Computing model independent perturbations in dark energy and modified gravity

Дата и время публикации : 2013-11-26T16:59:40Z

Авторы публикации и институты :
Richard A. Battye
Jonathan A. Pearson

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Первичная категория: astro-ph.CO

Все категории : astro-ph.CO, gr-qc, hep-th

Краткий обзор статьи: We present a methodology for computing model independent perturbations in dark energy and modified gravity. This is done from the Lagrangian for perturbations, by showing how field content, symmetries and physical principles are often sufficient ingredients for closing the set of perturbed fluid equations. Our main results are the proof of the equation of state for perturbations presented in a previous paper, and the development of the required calculational tools.

Category: Physics