[extropy-chat] WMAP Results - Cosmology Makes Sense

Amara Graps amara at amara.com
Sun Mar 19 19:33:47 UTC 2006

A few days old news, but still important :-)  See a discussion,
with links to more details on the cosmic variance blog:

"WMAP Results- Cosmology Makes Sense!"


# Here is the power spectrum: amount of anisotropy as a function of
angular scale (really multipole moment l), with large scales on the
left and smaller scales on the right. The major difference between
this and the first-year release is that several points that used to
not really fit the theoretical curve are now, with more data and
better analysis, in excellent agreement with the predictions of the
conventional LambdaCDM model. That's a universe that is spatially
flat and made of baryons, cold dark matter, and dark energy.

# The best-fit universe has approximately 4% baryons, 22% dark
matter, and 74% dark energy, once you combine WMAP with data from
other sources. The matter density is a tiny bit low, although
including other data from weak lensing surveys brings it up closer
to 30% total. All in all, nice consistency with what we already



Amara Graps, PhD          email: amara at amara.com
Computational Physics     vita:  ftp://ftp.amara.com/pub/resume.txt
Multiplex Answers         URL:   http://www.amara.com/
"The universe is big: it doesn't fit in one viewgraph."
-- Carlos Frenk [showing the VIRGO Consortium Hubble volume simulation]

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