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Cited by 286

The DOI matches its Crossref record; 38 of the 38 references it cites were found in a registry or an index.

THE SMALL SCATTER OF THE BARYONIC TULLY–FISHER RELATION

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Lelli, Federico, McGaugh, Stacy S., Schombert, James M.·2016·The Astrophysical Journal Letters

Abstract

In a Λ cold dark matter (ΛCDM) cosmology, the baryonic Tully–Fisher relation (BTFR) is expected to show significant intrinsic scatter resulting from the mass–concentration relation of dark matter halos and the baryonic-to-halo mass ratio. We study the BTFR using a sample of 118 disk galaxies (spirals and irregulars) with data of the highest quality: extended rotation curves (tracing the outer velocity) and Spitzer photometry at 3.6 μ m (tracing the stellar mass). Assuming that the stellar mass-to-light ratio ( ) is nearly constant at 3.6 μ m, we find that the scatter, slope, and normalization of the BTFR systematically vary with the adopted . The observed scatter is minimized for , corresponding to nearly maximal disks in high-surface-brightness galaxies and BTFR slopes close to ∼4. For any reasonable value of , the intrinsic scatter is ∼0.1 dex, below general ΛCDM expectations. The residuals show no correlations with galaxy structural parameters (radius or surface brightness), contrary to the predictions from some semi-analytic models of galaxy formation. These are fundamental issues for ΛCDM cosmology.

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Metadata

Authors
Lelli, F., McGaugh, S. S., & Schombert, J. M.
Venue
The Astrophysical Journal Letters
Published
2016-01-01
Volume
816
Issue
1
Pages
L14
ISSN
  • 2041-8205 (ISSN-L)
  • 2041-8213
OpenAlex
W2208735541
Cited by
286
References
38
FWCI
13.31
Type
journal article
Language
en
Open access
bronze

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Lelli, F., McGaugh, S. S., & Schombert, J. M. (2016). THE SMALL SCATTER OF THE BARYONIC TULLY–FISHER RELATION. The Astrophysical Journal Letters. https://doi.org/10.3847/2041-8205/816/1/l14

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