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Stars and dark matter in the spiral gravitational lens 2237+0305
C. M. Trott, T. Treu, L. V. E. Koopmans +1
We construct a mass model for the spiral lens galaxy 2237+0305, at redshift z_l=0.04, based on gravitational-lensing constraints, HI rotation, and new stellar-kinematic information…
Enhanced lensing rate by clustering of massive galaxies: newly discovered systems in the SLACS fields
Elisabeth R. Newton, Philip J. Marshall, Tommaso Treu
[Abridged] We exploit the clustering of massive galaxies to perform a high efficiency imaging search for gravitational lenses. Our dataset comprises 44 fields imaged by the Hubble…
First Results from the Lick AGN Monitoring Project: The Mass of the Black Hole in Arp 151
Misty C. Bentz, Jonelle L. Walsh, Aaron J. Barth +24
We have recently completed a 64-night spectroscopic monitoring campaign at the Lick Observatory 3-m Shane telescope with the aim of measuring the masses of the black holes in 13 ne…
The nature of dusty starburst galaxies in a rich cluster at z=0.4: the progenitors of lenticulars?
J. E. Geach, Ian Smail, Sean M. Moran +2
We present the results of a Spitzer Infrared Spectrograph (IRS) survey of 24um-selected luminous infrared galaxies (LIRGs, L_IR > 10^11 L_sun) in the rich cluster Cl0024+16 at z=0.…
Revealing the properties of dark matter in the merging cluster MACSJ0025.4-1222
Maruša Bradač, Steven W. Allen, Tommaso Treu +6
We constrain the physical nature of dark matter using the newly identified massive merging galaxy cluster MACSJ0025.4-1222. As was previously shown by the example of the Bullet Clu…
Mass distribution and orbital anisotropy of early-type galaxies: constraints from the Mass Plane
C. Nipoti, T. Treu, A. S. Bolton
Massive early-type galaxies are observed to lie on the Mass Plane (MP), a two-dimensional manifold in the space of effective radius R_e, projected mass M_p (measured via strong gra…