Zobrazeno 1 - 10
of 85
pro vyhledávání: '"Richstone, Douglas O."'
Autor:
Gültekin, Kayhan, Gebhardt, Karl, Kormendy, John, Foord, Adi, Bender, Ralf, Lauer, Tod R., Pinkney, Jason, Richstone, Douglas O., Tremaine, Scott
We present IR photometry and HST imaging and spectroscopy of Sab galaxy NGC 4826. Schwarzschild dynamical modeling is used to measure its central black hole mass $M$. Photometric decomposition is used to enable a comparison of $M$ to published scalin
Externí odkaz:
http://arxiv.org/abs/2409.11575
Autor:
Walsh, Jonelle L., Bosch, Remco C. E. van den, Gebhardt, Karl, Yıldırım, Akın, Gültekin, Kayhan, Husemann, Bernd, Richstone, Douglas O.
Mrk 1216 is a nearby, early-type galaxy with a small effective radius of 2.8 kpc and a large stellar velocity dispersion of 308 km/s for its K-band luminosity of 1.4x10^11 L_sun. Using integral-field spectroscopy assisted by adaptive optics from Gemi
Externí odkaz:
http://arxiv.org/abs/1612.02015
Autor:
Walsh, Jonelle L., Bosch, Remco C. E. van den, Gebhardt, Karl, Yıldırım, Akın, Richstone, Douglas O., Gültekin, Kayhan, Husemann, Bernd
The nearby lenticular galaxy NGC 1277 is thought to host one of the largest black holes known, however the black hole mass measurement is based on low spatial resolution spectroscopy. In this paper, we present Gemini Near-infrared Integral Field Spec
Externí odkaz:
http://arxiv.org/abs/1511.04455
Autor:
Walsh, Jonelle L., Bosch, Remco C. E. van den, Gebhardt, Karl, Yıldırım, Akın, Gültekin, Kayhan, Husemann, Bernd, Richstone, Douglas O.
Located in the Perseus cluster, NGC 1271 is an early-type galaxy with a small effective radius of 2.2 kpc and a large stellar velocity dispersion of 276 km/s for its K-band luminosity of 8.9x10^{10} L_sun. We present a mass measurement for the black
Externí odkaz:
http://arxiv.org/abs/1506.05129
Autor:
Gültekin, Kayhan, Gebhardt, Karl, Kormendy, John, Lauer, Tod R., Bender, Ralf, Tremaine, Scott, Richstone, Douglas O.
We determine the mass of the nuclear black hole ($M$) in NGC 3706, an early type galaxy with a central surface brightness minimum arising from an apparent stellar ring, which is misaligned with respect to the galaxy's major axis at larger radii. We f
Externí odkaz:
http://arxiv.org/abs/1312.4799
Autor:
McConnell, Nicholas J., Ma, Chung-Pei, Murphy, Jeremy D., Gebhardt, Karl, Lauer, Tod R., Graham, James R., Wright, Shelley A., Richstone, Douglas O.
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, Keck, and McDonald Observatories. Our integral-field data span radii fro
Externí odkaz:
http://arxiv.org/abs/1203.1620
Autor:
Gultekin, Kayhan, Cackett, Edward M., Miller, Jon M., Di Matteo, Tiziana, Markoff, Sera, Richstone, Douglas O.
We present Chandra observations of 12 galaxies that contain supermassive black holes with dynamical mass measurements. Each galaxy was observed for 30 ksec and resulted in a total of 68 point source detections in the target galaxies including superma
Externí odkaz:
http://arxiv.org/abs/1202.3147
Autor:
McConnell, Nicholas J., Ma, Chung-Pei, Gebhardt, Karl, Wright, Shelley A., Murphy, Jeremy D., Lauer, Tod R., Graham, James R., Richstone, Douglas O.
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 fluctuations of quasars in the early Universe suggest that some are po
Externí odkaz:
http://arxiv.org/abs/1112.1078
Autor:
Gultekin, Kayhan, Richstone, Douglas O., Gebhardt, Karl, Faber, S. M., Lauer, Tod R., Bender, Ralf, Kormendy, John, Pinkney, Jason
We present HST STIS observations of the galaxy NGC 4382 (M85) and axisymmetric models of the galaxy to determine mass-to-light ration (M/L, V-band) and central black hole mass (M_BH). We find M/L = 3.74 +/- 0.1 (solar units) and M_BH = 1.3 (+5.2, -1.
Externí odkaz:
http://arxiv.org/abs/1108.1808
We examine the possibility that the observed relation between black-hole mass and host-galaxy stellar velocity dispersion (the M-sigma relation) is biased by an observational selection effect, the difficulty of detecting a black hole whose sphere of
Externí odkaz:
http://arxiv.org/abs/1106.1079