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67 papers · 2 filters
Sgr A* ``Visual Binaries'': A Direct Measurement of the Galactocentric Distance
Samir Salim, Andrew Gould
We present a new geometrical method for measuring the distance to the Galactic center (R_0) by solving for the Keplerian orbit of individual stars bound to the black hole associate…
A Brief History of Star Formation and Chemical Enrichment in the Bulge of the Milky Way
Jay A. Frogel
Observations of the stellar content of the bulge of the Milky Way can provide critical guidelines for the interpretation of observations of distant galaxies, in particular for unde…
Reionization of the Inhomogeneous Universe
Jordi Miralda-Escude, Martin Haehnelt, Martin J. Rees
A model of the density distribution in the intergalactic medium, motivated by that found in numerical simulations, is used to demonstrate the effect of a clumpy IGM and discrete so…
Locally Biased Galaxy Formation and Large Scale Structure
Vijay K. Narayanan, Andreas Berlind, David H. Weinberg
We examine the influence of the morphology-density(MD) relation and a wide range of simple models for biased galaxy formation on statistical measures of large scale structure. We c…
A Review of Line and Continuum Correlations in AGNs
Patrick S. Osmer, Joseph C. Shields
This review addresses the current observational status of the Baldwin Effect (BE), an empirical anti-correlation between emission line equivalent width and source luminosity for ac…
Microlensing in the Small Magellanic Cloud: Lessons from an N-body Simulation
David S. Graff, Lance T. Gardiner
We analyse an N-body simulation of the Small Magellanic Cloud (SMC), that of Gardiner & Noguchi (1996) to determine its microlensing statistics. We find that the optical depth due…