PerspectiveAstronomy

Next Steps for Cosmology

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Science  09 May 2014:
Vol. 344, Issue 6184, pp. 586-588
DOI: 10.1126/science.1252724

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  1. Different distortion signals.

    The “fingerprint” from the recombination era is produced some 260,000 years (hydrogen), 130,000 years (neutral helium), and 18,000 years (ionized helium) after the Big Bang (11). Today these lines are redshifted by more than a factor of 1000 and are visible in the CMB. The primordial µ, y, and residual (non-µ/non-y) distortions arose through interactions of photons and electrons after energy release 2 months after the beginning of the universe.

    CREDIT: JENS CHLUBA