Cluster Counts and Angular Power Spectrum

61 Pages·2016·6.45 MB·English

by  Rogerio Rosenfeld

Combining Cosmological Probes:
Cluster Counts and Angular Power Spectrum
Rogerio Rosenfeld
IFT-UNESP
LIneA
Work with Fabien Lacasa 1603.00918
Work in progress with Lacasa, Hoffmann and Gaztañaga
June 30, 2016 Madrid Workshop 1
Madrid Workshop 2
June 30, 2016 Madrid Workshop 3
today
4
Eisenstein
HST
June 30, 2016 5 Madrid Workshop
Large scale galaxy surveys are
instrumental for the determination of
cosmological parameters:
SDSS, BOSS, eBOSS
DES
PAU, J-PAS
DESI
LSST
...
June 30, 2016 Madrid Workshop 6
June 30, 2016 Madrid Workshop 7
Parameter estimation: likelihood function
requires a covariance matrix
Some probes are not independent: need
cross-correlations.
Aim: model the covariance matrix for
cluster number counts and angular
power spectrum
June 30, 2016 Madrid Workshop 8
How to estimate covariances?
•  Jackknife
•  Subsampling
•  Bootstrap
•  Mocks
•  Theoretical covariance (non-gaussian, model dependence)
Jury is still out
June 30, 2016 Madrid Workshop 9
Super sample covariance
1603.00918
“Super sample
covariance”
June 30, 2016 Madrid Workshop 10