Search

Now showing items 1-10 of 11

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 ...

Orbit-Based Dynamical Models Of The Sombrero Galaxy (NGC 4594)

Jardel, John R.; Gebhardt, Karl; Shen, Juntai T.; Fisher, David B.; Kormendy, John; Kinzler, Jeffry; Lauer, Tod R.; Richstone, Douglas; Gultekin, Kayhan (2011-09)

We present axisymmetric, orbit-based models to study the central black hole (BH), stellarmass-to-light ratio (M/L), and dark matter (DM) halo of NGC 4594 (M104, the Sombrero Galaxy). For stellar kinematics, we use published ...

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 ...

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 ...

Is There A Black Hole In NGC 4382?

Gultekin, Kayhan; Richstone, Douglas O.; Gebhardt, Karl; Faber, S. M.; Lauer, Tod R.; Bender, Ralf; Kormendy, John; Pinkney, Jason (2011-11)

We present Hubble Space Telescope (HST) Space Telescope Imaging Spectrograph observations of the galaxy NGC 4382 (M85) and axisymmetric models of the galaxy to determine mass-to-light ratio (Gamma(V)) and central black ...

Hobby-Eberly Telescope Observations Of The Dark Halo In NGC 821

Forestell, Amy D.; Gebhardt, Karl (2010-06)

We present stellar line-of-sight velocity distributions (LOSVDs) of elliptical galaxy NGC 821 obtained to approximately 100 '' (over two effective radii) with long-slit spectroscopy from the Hobby-Eberly Telescope. Our ...

The Dark Matter Density Profile Of The Fornax Dwarf

Jardel, John R.; Gebhardt, Karl (2012-02)

We construct axisymmetric Schwarzschild models to measure the mass profile of the Local Group dwarf galaxy Fornax. These models require no assumptions to be made about the orbital anisotropy of the stars, as is the case ...

Angular Momenta, Dynamical Masses, And Mergers Of Brightest Cluster Galaxies

Tran, Kim-Vy; Brough, Sarah; Gebhardt, Karl; von der Linden, Anja; Couch, Warrick J.; Sharp, Rob (2013-12)

Using the VIMOS integral field unit (IFU) spectrograph on the Very Large Telescope, we have spatially mapped the kinematic properties of 10 nearby brightest cluster galaxies (BCGs) and 4 BCG companion galaxies located ...

The Central Dark Matter Distribution Of NGC 2976

Adams, Joshua J.; Gebhardt, Karl; Blanc, Guillermo A.; Fabricius, Maximilian H.; Hill, Gary J.; Murphy, Jeremy D.; van den Bosch, Remco C. E.; van de Ven, Glenn (2012-01)

We study the mass distribution in the late-type dwarf galaxy NGC 2976 through stellar kinematics obtained with the Visible Integral Field ReplicableUnit Spectrograph Prototype and anisotropic Jeans models as a test of ...