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WMAP 5-year data: Let’s test Inflation

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dc.contributor.author Halpern, Mark
dc.date.accessioned 2008-04-18T17:09:41Z
dc.date.available 2008-04-18T17:09:41Z
dc.date.issued 2008-04-18T17:09:41Z
dc.identifier.uri http://hdl.handle.net/2429/730
dc.description.abstract We have released maps and data for five years of observation of the cosmic microwave background with the Wilkinson Microwave Anisotropy Probe (WMAP) and I will review the main results in this talk. A simple 6 parameter cosmological model continues to be an excellent fit to the CMB data and to our data in conjunction with other astrophysical measurements. In particular a running spectral index is not supported by the data, and constraints that the Universe is spatially flat have increased in precision. Increased sensitivity and improvements in our understanding of the instrumental beam shape have allowed us to measure for the first time a cosmic neutrino background. Neutrinos de-coupled from other matter earlier than photons did. While they are expected to have a 2 Kelvin thermal distribution today, they comprised 10% of the energy density of the Universe at the epoch of photon de-coupling. The data also allow tighter constraints on the shape of the inflationary potential via the amplitude of a gravitational wave background new constraints on features of cosmic axions. Recorded at TRIUMF on Thursday April 17, 2008. en
dc.format.extent 72689815 bytes
dc.format.extent 2624772 bytes
dc.format.mimetype application/octet-stream
dc.format.mimetype application/pdf
dc.language.iso eng en
dc.subject WMAP en
dc.subject inflation en
dc.subject Wilkinson microwave anisotropy probe en
dc.subject cosmic microwave background en
dc.subject ΛCDM model en
dc.subject lambda CDM en
dc.subject beam shape en
dc.subject baryons en
dc.subject Baryon Acoustic Oscillations en
dc.subject Gravitational radiation en
dc.subject cosmic neutrion background en
dc.subject podcast
dc.subject Science and Engineering Library
dc.title WMAP 5-year data: Let’s test Inflation en
dc.type still image en
dc.type sound en
dc.type.text Other en
dc.description.affiliation Physics and Astronomy, Dept of en
dc.description.reviewstatus en
dc.rights.copyright Mark Halpern en


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