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Submillimetre galaxies in a hierarchical universe: number counts, redshift distribution, and implications for the IMF
Christopher C. Hayward, Desika Narayanan, Dušan Kereš +4
High-redshift submillimetre galaxies (SMGs) are some of the most rapidly star-forming galaxies in the Universe. Historically, galaxy formation models have had difficulty explaining…
Modeling Mid-Infrared Diagnostics of Obscured Quasars and Starbursts
Gregory F. Snyder, Christopher C. Hayward, Anna Sajina +5
We analyze the link between active galactic nuclei (AGN) and mid-infrared flux using dust radiative transfer calculations of starbursts realized in hydrodynamical simulations. Focu…
Moving mesh cosmology: properties of neutral hydrogen in absorption
Simeon Bird, Mark Vogelsberger, Debora Sijacki +3
We examine the distribution of neutral hydrogen in cosmological simulations carried out with the new moving-mesh code AREPO and compare it with the corresponding GADGET simulations…
A Simple Model for the Density Profiles of Isolated Dark Matter Halos
Eli Visbal, Abraham Loeb, Lars Hernquist
We explore the possibility that the density profiles of elliptical galaxies and cold dark matter (CDM) halos found in cosmological simulations can be understood in terms of the sam…
Star Formation in Galaxy Mergers with Realistic Models of Stellar Feedback & the Interstellar Medium
Philip F. Hopkins, Thomas J. Cox, Lars Hernquist +3
We use simulations with realistic models for stellar feedback to study galaxy mergers. These high resolution (1 pc) simulations follow formation and destruction of individual GMCs…
The Origin of the Microlensing Events Observed Towards the LMC and the Stellar Counterpart of the Magellanic Stream
Gurtina Besla, Lars Hernquist, Abraham Loeb
We introduce a novel theoretical model to explain the long-standing puzzle of the nature of the microlensing events reported towards the Large Magellanic Cloud (LMC) by the MACHO a…
Self-Perpetuating Spiral Arms in Disk Galaxies
Elena D'Onghia, Mark Vogelsberger, Lars Hernquist
The causes of spiral structure in galaxies remain uncertain. Leaving aside the grand bisymmetric spirals with their own well-known complications, here we consider the possibility t…
Multi-Dimensional, Compressible Viscous Flow on a Moving Voronoi Mesh
Diego Muñoz, Volker Springel, Robert Marcus +2
Numerous formulations of finite volume schemes for the Euler and Navier-Stokes equations exist, but in the majority of cases they have been developed for structured and stationary…
How to distinguish starbursts and quiescently star-forming galaxies: The `bimodal' submillimetre galaxy population as a case study
Christopher C. Hayward, Patrik Jonsson, Dušan Kereš +3
In recent work (arXiv:1101.0002) we have suggested that the high-redshift (z ~ 2-4) bright submillimetre galaxy (SMG) population is heterogeneous, with major mergers contributing b…
The Role of Dwarf Galaxy Interactions in Shaping the Magellanic System and Implications for Magellanic Irregulars
Gurtina Besla, Nitya Kallivayalil, Lars Hernquist +3
We present a novel pair of numerical models of the interaction history between the Large and Small Magellanic Clouds (LMC and SMC, respectively) and our Milky Way (MW) in light of…