8 papers
Void Lensing as a Test of Gravity
Tessa Baker, Joseph Clampitt, Bhuvnesh Jain +1
We investigate the potential of weak lensing by voids to test for deviations from General Relativity. We calculate the expected lensing signal of a scalar field with derivative cou…
Density split statistics: Cosmological constraints from counts and lensing in cells in DES Y1 and SDSS data
D. Gruen, O. Friedrich, E. Krause +93
We derive cosmological constraints from the probability distribution function (PDF) of evolved large-scale matter density fluctuations. We do this by splitting lines of sight by de…
The ellipticity of galaxy cluster halos from satellite galaxies and weak lensing
Tae-hyeon Shin, Joseph Clampitt, Bhuvnesh Jain +4
We study the ellipticity of galaxy cluster halos as characterized by the distribution of cluster galaxies and as measured with weak lensing. We use monte-carlo simulations of ellip…
Weak-lensing mass calibration of redMaPPer galaxy clusters in Dark Energy Survey Science Verification data
P. Melchior, D. Gruen, T. McClintock +78
We use weak-lensing shear measurements to determine the mean mass of optically selected galaxy clusters in Dark Energy Survey Science Verification data. In a blinded analysis, we s…
Observing dynamical friction in galaxy clusters
Susmita Adhikari, Neal Dalal, Joseph Clampitt
We present a novel method to detect the effects of dynamical friction in observed galaxy clusters. Following accretion into clusters, massive satellite galaxies will backsplash to…
Tidal stripping as a test of satellite quenching in redMaPPer clusters
Yuedong Fang, Joseph Clampitt, Neal Dalal +4
When dark matter halos are accreted by massive host clusters, strong gravitational tidal forces begin stripping mass from the accreted subhalos. This stripping eventually removes a…