POLARBEAR detects B-modes in the cosmic microwave background

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“The detection is a sign that this cosmic light has been warped by intervening structures in the universe.”

Read more in Astronomy Magazine | article provided by University of California , UC San Diego:


POLARBEAR detects curls in the universe’s oldest light.

Cosmologists have made the most sensitive and precise measurements yet of the polarization of the cosmic microwave background. The report marks an early success for POLARBEAR, a collaboration of more than 70 scientists using a telescope high in Chile’s Atacama desert designed to capture the universe’s oldest light. “It’s a really important milestone,” said Kam Arnold from the University of California, in San Diego. “We’re in a new regime of more powerful, precision cosmology.” POLARBEAR measures remnant radiation from the Big Bang, which has cooled and stretched with the expansion of the universe to microwave lengths. This cosmic microwave background (CMB) acts as an enormous backlight, illuminating the large-scale structure of the universe and carrying an imprint of cosmic history.


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