Generation and Evolution of the Density Fluctuation in the Evolving Universe. I: The Effect of Weak Transient Phenomena | Zendy

Hideo Kodama | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

Generation and Evolution of the Density Fluctuation in the Evolving Universe. I: The Effect of Weak Transient Phenomena

Author(s) -

Hideo Kodama

Publication year - 1984

Publication title -

progress of theoretical physics

Language(s) - English

Resource type - Journals

eISSN - 1347-4081

pISSN - 0033-068X

DOI - 10.1143/ptp.71.946

Subject(s) - physics , adiabatic process , equation of state , isotropy , cosmological perturbation theory , amplitude , primordial fluctuations , cosmic cancer database , anisotropy , universe , mathematical physics , quantum electrodynamics , classical mechanics , cosmology , quantum mechanics , astrophysics , cosmic microwave background

The possibility of large-scale adiabatic density fluctuations being generated by stress perturbations associated with transition phenomena in the early universe is investigated using Bardeen's gauge invariant formalism. Especially the effect of small change in the equation of state of background matter is estimated. It is shown that such effect is not important and the cOhclusion obtained by Press and Vishniac in the case of no change in the equation of state .holds even if a small change in the equation of state of background matter coexists with stress perturbations. Namely the amplitudes of generated density fluctuations when they enter within the particle horizon are of the order of the strength of seed stress perturbations regardless of their type, isotropic or' anisotropic.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research