2018/09/06 by Jai-chan Hwang, Hwang, Jai-chan, Hyerim Noh +6
Physics and Astronomy · #Cosmology and Gravitation Theories #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #Pulsars and Gravitational Waves Research #Stellar, planetary, and galactic studies #astro-ph.CO #gr-qc
paper · pdf · doi:10.48550/arxiv.1809.01781
7 pages, 5 figures
arxiv created 2018/09/06 · openalex publication_date 2018/09/06 · arxiv updated 2018/09/07 · openalex created_date 2018/09/27 · openalex updated_date 2026/07/28
We present perturbation initial conditions for two types of scalar field potential often used in the dark energy study: one inverse power-law and the other exponential. The solutions are presented in the presence of the w = constant fluid (w = 1/3 for radiation fluid), a minimally coupled scalar field and a sub-dominating zero-pressure fluid (cold dark matter and baryon dust). We consider two gauge conditions, the w-fluid comoving gauge and the cold-dark-matter comoving gauge; solutions in the latter gauge are derived by the gauge transformation and this method can be applied to derive solutions in any other gauge condition.