An improved Tully-Fisher estimate of $H_0$

Understand

We propose an improved comprehensive method for determining the Hubble constant ($H_0$) using the Tully-Fisher relation.

• By fitting a peculiar velocity model in conjunction with the Tully-Fisher relation, all available data can be used to derive self-consistent Tully-Fisher parameters.
• In comparison to previous approaches, our method offers several improvements: it can be readily generalised to different forms of the Tully-Fisher relation and its intrinsic scatter; it uses a peculiar velocity model to predict distances more accurately; it can account for all selection effects; it uses the entire dataset to fit the Tully-Fisher relation; and it is fully self-consistent.
• The Tully-Fisher relation zero-point is calibrated using the subset of galaxies with distances from absolute distance indicators.