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The Space Density of Compton-thick AGN
E. Treister, C. M. Urry, C. Cardamone +3
We constrain the number density and evolution of Compton-thick Active Galactic Nuclei (AGN), and their contribution to the extragalactic X-ray background. In the local Universe we…
The SAURON project XVI: On the Sources of Ionisation for the Gas in Elliptical and Lenticular Galaxies
Marc Sarzi, Joseph C. Shields, Kevin Schawinski +16
Following our study on the incidence, morphology and kinematics of the ionised gas in early-type galaxies we now address the question of what is powering the observed nebular emiss…
Heavily Obscured AGN in Star-Forming Galaxies at z~2
E. Treister, C. Cardamone, K. Schawinski +10
We study the properties of a sample of 211 heavily-obscured Active Galactic Nucleus (AGN) candidates in the Extended Chandra Deep Field-South selecting objects with f_24/f_R>1000 a…
Galaxy Zoo: Passive Red Spirals
Karen L. Masters, Moein Mosleh, A. Kathy Romer +14
We study the spectroscopic properties and environments of red spiral galaxies found by the Galaxy Zoo project. By carefully selecting face-on, disk dominated spirals we construct a…
Galaxy Zoo: Exploring the Motivations of Citizen Science Volunteers
M. Jordan Raddick, Georgia Bracey, Pamela L. Gay +5
The Galaxy Zoo citizen science website invites anyone with an Internet connection to participate in research by classifying galaxies from the Sloan Digital Sky Survey. As of April…
The role of AGN in the migration of early-type galaxies from the blue cloud to the red sequence
Kevin Schawinski
We present a general picture of the ongoing formation and evolution of early-type galaxies via a specific evolutionary sequence starting in the blue cloud and ending in the low-mas…