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High-Velocity Clouds: Building Blocks of the Local Group
We suggest that the high-velocity clouds (HVCs) are large clouds, with typical diameters of 25 kpc, containing 3×107 M☉ of neutral gas and 3×108 M☉ of dark matter, falling onto the Local Group;Expand
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The Star Formation Rate Function for Redshift z ~ 4-7 Galaxies: Evidence for a Uniform Buildup of Star-forming Galaxies during the First 3 Gyr of Cosmic Time
We combine recent estimates of dust extinction at z ~ 4-7 with UV luminosity function (LF) determinations to derive star formation rate (SFR) functions at z ~ 4-7. SFR functions provide a moreExpand
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Particle Clumping and Planetesimal Formation Depend Strongly on Metallicity
We present three-dimensional numerical simulations of particle clumping and planetesimal formation in protoplanetary disks with varying amounts of solid material. As centimeter-size pebbles settle toExpand
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Trigonometric parallaxes of 6.7 GHz methanol masers
Aims. Emission from the 6.7 GHz methanol maser transition is very strong, is relatively stable, has small internal motions, and is observed toward numerous massive star-forming regions in the Galaxy.Expand
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The Advanced Camera for Surveys (ACS) Fornax Cluster Survey is a Hubble Space Telescope program to image 43 early-type galaxies in the Fornax cluster, using the F475W and F850LP bandpasses of theExpand
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The diversity of methanol maser morphologies from VLBI observations
Context. The 6.7 GHz methanol maser marks an early stage of high-mass star formation, but the origin of this maser is currently a matter of debate. In particular it is unclear whether the maserExpand
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The APOSTLE simulations: solutions to the Local Group's cosmic puzzles
The Local Group of galaxies offer some of the most discriminating tests of models of cosmic structure formation. For example, observations of the Milky Way (MW) and Andromeda satellite populationsExpand
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Optical to near-infrared transit observations of super-Earth GJ 1214b: water-world or mini-Neptune?
Context. GJ1214b, the 6.55 Earth-mass transiting planet recently discovered by the MEarth team, has a mean density of∼35% of that of the Earth. It is thought that this planet is either a mini-NExpand
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Properties of gas in and around galaxy haloes
We study the properties of gas inside and around galaxy haloes as a function of radius and halo mass, focusing mostly on z= 2, but also showing some results for z= 0. For this purpose, we use a suiteExpand
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The chosen few: the low-mass haloes that host faint galaxies
Since reionization prevents star formation in most halos below 3 x 10^9 solar masses, dwarf galaxies only populate a fraction of existing dark matter halos. We use hydrodynamic cosmologicalExpand
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