4.2k citations · 53.7k across the 547 of their papers we have counts for
11 papers · 2 filters
The Connection Between Jets, Accretion Disks, and Black Hole Mass in Blazars
Jian-Min Wang, Bin Luo, Luis C. Ho
The properties of relativistic radio jets are thought to be closely connected with the properties of accretion disks in active galactic nuclei. We explore this issue using a sample…
The Stellar Populations in the Central Parsecs of Galactic Bulges Central Stellar Populations
Marc Sarzi, Hans-Walter Rix, Joseph C. Shields +5
We present Hubble Space Telescope blue spectra at intermediate spectral resolution for the nuclei of 23 nearby disk galaxies. These objects were selected to have nebular emission i…
The Survey of Nearby Nuclei with STIS (SUNNS):Emission-Line Nuclei at Hubble Space Telescope Resolution
Joseph C. Shields, Hans-Walter Rix, Marc Sarzi +6
We present results from a program of optical spectroscopy for 23 nearby galaxy emission-line nuclei. This investigation takes advantage of the spatial resolution of the Hubble Spac…
Intermediate-mass Black Holes in Galactic Nuclei
J. E. Greene, L. C. Ho, A. J. Barth
We present the first homogeneous sample of intermediate-mass black hole candidates in active galactic nuclei. Starting with broad-line active nuclei from the Sloan Digital Sky Surv…
A Population of Massive Globular Clusters in NGC 5128
Paul Martini, Luis C. Ho
We present velocity dispersion measurements of 14 globular clusters in NGC 5128 (Centarus A) obtained with the MIKE echelle spectrograph on the 6.5m Magellan Clay telescope. These…
Black Hole Mass Determinations From Orbit Superposition Models are Reliable
Douglas Richstone, Karl Gebhardt, Monique Aller +13
We show that orbit-superposition dynamical models (Schwarzschild's method) provide reliable estimates of nuclear black hole masses and errors when constructed from adequate orbit l…
The Nuclei of Late-type Spiral Galaxies
T. Boeker, C. -J. Walcher, H. -W. Rix +8
We summarize some recent results from our observational campaign to study the central regions of spiral galaxies of late Hubble type (Scd - Sm). These disk-dominated, bulgeless gal…
POX 52: A Dwarf Seyfert 1 Galaxy With An Intermediate-Mass Black Hole
A. J. Barth, L. C. Ho, R. E. Rutledge +1
We describe new optical images and spectra of POX 52, a dwarf galaxy with an active nucleus that was originally detected in the POX objective-prism survey. While POX 52 was origina…
What Can We Learn from Nearby AGNs?
Luis C. Ho
This contribution reviews the properties of nuclear activity in nearby galaxies, with emphasis on their implications for the demography of nuclear black holes and the nature of acc…
Black Hole Demography from Nearby Active Galactic Nuclei
Luis C. Ho
A significant fraction of local galaxies show evidence of nuclear activity. I argue that the bulk of this activity, while energetically not remarkable, derives from accretion onto…
The Carnegie Observatories Astrophysics Series
Luis C. Ho
On the occasion of the Centennial of the Carnegie Institution of Washington, Carnegie Observatories held a series of four astrophysics symposia in Pasadena from October 2002 to Feb…