English

Dynamics of Modified Chaplygin Gas Inflation on the Brane with Bulk Viscous Pressure

General Relativity and Quantum Cosmology 2017-02-22 v4 Cosmology and Nongalactic Astrophysics

Abstract

We investigate the role of bulk viscous pressure on the warm inflationary modified Chaplygin gas in brane-world framework in the presence of standard scalar field. We assume the intermediate inflationary scenario in strong dissipative regime and constructed the inflaton, potential, entropy density, slow-roll parameters, scalar and tensor power spectra, scalar spectral index and tensor-to-scalar ratio. We develop various trajectories such as nsNn_s - N, nsrn_s - r and nsαsn_s - \alpha_s (where nsn_s is the spectral index, αs\alpha_s is the running of spectral index, NN is the number of e-folds and rr is tensor-to-scalar ratio) for variable as well as constant dissipation and bulk viscous coefficients at high dissipative regime. It is interesting to remark here that our results of these parameters are compatible with recent observational data such as WMAP 7+97+9, BICEP22 and Planck data.

Keywords

Cite

@article{arxiv.1603.08798,
  title  = {Dynamics of Modified Chaplygin Gas Inflation on the Brane with Bulk Viscous Pressure},
  author = {Abdul Jawad and Amara Ilyas and Shamaila Rani},
  journal= {arXiv preprint arXiv:1603.08798},
  year   = {2017}
}

Comments

21 pages, 8 figures