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9 papers · 2 filters
Monte-Carlo Analysis of Big Bang Production of Beryllium and Boron
David Thomas
There is continued interest in the possibility that big bang nucleosynthesis may produce significant quantities of Be and B. In this paper we reevaluate the primordial abundances t…
Another Flattened Dark Halo: Plar Ring Galaxy A0136-0801
Penny D. Sackett, Richard W. Pogge
Knowledge of the shape of dark matter halos is critical to our understanding of galaxy formation, dynamics, and of the nature of dark matter itself. Polar ring galaxies (PRGs) ---…
Big Bang Nucleosynthesis: Consistency Or Crisis ?
Gary Steigman
The early, hot, dense, expanding Universe was a primordial reactor in which the light nuclides D, 3He, 4He and 7Li were synthesized in astrophysically interesting abundances. The c…
Globular Clusters in the Magellanic Clouds.II: IR-Array Photometry for 12 Globulars and Contributions to the Integrated Cluster Light
F. R. Ferraro, F. Fusi Pecci, V. Testa +4
We report the results of the observations in the JHK bands of 12 globular clusters in the LMC, and present CMDs down to K=16 for about 450 stars. We merge the data with the BV ones…
Microlensing Events: End of the Dark Halo?
Andrew Gould
I obtain an upper limit for the optical depth to microlensing toward Baade's Window of by assuming that all of the mass of the Galaxy interior to the Sun (and not…
When Can Non-Gaussian Density Fields Produce a Gaussian Sachs-Wolfe Effect?
Robert J. Scherrer, Robert K. Schaefer
The Sachs-Wolfe temperature fluctuations produced by primordial density perturbations are proportional to the potential field ϕ, which is a weighted integral over the density field…