137 citations · 1.3k across the 30 of their papers we have counts for
7 papers · 1 filter
A gradient expansion for cosmological backreaction
Kari Enqvist, Shaun Hotchkiss, Gerasimos Rigopoulos
We address the issue of cosmological backreaction from non-linear structure formation by constructing an approximation for the time evolved metric of a dust dominated universe base…
Observable gravitational waves from inflation with small field excursions
Shaun Hotchkiss, Anupam Mazumdar, Seshadri Nadathur
The detection of primordial gravitational waves, or tensor perturbations, would be regarded as compelling evidence for inflation. The canonical measure of this is the ratio of tens…
The integrated Sachs-Wolfe imprints of cosmic superstructures: a problem for ΛCDM
Seshadri Nadathur, Shaun Hotchkiss, Subir Sarkar
A crucial diagnostic of the ΛCDM cosmological model is the integrated Sachs-Wolfe (ISW) effect of large-scale structure on the cosmic microwave background (CMB). The ISW imprint of…
A critical analysis of high-redshift, massive galaxy clusters: I
Ben Hoyle, Raul Jimenez, Licia Verde +1
We critically investigate current statistical tests applied to high redshift clusters of galaxies in order to test the standard cosmological model and describe their range of valid…
Quantifying the rareness of extreme galaxy clusters
Shaun Hotchkiss
I show that the most common method of quantifying the likelihood that an extreme galaxy cluster could exist is biased and can result in false claims of tension with LambdaCDM. This…
The Extreme Tail of the Non-Gaussian Mass Function
Aseem Paranjape, Christopher Gordon, Shaun Hotchkiss
Number counts of massive high-redshift clusters provide a window to study primordial non-Gaussianity. The current quality of data, however, forces the statistical analysis to probe…