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Diffuse Extragalactic Background Radiation
Joel R. Primack, Rudy C. Gilmore, Rachel S. Somerville
Attenuation of high--energy gamma rays by pair--production with UV, optical and IR background photons provides a link between the history of galaxy formation and high--energy astro…
Modeling Gamma-Ray Attenuation in High-Redshift GeV Spectra
Rudy C. Gilmore, Piero Madau, Joel R. Primack +1
We present two models for the cosmological UV background light, and calculate the opacity of GeV gamma--rays out to redshift 9. The contributors to the background include 2 possibl…
Galaxy Merger Morphologies and Time-Scales from Simulations of Equal-Mass Gas-Rich Disc Mergers
Jennifer M. Lotz, Patrik Jonsson, T. J. Cox +1
A key obstacle to understanding the galaxy merger rate and its role in galaxy evolution is the difficulty in constraining the merger properties and time-scales from instantaneous s…
The role of AGN in the colour transformation of galaxies at redshifts z~1
A. Georgakakis, K. Nandra, R. Yan +10
We explore the role of AGN in establishing and/or maintaining the bimodal colour distribution of galaxies by quenching their star-formation and hence, causing their transition from…
Predicting the Properties of the Remnants of Dissipative Galaxy Mergers
M. Covington, A. Dekel, T. J. Cox +2
We construct a physically motivated model for predicting the properties of the remnants of gaseous galaxy mergers, given the properties of the progenitors and the orbit. The model…
AEGIS: New Evidence Linking Active Galactic Nuclei to the Quenching of Star Formation
Kevin Bundy, Antonis Georgakakis, Kirpal Nandra +10
Utilizing Chandra X-ray observations in the All-wavelength Extended Groth Strip International Survey (AEGIS) we identify 241 X-ray selected Active Galactic Nuclei (AGNs, L > 10^{42…