Publications associées à Equation of state (cosmology)

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Fast and accurate CMB computations in non-flat FLRW universes

Julien Lesgourgues

We present a new method for calculating CMB anisotropies in a non-flat Friedmann universe, relying on a very stable algorithm for the calculation of hyperspherical Bessel functions, that can be pushed to arbitrary precision levels. We also introduce a new ...

Iop Publishing Ltd2014

Planck 2013 results. XXVI. Background geometry and topology of the Universe

Julien Lesgourgues, Jason Douglas McEwen, Fabio Finelli

The new cosmic microwave background (CMB) temperature maps from Planck provide the highest-quality full-sky view of the surface of last scattering available to date. This allows us to detect possible departures from the standard model of a globally homogen ...

Edp Sciences S A2014

Planck 2013 results. XVI. Cosmological parameters

Xin Chen, Julien Lesgourgues, Fabio Finelli, Jan Hamann

This paper presents the first cosmological results based on Planck measurements of the cosmic microwave background (CMB) temperature and lensing-potential power spectra. We find that the Planck spectra at high multipoles (l greater than or similar to 40) a ...

Edp Sciences S A2014

Cosmological parameter estimation with large scale structure observations

Julien Lesgourgues, Ruth Durrer

We estimate the sensitivity of future galaxy surveys to cosmological parameters, using the redshift dependent angular power spectra of galaxy number counts, C-l(z(1), z(2)), calculated with all relativistic corrections at first order in perturbation theory ...

Iop Publishing Ltd2014

Scalar masses in general N=2 gauged supergravity theories

Claudio Scrucca, Paul Smyth, Francesca Catino

We readdress the question of whether any universal upper bound exists on the square mass m(2) of the lightest scalar around a supersymmetry breaking vacuum in generic N=2 gauged supergravity theories for a given gravitino mass m(3/2) and cosmological const ...

Springer2014

Planck 2013 results. XX. Cosmology from Sunyaev-Zeldovich cluster counts

Julien Lesgourgues, Fabio Finelli

We present constraints on cosmological parameters using number counts as a function of redshift for a sub-sample of 189 galaxy clusters from the Planck SZ (PSZ) catalogue. The PSZ is selected through the signature of the Sunyaev-Zeldovich (SZ) effect, and ...

Edp Sciences S A2014

CMB power spectra and likelihood

Julien Lesgourgues, Fabio Finelli

This paper presents the Planck 2013 likelihood, a complete statistical description of the two-point correlation function of the CMB temperature fluctuations that accounts for all known relevant uncertainties, both instrumental and astrophysical in nature. ...

Edp Sciences S A2014

Higgs-dilaton cosmology: An effective field theory approach

Georgios Karananas, Javier Rubio

The Higgs-dilaton cosmological model is able to describe simultaneously an inflationary expansion in the early Universe and a dark energy dominated stage responsible for the present day acceleration. It also leads to a nontrivial relation between the spect ...

Amer Physical Soc2013

Conservative constraints on early cosmology with MONTE PYTHON

Julien Lesgourgues, Benjamin Audren

Models for the latest stages of the cosmological evolution rely on a less solid theoretical and observational ground than the description of earlier stages like BBN and recombination. As suggested in a previous work by Vonlanthen et al., it is possible to ...

Iop Publishing Ltd2013

Equation of state (cosmology)

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Higgs-Dilaton cosmology: Universality versus criticality

Fast and accurate CMB computations in non-flat FLRW universes

Planck 2013 results. XXVI. Background geometry and topology of the Universe

Planck 2013 results. XVI. Cosmological parameters

Cosmological parameter estimation with large scale structure observations

Scalar masses in general N=2 gauged supergravity theories

Planck 2013 results. XX. Cosmology from Sunyaev-Zeldovich cluster counts

CMB power spectra and likelihood

Higgs-dilaton cosmology: An effective field theory approach

Conservative constraints on early cosmology with MONTE PYTHON

Cosmological parameter estimation with large scale structure observations

Fast and accurate CMB computations in non-flat FLRW universes

Scalar masses in general N=2 gauged supergravity theories

Conservative constraints on early cosmology with MONTE PYTHON

Higgs-dilaton cosmology: An effective field theory approach

CMB power spectra and likelihood

Higgs-Dilaton cosmology: Universality versus criticality

Planck 2013 results. XVI. Cosmological parameters

Planck 2013 results. XX. Cosmology from Sunyaev-Zeldovich cluster counts

Planck 2013 results. XXVI. Background geometry and topology of the Universe