Cargando…
Cosmological Parameter Estimation with Large Scale Structure Observations
We estimate the sensitivity of future galaxy surveys to cosmological parameters, using the redshift dependent angular power spectra of galaxy number counts, $C_\ell(z_1,z_2)$, calculated with all relativistic corrections at first order in perturbation theory. We pay special attention to the redshift...
Autores principales: | , , , |
---|---|
Lenguaje: | eng |
Publicado: |
2013
|
Materias: | |
Acceso en línea: | https://dx.doi.org/10.1088/1475-7516/2014/01/042 http://cds.cern.ch/record/1595874 |
_version_ | 1780931151188197376 |
---|---|
author | Di Dio, Enea Montanari, Francesco Durrer, Ruth Lesgourgues, Julien |
author_facet | Di Dio, Enea Montanari, Francesco Durrer, Ruth Lesgourgues, Julien |
author_sort | Di Dio, Enea |
collection | CERN |
description | We estimate the sensitivity of future galaxy surveys to cosmological parameters, using the redshift dependent angular power spectra of galaxy number counts, $C_\ell(z_1,z_2)$, calculated with all relativistic corrections at first order in perturbation theory. We pay special attention to the redshift dependence of the non-linearity scale and present Fisher matrix forecasts for Euclid-like and DES-like galaxy surveys. We compare the standard $P(k)$ analysis with the new $C_\ell(z_1,z_2)$ method. We show that for surveys with photometric redshifts the new analysis performs significantly better than the $P(k)$ analysis. For spectroscopic redshifts, however, the large number of redshift bins which would be needed to fully profit from the redshift information, is severely limited by shot noise. We also identify surveys which can measure the lensing contribution and we study the monopole, $C_0(z_1,z_2)$. |
id | cern-1595874 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2013 |
record_format | invenio |
spelling | cern-15958742023-03-14T16:32:56Zdoi:10.1088/1475-7516/2014/01/042http://cds.cern.ch/record/1595874engDi Dio, EneaMontanari, FrancescoDurrer, RuthLesgourgues, JulienCosmological Parameter Estimation with Large Scale Structure ObservationsAstrophysics and AstronomyWe estimate the sensitivity of future galaxy surveys to cosmological parameters, using the redshift dependent angular power spectra of galaxy number counts, $C_\ell(z_1,z_2)$, calculated with all relativistic corrections at first order in perturbation theory. We pay special attention to the redshift dependence of the non-linearity scale and present Fisher matrix forecasts for Euclid-like and DES-like galaxy surveys. We compare the standard $P(k)$ analysis with the new $C_\ell(z_1,z_2)$ method. We show that for surveys with photometric redshifts the new analysis performs significantly better than the $P(k)$ analysis. For spectroscopic redshifts, however, the large number of redshift bins which would be needed to fully profit from the redshift information, is severely limited by shot noise. We also identify surveys which can measure the lensing contribution and we study the monopole, $C_0(z_1,z_2)$.We estimate the sensitivity of future galaxy surveys to cosmological parameters, using the redshift dependent angular power spectra of galaxy number counts, Cℓ(z1,z2), calculated with all relativistic corrections at first order in perturbation theory.We pay special attention to the redshift dependence of the non-linearity scale and present Fisher matrix forecasts for Euclid-like and DES-like galaxy surveys. We compare the standard P(k) analysis with the new Cℓ(z1,z2) method. We show that for surveys with photometric redshifts the new analysis performs significantly better than the P(k) analysis. For spectroscopic redshifts, however, thelarge number of redshift bins which would beneeded to fully profit from the redshift information, is severely limited by shot noise.We also identify surveys which can measure the lensing contribution and we study the monopole, C0(z1,z2).We estimate the sensitivity of future galaxy surveys to cosmological parameters, using the redshift dependent angular power spectra of galaxy number counts, $C_\ell(z_1,z_2)$, calculated with all relativistic corrections at first order in perturbation theory. We pay special attention to the redshift dependence of the non-linearity scale and present Fisher matrix forecasts for Euclid-like and DES-like galaxy surveys. We compare the standard $P(k)$ analysis with the new $C_\ell(z_1,z_2)$ method. We show that for surveys with photometric redshifts the new analysis performs significantly better than the $P(k)$ analysis. For spectroscopic redshifts, however, the large number of redshift bins which would be needed to fully profit from the redshift information, is severely limited by shot noise. We also identify surveys which can measure the lensing contribution and we study the monopole, $C_0(z_1,z_2)$.arXiv:1308.6186LAPTH-037-13CERN-PH-TH-2013-155LAPTH-037-13CERN-PH-TH-2013-155oai:cds.cern.ch:15958742013-08-28 |
spellingShingle | Astrophysics and Astronomy Di Dio, Enea Montanari, Francesco Durrer, Ruth Lesgourgues, Julien Cosmological Parameter Estimation with Large Scale Structure Observations |
title | Cosmological Parameter Estimation with Large Scale Structure Observations |
title_full | Cosmological Parameter Estimation with Large Scale Structure Observations |
title_fullStr | Cosmological Parameter Estimation with Large Scale Structure Observations |
title_full_unstemmed | Cosmological Parameter Estimation with Large Scale Structure Observations |
title_short | Cosmological Parameter Estimation with Large Scale Structure Observations |
title_sort | cosmological parameter estimation with large scale structure observations |
topic | Astrophysics and Astronomy |
url | https://dx.doi.org/10.1088/1475-7516/2014/01/042 http://cds.cern.ch/record/1595874 |
work_keys_str_mv | AT didioenea cosmologicalparameterestimationwithlargescalestructureobservations AT montanarifrancesco cosmologicalparameterestimationwithlargescalestructureobservations AT durrerruth cosmologicalparameterestimationwithlargescalestructureobservations AT lesgourguesjulien cosmologicalparameterestimationwithlargescalestructureobservations |