The isocurvature fraction after WMAP 3-yr data
نویسندگان
چکیده
منابع مشابه
The isocurvature fraction after WMAP 3-yr data
I revisit the question of the adiabaticity of initial conditions for cosmological perturbations in view of the 3-yr Wilkinson Microwave Anisotropy Probe (WMAP) data. I focus on the simplest alternative to purely adiabatic conditions, namely a superposition of the adiabatic mode and one of the three possible isocurvature modes, with the same spectral index as the adiabatic component. I discuss f...
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I revisit the question of the adiabaticity of initial conditions for cosmological perturbations in view of the 3–year WMAP data. I focus on the simplest alternative to pure adiabatic conditions, namely a superposition of the adiabatic mode and one of the 3 possible isocurvature modes, with the same spectral index as the adiabatic component. I discuss findings in terms of posterior bounds on the...
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We present constraints on the presence of isocurvature modes from the temperature and polarization CMB spectrum data from the WMAP satellite alone, and in combination with other datasets including SDSS galaxy survey and SNLS supernovae. We find that the inclusion of polarization data allows the WMAP data alone, as well as in combination with complementary observations, to place improved limits ...
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Inflationary cosmology, a period of accelerated expansion in the early universe, is being tested by Cosmic Microwave Background measurements. Generic predictions of inflation have been shown to be correct, and in addition individual models are being tested. The model of Natural Inflation is examined in light of recent 3-year data from the Wilkinson Microwave Anisotropy Probe and shown to provid...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society: Letters
سال: 2007
ISSN: 1745-3925,1745-3933
DOI: 10.1111/j.1745-3933.2006.00268.x