Abstract Preface; 1. Introduction; 2. Properties of globular clusters; 3. The galactic globular
cluster system; 4. Globular cluster systems in nearby galaxies; 5. Properties of extragalactic …

We present a compilation of Cepheid distance moduli and data for four secondary distance
indicators that employ stars in the old stellar populations: the planetary nebula luminosity …

We present new HST/WFPC2 (V, I) photometry for the red-giant stars in NGC 5128 at a
projected distance of 8 kpc from the galaxy center, which probe a mixture of its inner halo …

Faint z∼ 5 quasars with M 1450∼− 23 mag are known to be potentially important
contributors to the ultraviolet ionizing background in the postreionization era. However, their …

As the first step to determine disk mass-to-light ratios for normal spiral galaxies, we present
the results of an imaging survey for planetary nebulae (PNe) in six nearby, face-on systems …

Abstract Using the Hubble Space Telescope (HST) Wide Field Camera (WFC) of the
Advanced Camera for Surveys (ACS), we have obtained deep (V, I) photometry of an outer …

We have used the Wide Field Planetary Camera 2 on the Hubble Space Telescope to obtain
deep F814W images of a blank field in the Virgo Cluster located 41 &arcmin; northwest of …

We have conducted a wide-field CCD-mosaic study of the resolved red giant branch stars of
M31, in a field located 20 kpc from the nucleus along the southeast minor axis. In our (I, VI) …

We present the results of a wide-field imaging survey of the periphery of the Milky Way
globular cluster NGC 7089 (M2). Data were obtained with MegaCam on the Magellan Clay …

We report the discovery of an ultra-faint stellar system in the constellation of Pegasus. This
concentration of stars was detected by applying our overdensity detection algorithm to the …