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5 papers · 2 filters
Semilocal Cosmic String Networks
A. Achucarro, P. Salmi, J. Urrestilla
We report on a large scale numerical study of networks of semilocal cosmic strings in flat space in the parameter regime in which they are perturbatively stable. We find a populati…
Mesolensing: I. High Probability Lensing Without Large Optical Depth
Rosanne Di Stefano
In a variety of astronomical situations, there is a relatively high probability that a single isolated lens will produce a detectable event. The high probability is caused by some…
An Unusual Spectral State of an Ultra-luminous Very Soft X-ray Source during Outburst
A. K. H. Kong, R. Di Stefano
We report the results of Chandra and XMM-Newton observations of a new outburst of an ultra-luminous X-ray source in M101. During a Chandra monitoring observation of M101, M101 ULX-…
Tracking Dark Energy with the ISW effect: short and long-term predictions
Levon Pogosian, Pier Stefano Corasaniti, Christian Stephan-Otto +2
We present an analysis of the constraining power of future measurements of the Integrated Sachs-Wolfe (ISW) effect on models of the equation of state of dark energy as a function o…
Bounds on Cosmic Strings from WMAP and SDSS
Mark Wyman, Levon Pogosian, Ira Wasserman
We find the constraints from WMAP and SDSS data on the fraction of cosmological fluctuations sourced by local cosmic strings using a Markov Chain Monte Carlo (MCMC) analysis. In ad…