Results 11 to 20 of about 95 (59)

Gravity in the Local Universe : density and velocity fields using CosmicFlows-4 [PDF]

, 2023
This article publicly releases three-dimensional reconstructions of the local Universe gravitational field below z=0.8 that were computed using the CosmicFlows-4 catalog of 56,000 galaxy distances and its sub-sample of 1,008 type Ia supernovae distances.
Baulieu, G., H. M. Courtois, Courtois, H. M., Brenas, P., F. Ruppin, A. Dupuy, D. Guinet, Dupuy, A., Courtois, H.M., P. Brenas, Ruppin, F., Guinet, D., G. Baulieu   +12 more
core   +1 more source

DESI DR1 ShapeFit+BAO growth ratios: a compressed-likelihood constraint on the GCV growth-response amplitude (epsilon) - v2.0.0

OSF mirror of the Zenodo record “DESI DR1 ShapeFit+BAO growth-ratio likelihood constraints on the GCV response sector” (v2.0.0, Zenodo DOI: 10.5281/zenodo.18514836).
Carl Germund Johansson
core   +4 more sources

First Cosmic Shear Results from the Canada-France-Hawaii Telescope Wide Synoptic Legacy Survey

, 2006
International audienceWe present the first measurements of the weak gravitational lensing signal induced by the large-scale mass distribution in the universe from data obtained as part of the ongoing Canada-France-Hawaii Telescope Legacy Survey (CFHTLS).
van Waerbeke, Ludovic, Hoekstra, Henk, Tereno, I., Semboloni, Elisabetta, Mellier, Yannick, Benabed, Karim, Fu, L., Parker, L. C., Hudson, M. J.   +8 more
core   +3 more sources

The XMM-LSS Cluster Sample and its Cosmological Applications. Prospects for the XMM next decade [PDF]

, 2008
peer reviewedThe well defined selection function of the XMM-LSS survey enables a simultaneous modelling of the observed cluster number counts and of the evolution of the L-T relation.
Chiappetti, L., Quintana, H., Melin, J.-B., Jones, L. R., Le Fèvre, O., Duc, P.-A., Jean, C., Röttgering, H. J. A., Altieri, B., Galaz, G., Hertling, G., Mazure, A., Ponman, T. J., Pierre, M., Surdej, Jean, Gueguen, A., Willis, J. P., Garcet, O., Le Fèvre, J.-P., Libbrecht, C., Maccagni, D., Refregier, A., Bremer, M. N., Valtchanov, I., Pacaud, F., Sprimont, P.-G., Adami, C., Alloin, D., Andreon, S., Proust, D., Detal, A., Birkinshaw, M., Trinchieri, G.   +32 more
core   +1 more source

3D Cosmic Shear: Cosmology from CFHTLenS [PDF]

, 2014
This paper presents the first application of 3D cosmic shear to a wide-field weak lensing survey. 3D cosmic shear is a technique that analyses weak lensing in three dimensions using a spherical harmonic approach, and does not bin data in the redshift ...
Hudson, M.J., T. Erben, Kilbinger, M, A. Kiessling, Kitching, T. D., Alsing, J, L. Miller, L. Van Waerbeke, Kilbinger, M., T. D. Kitching, Hoekstra, H., Kuijken, K., Heavens, A.F., Fu, L, Rowe, B. T. P., Mellier, Y, C. Heymans, M. Vel, Schrabback, T., Heavens, A. F., Kiessling, A., Schrabback, T, L. Fu, Kitching, T.D., Hudson, MJ, Jaffe, A, Kiessling, A, B. T. P. Rowe, Erben, T, Erben, T., Hildebrandt, H, Heymans, C, Kuijken, K, Fu, L., Rowe, B.T.P., Kitching, TD, Hudson, M. J., Miller, L., Y. Mellier, Mellier, Y., Kuijken, K.H., Velander, M, M. Kilbinger, Heavens, AF, Coupon, J., Heymans, C., Hoekstra, H, J. Alsing, M. J. Hudson, E. Semboloni, Hildebrandt, H., Rowe, BTP, J. Benjamin, Benjamin, J., Semboloni, E., Coupon, J, H. Hildebr, K. Kuijken, A. F. Heavens, T. Schrabback, Jaffe, A., van Waerbeke, L, Velander, M., Benjamin, J, van Waerbeke, L., Miller, L, J. Coupon, Waerbeke, L., H. Hoekstra, Semboloni, E, A. Jaffe, Alsing, J.   +71 more
core   +1 more source

MODELING THE POWER SPECTRUM OF DENSITY-FLUCTUATIONS - A PHENOMENOLOGICAL APPROACH [PDF]

, 1994
We show how, based on considerations on the observed form of the galaxy two-point spatial correlation function xi(r), a very simplified-yet surprisingly effective-model for the linear density fluctuations power spectrum can be constructed.
Guzzo, Luigi, Branchini, Enzo, BRANCHINI, ENZO FRANCO, Valdarnini, Riccardo, GUZZO L, VALDARNINI R., Enzo Branchini, Luigi Guzzo, Riccardo Valdarnini   +8 more
core   +2 more sources

Seeing in the Dark: Weak Lensing from the Sloan Digital Sky Survey [PDF]

, 2012
Statistical weak lensing by large-scale structure { cosmic shear { is a promising cosmological tool, which has motivated the design of several large upcoming astronomical surveys.
Huff, Eric Michael
core   +1 more source

Cosmological constraints from type ia supernovae peculiar velocity measurements.

, 2016
We detect the correlated peculiar velocities of nearby type Ia supernovae (SNe), while highlighting an error in some of the literature. We find sigma8 = 0.79 +/- 0.22 from SNe, and examine the potential of this method to constrain cosmological parameters

core   +1 more source

The power spectrum dependence of dark matter halo concentrations [PDF]

, 2001
High-resolution N-body simulations are used to examine the power spectrum dependence of the concentration of galaxy-sized dark matter halos. It is found that dark halo concentrations depend on the amplitude of mass fluctuations as well as on the ratio of
Eke, V.R., Steinmetz, M., Navarro, J.F.
core   +1 more source

Target selection for the DESI Peculiar Velocity Survey [Dataset]

, 2023
Supplementary material to DESI's publication "Target Selection for the DESI Peculiar Velocity Survey" to comply with the data management plan. Contains data for: Figure 1: color-color diagram, comparing truth catalogues to data from the survey.
Prada, Francisco, Saulder, Christoph
core   +1 more source