ar X iv : a st ro - p h / 01 06 38 1 v 1 2 1 Ju n 20 01 A Hidden Nucleus in Cygnus A , but Not in M 87

ar X iv : a st ro - p h / 01 06 38 2 v 1 2 1 Ju n 20 01 Sensitivity of the Astrometric Technique in Detecting Outer Planets

With the advent of optical interferometers that will be coming online in the next decade, radial velocity searches for extra-solar planets will be complemented by high angular resolution astrometric measurements. In this paper, we explore the sensitivity of the astrometric technique, and develop an analytical understanding of the sensitivity in the regime where the orbital period is longer than...

ar X iv : a st ro - p h / 04 06 56 7 v 1 2 4 Ju n 20 04 1

ar X iv : a st ro - p h / 01 06 39 2 v 1 2 1 Ju n 20 01 White Dwarfs : Contributors and Tracers of the Galactic Dark – Matter Halo

We examine the claim by Oppenheimer et al. (2001) that the local halo density of white dwarfs is an order of magnitude higher than previously thought. As it stands, the observational data support the presence of a kinematically distinct population of halo white dwarfs at the >99% confidence level a. A maximum-likelihood analysis gives a radial velocity dispersion of σ h U =160

ar X iv : a st ro - p h / 00 06 29 0 v 1 2 1 Ju n 20 00 Gas Rich Dwarfs from the PSS - II III . H I Profiles and Dynamical Masses

We present Arecibo neutral hydrogen data on a sample of optically selected dwarf galaxies.

ar X iv : a st ro - p h / 06 01 33 7 v 1 1 6 Ja n 20 06 A Radio Pulsar Spinning at 716 Hz Jason

X iv :a st ro -p h/ 06 01 33 7v 1 1 6 Ja n 20 06 A Radio Pulsar Spinning at 716 Hz Jason W. T. Hessels, Scott M. Ransom, Ingrid H. Stairs, Paulo C. C. Freire, Victoria M. Kaspi, and Fernando Camilo Department of Physics, McGill University, Montreal, QC H3A 2T8, Canada NRAO, 520 Edgemont Rd., Charlottesville, VA 22903, USA Department of Physics and Astronomy, University of British Columbia, 6224...