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Evidence for dark matter contraction and a Salpeter IMF in a massive early-type galaxy
Alessandro Sonnenfeld, Tommaso Treu, Raphael Gavazzi +5
Stars and dark matter account for most of the mass of early-type galaxies, but uncertainties in the stellar population and the dark matter profile make it challenging to distinguis…
The Lick AGN Monitoring Project 2011: Reverberation Mapping of Markarian 50
A. J. Barth, A. Pancoast, S. J. Thorman +46
The Lick AGN Monitoring Project 2011 observing campaign was carried out over the course of 11 weeks in Spring 2011. Here we present the first results from this program, a measureme…
The Galaxy Zoo survey for giant AGN-ionized clouds: past and present black-hole accretion events
William C. Keel, S. Drew Chojnowski, Vardha N. Bennert +8
Some active galactic nuclei (AGN) are surrounded by extended emission-line regions (EELRs), which trace both the illumination pattern of escaping radiation and its history over the…
Direct Measurements of the magnification produced by galaxy clusters as gravitational lenses
Alessandro Sonnenfeld, Giuseppe Bertin, Marco Lombardi
Weak lensing is one of the best available diagnostic tools to measure the total density profiles of distant clusters of galaxies. Unfortunately, it suffers from the well-known mass…
Broad-Line Reverberation in the Kepler-Field Seyfert Galaxy Zw 229-015
A. J. Barth, M. L. Nguyen, M. A. Malkan +45
The Seyfert 1 galaxy Zw 229-015 is among the brightest active galaxies being monitored by the Kepler mission. In order to determine the black hole mass in Zw 229-015 from H-beta re…