Larissa Santos

Neutrinos and dark energy constraints from future galaxy surveys and CMB lensing information

We explore the possibility of obtaining better constraints from future astronomical data by means of the Fisher information matrix formalism. In particular, we consider how cosmic microwave background (CMB) lensing information can improve our parameter error estimation. We consider a massive neutrino scenario and a time-evolving dark energy equation of state in the Lambda cold dark matter framework. We use Planck satellite experimental specifications together with the future galaxy survey Euclid in our forecast. We found improvements in almost all studied parameters considering Planck alone when CMB lensing information is used. In this case, the improvement with respect to the constraints found without using CMB lensing is of 93\% around the fiducial value for the neutrino parameter. The improvement on one of the dark energy parameters reaches 4.4\%. When Euclid information is included in the analysis, the improvements on the neutrino parameter constraint are of approximately 128\% around its fiducial value. The addition of Euclid information provides smaller errors on the dark energy parameters as well. For Euclid alone, the figure of merit is a factor of similar to 29 higher than that from Planck alone even considering CMB lensing. Finally, the consideration of a nearly perfect CMB experiment showed that CMB lensing cannot be neglected, especially in more precise future CMB experiments, since it provided in our case a six-times-better figure of merit with respect to the unlensed CMB analysis.

Constraining interacting dark energy with CMB and BAO future surveys

In this paper, we perform a forecast analysis to test the capacity of future baryon acoustic oscillation (BAO) and cosmic microwave background (CMB) experiments to constrain phenomenological interacting dark energy models using the Fisher matrix formalism. We consider a Euclid-like experiment, in which BAO measurements is one of the main goals, to constrain the cosmological parameters of alternative cosmological models. Moreover, additional experimental probes can more efficiently provide information on the parameters forecast, justifying also the inclusion in the analysis of a future ground-based CMB experiment mainly designed to measure the polarization signal with high precision. In the interacting dark energy scenario, a coupling between dark matter and dark energy modifies the conservation equations such that the fluid equations for both constituents are conserved as the total energy density of the dark sector. In this context, we consider three phenomenological models which have been deeply investigated in literature over the past years. We find that the combination of both CMB and BAO information can break degeneracies among the dark sector parameters for all three models, although to different extents. We found powerful constraints on, for example, the coupling constant when comparing it with present limits for two of the models, and their future statistical 3-

Probing the statistical properties of CMB B-mode polarization through Minkowski functionals

\sigma

Asymmetries in the angular distribution of the cosmic microwave background

bounds could potentially exclude the null interaction for the combination of probes that is considered. However, for one of the models, the constraint on the coupling parameter does not improve the present result (achieved using a large combination of surveys), and a larger combination of probes appears to be necessary to eventually claim whether or not interaction is favored in that context.

Preferred axis of CMB parity asymmetry in the masked maps

The detection of the magnetic type

Quadrant asymmetry in the angular distribution of cosmic microwave background in the Planck satellite data

B

Thermal gravitational-wave background in the general pre-inflationary scenario

-mode polarization is the main goal of future cosmic microwave background (CMB) experiments. In the standard model, the

Forecasting isocurvature models with CMB lensing information: axion and curvaton scenarios

B

Statistical imprints of CMB B-type polarization leakage in an incomplete sky survey analysis

-mode map is a strongly non-gaussian field due to the lensed component. Besides the two-point correlation function, the other statistics are also very important to dig the information of the polarization map. In this paper, we employ the Minkowski functionals to study the morphological properties of the lensed

The Weird Side of the Universe: Preferred Axis

B