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We use 80922 galaxies in the Galaxy And Mass Assembly (GAMA) survey to measure the galaxy luminosity function (LF) in different environments over the redshift range 0.04<z<0.26. The depth and size of GAMA allows us to define samples split…

We measure the bivariate luminosity function (BLF) of galaxy pairs and use it to probe and characterize the galaxy-galaxy interaction between pair members. The galaxy pair sample is selected from the main galaxy sample of Sloan Digital Sky…

On the scale of the cosmic horizon, signatures that are unique to general relativity are concealed within the statistics of the large scale distribution of galaxies. These were thought to be beyond the reach of all but the most ambitious…

宇宙学与河外天体物理 · 物理学 2026-03-03 Samantha Josephine Rossiter , Stefano Camera , Federico Montano , Chris Clarkson , Dionysios Karagiannis , Roy Maartens

It is well established in the local Universe that regions of high star-formation rate are dusty. As a result of this physical causal link, galaxies of increasing current star formation activity emit a larger proportion of their bolometric…

天体物理学 · 物理学 2007-05-23 Matthew A. Malkan

We use very deep (R_lim=27) UGRI imaging to study the evolution of the faint end of the UV-selected galaxy luminosity function from z~4 to z~2. We find that the luminosity function evolves with time and that this evolution is differential…

天体物理学 · 物理学 2007-05-23 Marcin Sawicki , David Thompson

We investigate the luminosity functions (LFs) and projected number density profiles of galactic satellites around isolated primaries of different luminosities. We measure these quantities for model satellites placed into the Millennium and…

宇宙学与河外天体物理 · 物理学 2015-06-12 Quan Guo , Shaun Cole , Vincent Eke , Carlos Frenk , John Helly

The number of galaxies with measured redshifts > 1 is at present rapidly increasing, allowing for measurements of their correlation function. The correlations function is measured in redshift space, as a function of angular separation and…

天体物理学 · 物理学 2009-10-31 Vibhat Nair

We calculate the expected number of gravitationally lensed optical, radio and sub-mm lensed sources on the whole sky due to foreground galaxy clusters for different cosmological models. We improve previous calculations of lensed arc…

天体物理学 · 物理学 2011-05-23 Asantha R. Cooray

We re-analyze constraints on the cosmological constant that can be obtained by examining the statistics of strong gravitational lensing of distant quasars by intervening galaxies, focusing on uncertainties in galaxy models (including…

天体物理学 · 物理学 2007-05-23 Yu-Chung N. Cheng , Lawrence M. Krauss

We use a series of ray-tracing experiments to determine the magnification distribution of high-redshift sources by gravitational lensing. We determine empirically the relation between magnification and redshift, for various cosmological…

天体物理学 · 物理学 2007-05-23 Premana Premadi , Hugo Martel

We report the correlation analysis of various redshift surveys which shows that the available data are consistent with each other and manifest fractal correlations (with dimension $D \simeq 2$) up to the present observational limits…

天体物理学 · 物理学 2009-10-30 M. Montuori , F. Sylos Labini , A. Gabrielli , A. Amici , L. Pietronero

The Lenses Structure and Dynamics (LSD) Survey aims at measuring the luminous and dark matter distribution of high redshift early-type galaxies by combining gravitational lens analysis with newly determined velocity dispersion profiles.…

天体物理学 · 物理学 2007-05-23 T. Treu , L. V. E. Koopmans

Using galaxy sample observed by the BATC large-field multi-color sky survey and galaxy data of SDSS in the overlapped fields, we study the dependence of the restframe $r$-band galaxy luminosity function on redshift and on large-scale…

天体物理学 · 物理学 2011-02-11 Lifang Xia , Xu Zhou , Yanbin Yang , Jun Ma , Zhaoji Jiang

We use a combination of N-body simulations of the hierarchical clustering of dark matter and semi-analytic modelling of the physics of galaxy formation to probe the relationship between the galaxy distribution and the mass distribution. The…

天体物理学 · 物理学 2009-10-31 A. J. Benson , C. M. Baugh , S. Cole , C. S. Frenk , C. G. Lacey

In a flat, k=0 cosmology with galaxies that approximate singular isothermal spheres, gravitational lens image separations should be uncorrelated with source redshift. But in an open k=-1 cosmology such gravitational lens image separations…

天体物理学 · 物理学 2009-10-30 Myeong-Gu Park , J. Richard Gott

Recent galaxy formation models successfully reproduce the local luminosity function (LF) of galaxies by invoking mechanisms to suppress star formation in low- and high-mass galaxies. As these models are optimized to fit the LF at low…

天体物理学 · 物理学 2008-01-07 Danilo Marchesini , Pieter van Dokkum

The magnification effect of gravitational lensing is a powerful probe of the distribution of matter in the universe, yet it is frequently overlooked due to the fact that its signal to noise is smaller than that of lensing shear. Because its…

宇宙学与河外天体物理 · 物理学 2014-04-23 Anne H. Bauer , Enrique Gaztañaga , Pol Martí , Ramon Miquel

We determine the evolution of the galaxy luminosity function (LF) as a function of spectral type using the Autofib redshift survey, a compendium of over 1700 galaxy redshifts in various magnitude-limited samples spanning b_J=11.5-24.0. To…

天体物理学 · 物理学 2015-06-24 Jeremy Heyl , Matthew Colless , Richard S. Ellis , Tom Broadhurst

By cross-correlating large samples of galaxy clusters with publicly available radio source catalogs, we construct the volume-averaged radio luminosity function (RLF) in clusters of galaxies, and investigate its dependence on cluster…

宇宙学与河外天体物理 · 物理学 2015-05-27 M. W. Sommer , K. Basu , F. Pacaud , F. Bertoldi , H. Andernach

Whitbourn & Shanks (2014) have reported evidence for a local void underdense by ~15% extending to 150-300h-1Mpc around our position in the Southern Galactic Cap (SGC). Assuming a local luminosity function they modelled K- and r-limited…

宇宙学与河外天体物理 · 物理学 2016-04-14 J. R. Whitbourn , T. Shanks