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ta66505477
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How can people measure the Hubble's constant using WMAP?
I found a journal named First-Year Wilkinson Microwave Anisotropy Probe (WMAP)* Observations: Determination of Cosmological Parameters
http://iopscience.iop.org/0067-0049/148/1/175
In 4.1 said
CMB observations do not directly measure the local expansion rate of the Universe rather they
measure the conformal distance to the decoupling surface and the matter-radiation ratio through the amplitude of the early Integrated Sachs Wolfe (ISW) contribution relative to the height of the first peak.
I feel confusing why I cannot get the Hubble's constant directly from WMAP? (but the people always say they can get all the parameters in WMAP)
I am only a year three student and do not have much cosmology background.
I found a journal named First-Year Wilkinson Microwave Anisotropy Probe (WMAP)* Observations: Determination of Cosmological Parameters
http://iopscience.iop.org/0067-0049/148/1/175
In 4.1 said
CMB observations do not directly measure the local expansion rate of the Universe rather they
measure the conformal distance to the decoupling surface and the matter-radiation ratio through the amplitude of the early Integrated Sachs Wolfe (ISW) contribution relative to the height of the first peak.
I feel confusing why I cannot get the Hubble's constant directly from WMAP? (but the people always say they can get all the parameters in WMAP)
I am only a year three student and do not have much cosmology background.