Journals of the American Physical Society - Possibility of observing the evolution of the cosmic microwave background

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January 2008, to be published in Physical Review D15

Possibility of observing the evolution of the cosmic microwave background
Adam Moss, James P. Zibin, and Douglas Scott

Most cosmological parameters are expected to change significantly only on cosmological time scales, but given the large amount of information contained within the Cosmic Microwave Background (CMB) sky, we can expect that changes in the CMB should be observable on much shorter time scales. Here we quantify this expectation, examining the detectability of the dominant effects on short time scales. We find that an ideal future experiment with currently achievable sensitivity could detect the changing dipole due to our galactic motion in about 5 years, but that it would take around 4000 years to detect a change in the higher order multipoles.

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