2011

The nonlinear power spectrum in clustering quintessence cosmologies

D'Amico, Guido, Sefusatti, Emiliano

Understand

We study the nonlinear evolution of density perturbations in cosmologies where the late-time accelerated expansion is driven by a quintessence field with vanishing speed of sound.

For these models matter and quintessence perturbations are comoving and it is possible to write a single continuity equation for the total density fluctuations given by a weighted sum of the two components.
Including the Euler equation for the common velocity field we solve the evolution equations for the nonlinear, total density power spectrum in the Time-Renormalization Group approach.
In fact any cosmological observable is directly related by gravity only to the total density perturbations, with the two components being individually unobservable.

Built on

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Similar

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Then

“The effective theory of quintessence: the
Creminelli, P., D’Amico, G., Noreña, J., & Vernizzi, F., 2009 · 2009
Later among the works it cites.
“Scale-dependent bias induced by local non-gaussianity: a comparison to n-body simulations.”
Original
Desjacques, V., Seljak, U., & Iliev, I. T., 2009 · 2009
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“Non-linear power spectrum including massive neutrinos: the time-rg flow approach.”
Original
Lesgourgues, J., Matarrese, S., Pietroni, M., & Riotto, A., 2009 · 2009
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“Fingerprinting dark energy.”
Original
Sapone, D. & Kunz, M., 2009 · 2009
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“Signatures of primordial non-Gaussianities in the matter power-spectrum and bispectrum: the time-RG approach.”
Original
Bartolo, N., Beltrán Almeida, J. P., Matarrese, S., Pietroni, M., & Riotto, A., 2010 · 2010
Later among the works it cites.
“Multipoint propagators for non-gaussian initial conditions.”
Original
Bernardeau, F., Crocce, M., & Sefusatti, E., 2010 · 2010
Later among the works it cites.
“Spherical collapse in quintessence models with zero speed of sound.”
Original
Creminelli, P., D’Amico, G., Noreña, J., Senatore, L., & Vernizzi, F., 2010 · 2010
Later among the works it cites.
“Dust of dark energy.”
Original
Lim, E. A., Sawicki, I., & Vikman, A., 2010 · 2010
Later among the works it cites.
“Fingerprinting dark energy. ii. weak lensing and galaxy clustering tests.”
Original
Sapone, D., Kunz, M., & Amendola, L., 2010 · 2010
Later among the works it cites.
in preparation
Anselmi, S., Ballesteros, G., & Pietroni, M., 2011 · 2011
Closest in time.
“Nonlinear perturbation theory integrated with nonlocal bias, redshift-space distortions, and primordial non-gaussianity.”
Original
Matsubara, T., 2011 · 2011
Closest in time.
“Cosmological structure formation with clustering quintessence.”
Original
Sefusatti, E. & Vernizzi, F., 2011 · 2011
Closest in time.

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