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18 papers · 2 filters
Accurate Modeling of Weak Lensing with the sGL Method
Kimmo Kainulainen, Valerio Marra
We revise and extend the stochastic approach to cumulative weak lensing (hereafter the sGL method) first introduced in Ref. [1]. Here we include a realistic halo mass function and…
On the role of shear in cosmological averaging II: large voids, non-empty voids and a network of different voids
Maria Mattsson, Teppo Mattsson
We study the effect of shear on the cosmological backreaction in the context of matching voids and walls together using the exact inhomogeneous Lemaitre-Tolman-Bondi solution. Gene…
The self-interacting curvaton
Kari Enqvist
The evolution of the curvature perturbation is highly non-trivial for curvaton models with self-interactions and is very sensitive to the parameter values. The final perturbation d…
Estimating f_NL and g_NL from Massive High-Redshift Galaxy Clusters
Kari Enqvist, Shaun Hotchkiss, Olli Taanila
There are observations of 15 high-redshift massive galaxy clusters, which have an extremely small probability with a purely Gaussian initial curvature perturbation. Here we revisit…
Short-lived star-forming giant clumps in cosmological simulations of z~2 disks
Shy Genel, Thorsten Naab, Reinhard Genzel +7
Many observed massive star-forming z\approx2 galaxies are large disks that exhibit irregular morphologies, with \sim1kpc, \sim10^(8-10)Msun clumps. We present the largest sample to…
Suzaku observations of X-ray excess emission in the cluster of galaxies A3112
T. Lehto, J. Nevalainen, M. Bonamente +2
We analysed the Suzaku XIS1 data of the A3112 cluster of galaxies in order to examine the X-ray excess emission in this cluster reported earlier with the XMM-Newton and Chandra sat…