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Probing dark matter substructure in the gravitational lens HE0435-1223 with the WFC3 grism
A. M. Nierenberg, T. Treu, G. Brammer +7
Strong gravitational lensing provides a powerful test of Cold Dark Matter (CDM) as it enables the detection and mass measurement of low mass haloes even if they do not contain bary…
The Circumnuclear Star Formation Environment of NGC 6946: Br-gamma and H2 Results from Keck Integral Field Spectroscopy
Chao-Wei Tsai, Jean L. Turner, Sara C. Beck +2
We present a 3-dimensional data cube of the K band continuum and the Br-gamma, H2 S(0) and S(1) lines within the central 18.5" x 13.8" (520 pc x 390 pc) region of NGC 6946. Data we…
NIR imaging spectroscopy of the inner few arcseconds of NGC 4151 with OSIRIS at Keck
Christof Iserlohe, Alfred Krabbe, James E. Larkin +5
We present H- and K-band data from the inner arcsecond of the Seyfert 1.5 galaxy NGC 4151 obtained with the adaptive optics assisted near-infrared imaging field spectrograph OSIRIS…
Dynamical Measurements of Black Hole Masses in Four Brightest Cluster Galaxies at 100 Mpc
Nicholas J. McConnell, Chung-Pei Ma, Jeremy D. Murphy +5
We present stellar kinematics and orbit superposition models for the central regions of four Brightest Cluster Galaxies (BCGs), based upon integral-field spectroscopy at Gemini, Ke…
Two ten-billion-solar-mass black holes at the centres of giant elliptical galaxies
Nicholas J. McConnell, Chung-Pei Ma, Karl Gebhardt +5
Observational work conducted over the last few decades indicates that all massive galaxies have supermassive black holes at their centres. Although the luminosities and brightness…
The Black Hole Mass in Brightest Cluster Galaxy NGC 6086
Nicholas J. McConnell, Chung-Pei Ma, James R. Graham +4
We present the first direct measurement of the central black hole mass, M_BH, in NGC 6086, the Brightest Cluster Galaxy (BCG) in Abell 2162. Our investigation demonstrates for the…