WMAP - Second Release |
WMAP - Second Release |
Sep 1 2005, 03:39 PM
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#1
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Member Group: Members Posts: 235 Joined: 2-August 05 Member No.: 451 |
Some discussion of the yet to be released WMAP Second Data Release has been going on elsewhere on this forum. I've created this thread as a better labelled place for such discussion.
I have been writing that the second release is overdue, and that there are some hints that there are unexpected things that have contaminated the first release data. Others have pointed out that the data is not clear and needs a lot of time to resolve. |
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Mar 23 2006, 04:03 PM
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#2
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Senior Member Group: Members Posts: 2454 Joined: 8-July 05 From: NGC 5907 Member No.: 430 |
Paper: astro-ph/0603589
Date: Wed, 22 Mar 2006 20:38:09 GMT (9kb) Title: Limits on SUSY GUTs and Defects Formation in Hybrid Inflationary Models with Three-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations Authors: Aur\'elien A. Fraisse (Princeton University) Comments: 10 pages, 2 tables \\ We confront the predicted effects of hybrid inflationary models on the Cosmic Microwave Background (CMB) with three years of Wilkinson Microwave Anisotropy Probe (WMAP) observations. Using model selection, we compare the ability of a simple flat power-law LCDM model to describe the data to hybrid inflationary models involving global or local cosmic strings, or global textures. We find that it is statistically impossible to distinguish between these models: they all give a similar description of the data, the maximum ratio of the various evidences involved being never higher than e^{0.1 \pm 0.5}. We then derive the maximum contribution that topological defects can make to the CMB, and place an upper bound on the possible value of cosmic strings tension of G\mu \leq 2.1 \times 10^{-7} (68% CL). Finally, we give the corresponding constraints on the strings and D-strings masses, as well as limits on the D- and F-term coupling constants (\kappa and \lambda) and mass scales (M and \sqrt{\xi}). \\ ( http://arXiv.org/abs/astro-ph/0603589 , 9kb) -------------------- "After having some business dealings with men, I am occasionally chagrined,
and feel as if I had done some wrong, and it is hard to forget the ugly circumstance. I see that such intercourse long continued would make one thoroughly prosaic, hard, and coarse. But the longest intercourse with Nature, though in her rudest moods, does not thus harden and make coarse. A hard, sensible man whom we liken to a rock is indeed much harder than a rock. From hard, coarse, insensible men with whom I have no sympathy, I go to commune with the rocks, whose hearts are comparatively soft." - Henry David Thoreau, November 15, 1853 |
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