Buscar
Mostrando ítems 31-40 de 222
Morphological properties of superclusters of galaxies
(WILEY-BLACKWELL, 2011)
We studied superclusters of galaxies in a volume-limited sample extracted from the Sloan Digital Sky Survey Data Release 7 and from mock catalogues based on a semi-analytical model of galaxy evolution in the Millennium ...
A comparison of cosmological filaments catalogues
(Wiley Blackwell Publishing, Inc, 2020-04)
In this work, we compare three catalogues of cosmological filaments identified in the Sloan Digital Sky Survey by means of different algorithms by Tempel et al., Pereyra et al., and Martinez et al. We analyse how different ...
Dinámica y distribución de los vacios del universo
(2018-12)
En este trabajo de tesis realizamos un estudio estadístico de la dinámica y la distribución espacial de las mayores regiones del Universo desprovistas de galaxias brillantes, denominadas vacíos, utilizando datos observacionales ...
Cosmology from large-scale galaxy clustering and galaxy-galaxy lensing with Dark Energy Survey Science Verification data
(Oxford Univ Press, 2017-02-01)
We present cosmological constraints from the Dark Energy Survey (DES) using a combined analysis of angular clustering of red galaxies and their cross-correlation with weak gravitational lensing of background galaxies. We ...
Dark Energy Survey year 3 results: covariance modelling and its impact on parameter estimation and quality of fit
(2021-12-01)
We describe and test the fiducial covariance matrix model for the combined two-point function analysis of the Dark Energy Survey Year 3 (DES-Y3) data set. Using a variety of new ansatzes for covariance modelling and testing, ...
Validating the Fisher approach for stage IV spectroscopic surveys
(EDP Sciences S A, 2021)
In recent years, forecasting activities have become an important tool in designing and optimising large-scale structure surveys. To
predict the performance of such surveys, the Fisher matrix formalism is frequently used ...
On soft limits of large-scale structure correlation functions
(Iop Publishing Ltd, 2015-02-01)
We study soft limits of correlation functions for the density and velocity fields in the theory of structure formation. First, we re-derive the (resummed) consistency conditions at unequal times using the eikonal approximation. ...
On soft limits of large-scale structure correlation functions
(Iop Publishing Ltd, 2015)
The Lyman α forest power spectrum from the XQ-100 Legacy Survey
(Oxford University Press, 2017-05)
We present the Lyman α flux power spectrum measurements of the XQ-100 sample of
quasar spectra obtained in the context of the European Southern Observatory Large Programme
‘Quasars and their absorption lines: a legacy ...