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H2O Megamaser Cosmology with the ngVLA

Published onMay 31, 2019
H2O Megamaser Cosmology with the ngVLA
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Abstract

A local measurement of the Hubble Constant at z ≪ 0.5 provides the strongest complement to observations of the CMB for constraining models of dark energy and testing the standard cosmological model. This white paper describes how the ngVLA can contribute to measuring H0 to a precision of one percent using the H2O megamaser method.

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