67 citations · 217 across the 8 of their papers we have counts for
8 papers
Halo asymmetry in the modelling of galaxy clustering
Anna Durkalec, Agnieszka Pollo, Ummi Abbas
Conventional studies of galaxy clustering within the framework of halo models typically assume that the density profile of all dark matter haloes can be approximated by the Navarro…
Differential Astrometric Framework for the Jupiter Relativistic Experiment with Gaia
Ummi Abbas, Beatrice Bucciarelli, Mario G. Lattanzi
We employ differential astrometric methods to establish a small field reference frame stable at the micro-arcsecond (as) level on short timescales using high-cadence simulated o…
Measures of Galaxy Environment - III. Difficulties in identifying proto-clusters at z ~ 2
Genevieve M. Shattow, Darren J. Croton, Ramin A. Skibba +3
Galaxy environment is frequently discussed, but inconsistently defined. It is especially difficult to measure at high redshift where only photometric redshifts are available. With…
Measures of galaxy environment -- II. Rank-ordered mark correlations
Ramin A. Skibba, Ravi K. Sheth, Darren J. Croton +4
We analyze environmental correlations using mark clustering statistics with the mock galaxy catalogue constructed by Muldrew et al. (Paper I). We find that mark correlation functio…
Strong clustering of underdense regions and the environmental dependence of clustering from Gaussian initial conditions
Ummi Abbas, Ravi K. Sheth
We discuss two slightly counter-intuitive findings about the environmental dependence of clustering in the Sloan Digital Sky Survey. First, we find that the relation between cluste…
The environmental dependence of galaxy clustering in the Sloan Digital Sky Survey
Ummi Abbas, Ravi K. Sheth
A generic prediction of hierarchical clustering models is that the mass function of dark haloes in dense regions in the Universe should be top-heavy. We provide a novel test of thi…