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The Black Hole Mass In M87 From Gemini/NIFS Adaptive Optics Observations

Gebhardt, Karl; Adams, Joshua; Richstone, Douglas; Lauer, Tod R.; Faber, S. M.; Gultekin, Kayhan; Murphy, Jeremy; Tremaine, Scott (2011-03)

We present the stellar kinematics in the central 2 '' of the luminous elliptical galaxy M87 (NGC 4486), using laser adaptive optics to feed the Gemini telescope integral-field spectrograph, Near-infrared Integral Field ...

Dynamical Measurements Of Black Hole Masses In Four Brightest Cluster Galaxies At 100 Mpc

McConnell, Nicholas J.; Ma, Chung-Pei; Murphy, Jeremy D.; Gebhardt, Karl; Lauer, Tod R.; Graham, James R.; Wright, Shelley A.; Richstone, Douglas O. (2012-09)

We present stellar kinematics and orbit superposition models for the central regions of four brightest cluster galaxies, based upon integral-field spectroscopy at Gemini, Keck, and McDonald Observatories. Our integral-field ...

The Black Hole Mass, Stellar Mass-To-Light Ratio, And Dark Halo In M87

Gebhardt, Karl; Thomas, Jens (2009-08)

We model the dynamical structure of M87 (NGC4486) using high spatial resolution long-slit observations of stellar light in the central regions, two-dimensional stellar light kinematics out to half of the effective radius, ...

The Black Hole Mass In The Brightest Cluster Galaxy NGC 6086

McConnell, Nicholas J.; Ma, Chung-Pei; Graham, James R.; Gebhardt, Karl; Lauer, Tod R.; Wright, Shelley A.; Richstone, Douglas O. (2011-02)

We present the first direct measurement of the central black hole mass, M-center dot, in NGC 6086, the Brightest Cluster Galaxy (BCG) in A2162. Our investigation demonstrates for the first time that stellar-dynamical ...

Beyond The Brim Of The Hat: Kinematics Of Globular Clusters Out To Large Radii In The Sombrero Galaxy

Dowell, Jessica L.; Rhode, Katherine L.; Bridges, Terry J.; Zepf, Stephen E.; Gebhardt, Karl; Freeman, Ken C.; de Boer, Elizabeth Wylie (2014-06)

We have obtained radial velocity measurements for 51 new globular clusters around the Sombrero galaxy. These measurements were obtained using spectroscopic observations from the AAOmega spectrograph on the Anglo-Australian ...

Hunting for Supermassive Black Holes in Nearby Galaxies With the Hobby-Eberly Telescope

van den Bosch, Remco C. E.; Gebhardt, Karl; Gultekin, Kayhan; Yildirim, Akin; Walsh, Jonelle L. (2015-05)

We have conducted an optical long-slit spectroscopic survey of 1022 galaxies using the 10 m Hobby-Eberly Telescope (HET) at McDonald Observatory. The main goal of the HET Massive Galaxy Survey (HETMGS) is to find nearby ...

Galaxy Kinematics With Virus-P: The Dark Matter Halo Of M87

Murphy, Jeremy D.; Gebhardt, Karl; Adams, Joshua J. (2011-03)

We present two-dimensional stellar kinematics of M87 out to R = 238 '' taken with the integral field spectrograph VIRUS-P. We run a large set of axisymmetric, orbit-based dynamical models and find clear evidence for a ...

Hydrostatic Gas Constraints On Supermassive Black Hole Masses: Implications For Hydrostatic Equilibrium And Dynamical Modeling In A Sample Of Early-Type Galaxies

Humphrey, Phillip J.; Buote, David A.; Brighenti, Fabrizio; Gebhardt, Karl; Mathews, William G. (2009-10)

We present new mass measurements for the supermassive black holes (SMBHs) in the centers of three early-type galaxies. The gas pressure in the surrounding, hot interstellar medium (ISM) is measured through spatially resolved ...

Dark Matter Scaling Relations And The Assembly Epoch Of Coma Early-Type Galaxies

Thomas, Jens; Saglia, R. P.; Bender, Ralf; Thomas, D.; Gebhardt, Karl; Magorrian, John; Corsini, E. M.; Wegner, G. (2009-01)

Axisymmetric, orbit-based dynamical models are used to derive dark matter scaling relations for Coma early-type galaxies. From faint to bright galaxies, halo core radii and asymptotic circular velocities increase. Compared ...

The Rising Stellar Velocity Dispersion Of M87 From Integrated Starlight

Murphy, Jeremy D.; Gebhardt, Karl; Cradit, Mason (2014-04)

We have measured the line-of-sight velocity distribution from integrated stellar light at two points in the outer halo of M87 (NGC 4486), the second-rank galaxy in the Virgo Cluster. The data were taken at R = 480 '' ...