# The baryonic Tully-Fisher relation for different velocity definitions and implications for galaxy angular momentum

@inproceedings{Lelli2019TheBT, title={The baryonic Tully-Fisher relation for different velocity definitions and implications for galaxy angular momentum}, author={Federico Lelli and Stacy S. McGaugh and James M. Schombert and Harry Desmond and Harley Katz European Southern Observatory and Case Western Reserve University and University of Oregon and University of Oxford}, year={2019} }

We study the baryonic Tully–Fisher relation (BTFR) at z ≃ 0 using 153 galaxies from the Spitzer Photometry and Accurate Rotation Curve sample. We consider different definitions of the characteristic velocity from H I and H α rotation curves, as well as H I line-widths from single-dish observations. We reach the following results: (1) The tightest BTFR is given by the mean velocity along the flat part of the rotation curve. The orthogonal intrinsic scatter is extremely small (∼6 per cent) and… CONTINUE READING

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