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60 papers · 1 filter
Cluster AgeS Experiment: The Age and Distance of the Globular Cluster omega Centauri Determined from Observations of the Eclipsing Binary OGLEGC17
I. B. Thompson, J. Kaluzny, W. Pych +5
We use masses, radii, and luminosities of the detached eclipsing binary OGLEGC17 derived from photometric and spectroscopic observations to calculate the age and distance of the gl…
The Interstellar Medium of Star-forming Irregular Galaxies: The View with ISO
D. Hunter, M. Kaufman, D. Hollenbach +8
We present mid-infrared imaging and far-infrared (FIR) spectroscopy of 5 IBm galaxies observed by ISO as part of our larger study of the inter- stellar medium of galaxies. Most of…
MACHO Project Limits on Black Hole Dark Matter in the 1-30 Solar Mass Range
The Macho collaboration, C. Alcock, R. A. Allsman +22
We report on a search for long duration microlensing events towards the Large Magellanic Cloud. We find none, and therefore put limits on the contribution of high mass objects to t…
Very Low Mass Stars and Brown Dwarfs of the Young Open Cluster IC2391
D. Barrado y Navascués, John R. Stauffer, César Briceño +4
We have identified a large sample of probable low mass members of the young open cluster IC2391 based on optical (VRIZ) and Infrared (JHK) photometry. Our sample includes 50 pr…
A Search for Wolf-Rayet Stars in the Small Magellanic Cloud
Phil Massey, Alaine Duffy
We conducted an extensive search for Wolf-Rayet stars (W-Rs) in the SMC, using the same interference filter imaging techniques that have proved successful in finding W-Rs in more d…
Photometric and Spectroscopic Analysis of Cool White Dwarfs with Trigonometric Parallax Measurements
P. Bergeron, S. K. Leggett, Maria Teresa Ruiz
A photometric and spectroscopic analysis of 152 cool white dwarf stars is presented. The discovery of 7 new DA white dwarfs, 2 new DQ white dwarfs, 1 new magnetic white dwarf, and…