2021
DOI: 10.48550/arxiv.2102.06874
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Improving NASA/IPAC Extragalactic Database Redshift Calculations

Anthony Carr,
Tamara Davis

Abstract: The NASA/IPAC Extragalactic Database (NED) is an impressive tool for finding near-exhaustive information on millions of astrophysical objects. Here we outline a small systematic error that occurs in NED because a low-redshift approximation is used when making the correction from redshifts in the heliocentric frame to the cosmic microwave background (CMB) rest frame. It means that historically NED systematically misreported the values of CMB-frame redshifts by up to ∼ 10 −3 z (about 0.001 at redshift of 1). Whi… Show more

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