/~francis/Codes.html
http://adsabs.harvard.edu/abs/2011PhRvD..83j3521C

Bibcode: 2011ascl.soft01001C

ID: ascl:1101.001
Last edited by Ada Coda on Mon Dec 11, 2017 6:12 am, edited 1 time in total.
Reason: Updated code entry.
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