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Properties of galaxies reproduced by a hydrodynamic simulation
TLDR
A simulation that starts 12 million years after the Big Bang, and traces 13 billion years of cosmic evolution with 12 billion resolution elements in a cube of 106.5 megaparsecs a side yields a reasonable population of ellipticals and spirals, reproduces the observed distribution of galaxies in clusters and characteristics of hydrogen on large scales, and at the same time matches the ‘metal’ and hydrogen content of galaxies on small scales.
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Did LIGO Detect Dark Matter?
TLDR
It is considered that the black-hole (BH) binary detected by LIGO may be a signature of dark matter, and reasonable estimates span a range that overlaps the 2-53  Gpc^{-3} yr^{-1} rate estimated from GW150914, thus raising the possibility that LigO has detected PBH dark matter.
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CMBPol Mission Concept Study Probing Ination with CMB Polarization
We summarize the utility of precise cosmic microwave background (CMB) polarization measurements as probes of the physics of ination. We focus on the prospects for using CMB measurements
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Massive neutrinos and the non‐linear matter power spectrum
We perform an extensive suite of N-body simulations of the matter power spectrum, incorporating massive neutrinos in the range Mν= 0.15–0.6 eV, probing the non-linear regime at scales k < 10 h Mpc−1…
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The BAHAMAS project: Calibrated hydrodynamical simulations for large-scale structure cosmology
The evolution of the large-scale distribution of matter is sensitive to a variety of fundamental parameters that characterise the dark matter, dark energy, and other aspects of our cosmological…
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The impact of galactic feedback on the circumgalactic medium
Galactic feedback strongly affects the way galactic environments are enriched. We examine this connection by performing a suite of cosmological hydrodynamic simulations, exploring a range of…
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Implications of an extended dark energy cosmology with massive neutrinos for cosmological tensions
We perform a comprehensive analysis of the most common early- and late-Universe solutions to the $H_0$, Ly-$\alpha$, and $S_8$ discrepancies. When considered on their own, massive neutrinos provide a…
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The BAHAMAS project : the CMB-large-scale structure tension and the roles of massive neutrinos and galaxy formation
Recent studies have presented evidence for tension between the constraints on Omega_m and sigma_8 from the cosmic microwave background (CMB) and measurements of large-scale structure (LSS). This…
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An efficient implementation of massive neutrinos in non-linear structure formation simulations
Massive neutrinos make up a fraction of the dark matter, but due to their large thermal velocities, cluster signicantly less than cold dark matter (CDM) on small scales. An accurate theoretical…
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Stochastic Gravitational-Wave Background due to Primordial Binary Black Hole Mergers.
TLDR
The stochastic background arising from the incoherent superposition of such primordial binary black hole systems in the Universe is computed and it is concluded that constraining the dark matter component in the form of black holes using stochastically gravitational-wave background measurements will be very challenging.
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