6 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Universe"  
Results: 1 - 6
open access

The Age of the Universe: Concordance

Description: Arguments on the Age of the Universe, t{sub u}, are reviewed. The four independent age determination techniques are: dynamics (Hubble Age and deceleration); oldest stars (globular clusters); radioactive dating (nucleocosmochronology); and white dwarf cooling (age of the disk). While discussing all four, this review will concentrate more on nucleocosmochronology due in part to recent possible controversies there. It is shown that all four techniques are in general agreement, which is an independ… more
Date: December 1, 1989
Creator: Schramm, D. N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

An analytic treatment for a model of superclustering in the universe

Description: Recently, Weinberg, Ostriker, and Dekel (WOD) have proposed a model of many spherical explosions which reproduces the large scale structure of the universe quite well. Because of the success of the model, we have developed an analytic treatment which gives the cluster-cluster correlation function and the cluster mass distribution in terms of the distribution of radii of the spherical voids. We also derive an expression for the distribution in terms of the cluster mass distribution. Thus, the cl… more
Date: January 1, 1989
Creator: Kulsrud, R.M. & Cowley, S.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Quantum theory and the emergence of patterns in the universe

Description: The topic of this symposium is the quest to discover, define, and interpret patterns in the universe. This quest has two parts. To discover and define these patterns is the task of science: this part of the quest is producing a copious flow of reliable information. To interpret or give meaning to these patterns is the task of natural philosophy: this part has not kept pace.
Date: November 1, 1989
Creator: Stapp, H. P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The Inevitable Universe---Parker-Rhodes' peculiar mixture of ontology and physics

Description: When asked to give a lecture on Parker-Rhodes' physics, I was somewhat non-plused. I almost replied What physics '' --- a point of view that Frederick expresses himself more than once in the book he was working on when he died. But that would be unjust. Whatever his view, I assert that the discovery of the Combinational Hierarchy is one of the most important discoveries'' --- or whatever you want to call it --- in physics made in this century. His calculation of the proton-electron mass ratio i… more
Date: December 1, 1989
Creator: Noyes, H. P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Small scale structure on cosmic strings

Description: I discuss our current understanding of cosmic string evolution, and focus on the question of small scale structure on strings, where most of the disagreements lie. I present a physical picture designed to put the role of the small scale structure into more intuitive terms. In this picture one can see how the small scale structure can feed back in a major way on the overall scaling solution. I also argue that it is easy for small scale numerical errors to feed back in just such a way. The intuit… more
Date: October 30, 1989
Creator: Albrecht, Andreas
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Evolution of cosmic string networks

Description: We summarize our new results on cosmic strings. These results include: the application of non-equilibrium statistical mechanics to cosmic string evolution, a simple ''one scale'' model for the long strings which has a great deal of predictive power, results from large scale numerical simulations, and a discussion of the observational consequences of our results. An upper bond on G/mu/ of approximately 10/sup /minus/7/ emerges from the millisecond pulsar gravity wave bound. We discuss how numeri… more
Date: June 1, 1989
Creator: Albrecht, Andreas & Turok, Neil
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen