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An Improved Distance to NGC 4258 and its Implications for the Hubble Constant

By M. Reid and others
NGC 4258 is a critical galaxy for establishing the extragalactic distance scale and estimating the Hubble constant (Ho). Water masers in the nucleus of the galaxy orbit about its supermassive black hole, and very long baseline interferometric observations of their positions, velocities, and accelerations can be modeled to give a... Show more
November 18, 2019
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An Improved Distance to NGC 4258 and its Implications for the Hubble Constant
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