282 citations · 4.4k across the 110 of their papers we have counts for
7 papers · 1 filter
Effect of radiative transfer on damped Lyman-alpha and Lyman limit systems in cosmological SPH simulations
Hidenobu Yajima, Jun-Hwan Choi, Kentaro Nagamine
We study the effect of local stellar radiation and UVB on the physical properties of DLAs and LLSs at z=3 using cosmological SPH simulations. We post-process our simulations with t…
Multiphase, non-spherical gas accretion onto a black hole
Paramita Barai, Daniel Proga, Kentaro Nagamine
(Abridged) We investigate non-spherical behavior of gas accreting onto a central supermassive black hole performing simulations using the SPH code GADGET-3 including radiative cool…
Pairwise Velocities of Dark Matter Halos: a Test for the Lambda Cold Dark Matter Model using the Bullet Cluster
Robert Thompson, Kentaro Nagamine
The existence of 1E0657-56 poses a challenge to the concordance Lambda cold dark matter model. Here we investigate the velocity distribution of dark matter halo pairs in large N-bo…
Gamma-ray burst rate: high-redshift excess and its possible origins
Francisco J. Virgili, Bing Zhang, Kentaro Nagamine +1
Prompted by various analyses of long (Type II) GRB rates and their relationship to the cosmic star-formation history, metallicity and luminosity function evolution, we systematical…
Steep Faint-end Slopes of Galaxy Mass and Luminosity Functions at z>=6 and the Implications for Reionisation
Jason Jaacks, Jun-Hwan Choi, Kentaro Nagamine +2
We present the results of a numerical study comparing photometric and physical properties of simulated z=6-9 galaxies to the observations taken by the WFC3 instrument aboard the Hu…
SPH Simulations of Black Hole Accretion: A Step to Model Black Hole Feedback in Galaxies
Paramita Barai, Daniel Proga, Kentaro Nagamine
(Abridged) We test how accurately the smoothed particle hydrodynamics (SPH) numerical technique can follow spherically-symmetric Bondi accretion. Using the 3D SPH code GADGET-3, we…