From an observatory high above the Atacama Desert in Chile, astronomers get a fresh look at the oldest light in the universe.
Their observations, plus a little bit of cosmic geometry, suggest that Universe It is 13.77 billion years old – more or less 40 million years. A researcher from Cornell University co-authored one of two research papers on the findings, adding a new twist to the ongoing debate. Astrophysics social communication.
The new estimate, using data collected at the National Science Foundation’s Atacama Cosmology Telescope, matches the estimate provided by the Standard Model of the Universe, as well as measurements of the same light made by the European Space Agency’s Planck satellite, which measured the remnants of the Big Bang from 2009 to 2013.
The research has been published in Journal of Cosmology and Astrophysics.
The lead author of “The Atacama Cosmology Telescope: A Measure of the Cosmic Microwave Background Power Spectra at 98 and 150 GHz” is Steve Choi, a postdoctoral fellow at NSF and astrophysics at the Cornell Center for Astrophysics and Planetary Sciences, College of Arts and Sciences.
In 2019, a research team measuring the motions of galaxies estimated that the universe is hundreds of millions of years smaller than the Planck team expected. This discrepancy indicated that a new model for the universe might be needed and raised concerns that one of the sets of measurements might be incorrect.
“We have now come to an answer that Planck and ACT agree on,” said Simon Ayola, a researcher at the Flatiron Institute’s Center for Computational Astrophysics and first author of one of two papers. “It speaks to the fact that these difficult measurements are reliable.”
Steve K. Choi et al, Atacama Cosmology Telescope: Measuring spectra of the cosmic microwave background energy at 98 and 150 GHz, Journal of Cosmology and Astrophysics (2020). DOI: 10.1088 / 1475-7516 / 2020/12/045
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