The scatter, residual correlations and curvature of the sparc baryonic Tully–Fisher relation

Desmond, Harry

doi:10.1093/mnrasl/slx134

The scatter, residual correlations and curvature of the sparc baryonic Tully–Fisher relation

Journal Article · Tue Aug 22 00:00:00 EDT 2017 · Monthly Notices of the Royal Astronomical Society: Letters

DOI:https://doi.org/10.1093/mnrasl/slx134· OSTI ID:1463307

^[1]

Stanford Univ., CA (United States). Kavli Inst. for Particle Astrophysics and Cosmology, Physics Dept.; SLAC National Accelerator Lab., Menlo Park, CA (United States)

In recent work, Lelli et al. argue that the tightness of the baryonic Tully–Fisher relation (BTFR) of the SPARC galaxy sample, and the weakness of the correlation of its residuals with effective radius, pose challenges to Λ cold dark matter cosmology. Here in this Letter, we calculate the statistical significance of these results in the framework of halo abundance matching, which imposes a canonical galaxy–halo connection. Taking full account of sample variance among SPARC-like realizations of the parent halo population, we find the scatter in the predicted BTFR to be 3.6σ too high, but the correlation of its residuals with galaxy size to be naturally weak. Furthermore, we find abundance matching to generate BTFR curvature in 3.0σ disagreement with the data, and a fraction of galaxies with non-flat rotation curves somewhat larger than observed.

View Accepted Manuscript (DOE)

Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1463307

Journal Information:: Monthly Notices of the Royal Astronomical Society: Letters, Journal Name: Monthly Notices of the Royal Astronomical Society: Letters Journal Issue: 1 Vol. 472; ISSN 1745-3925

Publisher:: Royal Astronomical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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A new line on the wide binary test of gravity Banik, Indranil arXiv https://doi.org/10.48550/arxiv.1902.01857	text	January 2019
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