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

Abstract

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.

Authors:
ORCiD logo [1]
  1. Stanford Univ., CA (United States). Kavli Inst. for Particle Astrophysics and Cosmology, Physics Dept.; SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1463307
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Monthly Notices of the Royal Astronomical Society: Letters
Additional Journal Information:
Journal Volume: 472; Journal Issue: 1; Journal ID: ISSN 1745-3925
Publisher:
Royal Astronomical Society
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 79 ASTRONOMY AND ASTROPHYSICS; galaxies: formation; galaxies: fundamental parameters; galaxies: haloes; galaxies: kinematics and dynamics; galaxies: statistics; dark matter

Citation Formats

Desmond, Harry. The scatter, residual correlations and curvature of the sparc baryonic Tully–Fisher relation. United States: N. p., 2017. Web. doi:10.1093/mnrasl/slx134.
Desmond, Harry. The scatter, residual correlations and curvature of the sparc baryonic Tully–Fisher relation. United States. doi:10.1093/mnrasl/slx134.
Desmond, Harry. Tue . "The scatter, residual correlations and curvature of the sparc baryonic Tully–Fisher relation". United States. doi:10.1093/mnrasl/slx134. https://www.osti.gov/servlets/purl/1463307.
@article{osti_1463307,
title = {The scatter, residual correlations and curvature of the sparc baryonic Tully–Fisher relation},
author = {Desmond, Harry},
abstractNote = {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.},
doi = {10.1093/mnrasl/slx134},
journal = {Monthly Notices of the Royal Astronomical Society: Letters},
number = 1,
volume = 472,
place = {United States},
year = {2017},
month = {8}
}

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Cited by: 12 works
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Works referenced in this record:

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    Dark matter–baryon scaling relations from Einasto halo fits to SPARC galaxy rotation curves
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    A new line on the wide binary test of gravity
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    Directly testing gravity with Proxima Centauri
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    Dark matter–baryon scaling relations from Einasto halo fits to SPARC galaxy rotation curves
    journal, March 2019


    The radial acceleration relation and dark baryons in MOND
    journal, May 2019

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    Directly testing gravity with Proxima Centauri
    journal, May 2019

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    A new line on the wide binary test of gravity
    journal, June 2019

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    • DOI: 10.1093/mnras/stz1551