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Detecting Mass Substructure in Galaxy Clusters: An Aperture Mass Statistic for Gravitational Flexion
Adrienne Leonard, Lindsay J. King, Stephen M. Wilkins
Gravitational flexion has recently been introduced as a technique by which one can map out and study substructure in clusters of galaxies. Previous analyses involving flexion have…
Extragalactic Constraints on the Initial Mass Function
Stephen M. Wilkins, Andrew M. Hopkins, Neil Trentham +1
The local stellar mass density is observed to be significantly lower than the value obtained from integrating the cosmic star formation history (SFH), assuming that all the stars f…
The Evolution of Stellar Mass Density and its Implied Star Formation History
S. M. Wilkins, N. Trentham, A. M. Hopkins
Using a compilation of measurements of the stellar mass density as a function of redshift we can infer the cosmic star formation history. For z < 0.7 there is good agreement betwee…
The Evolution of Stellar Mass and the Implied Star Formation History
Stephen M. Wilkins, Neil Trentham, Andrew M. Hopkins
We present a compilation of measurements of the stellar mass density as a function of redshift. Using this stellar mass history we obtain a star formation history and compare it to…
The Galaxy Power Spectrum: 2dFGRS-SDSS tension?
Shaun Cole, Ariel G. Sanchez, Stephen Wilkins
Published galaxy power spectra from the 2dFGRS and SDSS are not in good agreement. We revisit this issue by analyzing both the 2dFGRS and SDSS DR5 catalogues using essentially iden…