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Probing the Galactic Halo with Globular Cluster Tidal Tails
Carl J. Grillmair
We discuss recent observational and numerical work on tidal tails in globular clusters. Evidence of tidal tails has now been found in 16 Galactic globulars and 4 globulars in M31.…
Stellar Populations in Three Outer Fields of the LMC
Marla C. Geha, Jon A. Holtzman, Jeremy R. Mould +16
We present HST photometry for three fields in the outer disk of the LMC extending approximately four magnitudes below the faintest main sequence turnoff. We cannot detect any stron…
Keck Spectroscopy of Globular Clusters around NGC 1399
Markus Kissler-Patig, Jean P. Brodie, Linda L. Schroder +3
We report moderate resolution, high signal-to-noise spectroscopy of globular clusters around NGC 1399, the central cD galaxy in the Fornax cluster. We address issues as diverse as…
HST Imaging of the Globular Clusters in the Fornax Cluster: NGC 1379
Rebecca A. W. Elson, Carl J. Grillmair, Duncan A. Forbes +3
We present B and I photometry for ~300 globular cluster candidates in NGC 1379, an E0 galaxy in the Fornax Cluster. Our data are from both Hubble Space Telescope (HST) and ground-b…
Hubble Space Telescope Observations of the Draco Dwarf Spheroidal
Carl. J. Grillmair, Jeremy R. Mould, Jon A. Holtzman +15
We present an F606W-F814W color-magnitude diagram for the Draco dwarf spheroidal galaxy based on Hubble Space Telescope WFPC2 images. The luminosity function is well-sampled to 3 m…
The Demography of Massive Dark Objects in Galaxy Centres
John Magorrian, Scott Tremaine, Douglas Richstone +9
We construct dynamical models for a sample of 36 nearby galaxies with Hubble Space Telescope photometry and ground-based kinematics. The models assume that each galaxy is axisymmet…
HST Imaging of the Globular Clusters in the Fornax Cluster: NGC 1399 and NGC 1404
Duncan Forbes, Carl Grillmair, Gerard Williger +2
The Fornax cluster galaxies NGC 1399 and NGC 1404 are ideal for studying the effects of a cluster environment on globular cluster systems. Here we present new optical imaging of th…
Spectroscopic Evidence for a Supermassive Black Hole in NGC 4486B
John Kormendy, Ralf Bender, John Magorrian +7
The stellar kinematics of the dwarf elliptical galaxy NGC 4486B have been measured in seeing sigma_* = .22 arcsec with the Canada-France-Hawaii Telescope. Lauer et al. 1996, ApJ, 4…
On the Origin of Globular Cluster Systems in Elliptical and cD Galaxies
Duncan A. Forbes, Jean P. Brodie, Carl Grillmair
Perhaps the most noteworthy of recent findings in extragalactic globular cluster (GC) research are the multimodal GC metallicity distributions seen in massive early-type galaxies.…
Globular Clusters in the Sombrero Galaxy (NGC 4594)
Duncan A. Forbes, Carl J. Grillmair, R. Chris Smith
The Sombrero galaxy, NGC 4594, contains the most numerous globular cluster system of any nearby spiral. It is an ideal candidate in which to study the globular clusters and contras…