Reconciling the Diversity and Uniformity of Galactic Rotation Curves with Self-Interacting Dark Matter
Abstract
Galactic rotation curves exhibit diverse behavior in the inner regions while obeying an organizing principle; i.e., they can be approximately described by a radial acceleration relation or the modified Newtonian dynamics phenomenology. We analyze the rotation curve data from the SPARC sample and explicitly demonstrate that both the diversity and uniformity are naturally reproduced in a hierarchical structure formation model with the addition of dark matter self-interactions. The required concentrations of the dark matter halos are fully consistent with the concentration-mass relation predicted by the Planck cosmological model. The inferred stellar mass-to-light ( ) ratios scatter around , as expected from population synthesis models, leading to a tight radial acceleration relation and a baryonic Tully-Fisher relation. The inferred stellar-halo mass relation is consistent with the expectations from abundance matching. These results provide compelling arguments in favor of the idea that the inner halos of galaxies are thermalized due to dark matter self-interactions.
- Authors:
- Publication Date:
- Research Org.:
- Univ. of California, Riverside, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1547992
- Alternate Identifier(s):
- OSTI ID: 1611075
- Grant/Contract Number:
- SC0008541
- Resource Type:
- Published Article
- Journal Name:
- Physical Review. X
- Additional Journal Information:
- Journal Name: Physical Review. X Journal Volume: 9 Journal Issue: 3; Journal ID: ISSN 2160-3308
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Physics
Citation Formats
Ren, Tao, Kwa, Anna, Kaplinghat, Manoj, and Yu, Hai-Bo. Reconciling the Diversity and Uniformity of Galactic Rotation Curves with Self-Interacting Dark Matter. United States: N. p., 2019.
Web. doi:10.1103/PhysRevX.9.031020.
Ren, Tao, Kwa, Anna, Kaplinghat, Manoj, & Yu, Hai-Bo. Reconciling the Diversity and Uniformity of Galactic Rotation Curves with Self-Interacting Dark Matter. United States. https://doi.org/10.1103/PhysRevX.9.031020
Ren, Tao, Kwa, Anna, Kaplinghat, Manoj, and Yu, Hai-Bo. Wed .
"Reconciling the Diversity and Uniformity of Galactic Rotation Curves with Self-Interacting Dark Matter". United States. https://doi.org/10.1103/PhysRevX.9.031020.
@article{osti_1547992,
title = {Reconciling the Diversity and Uniformity of Galactic Rotation Curves with Self-Interacting Dark Matter},
author = {Ren, Tao and Kwa, Anna and Kaplinghat, Manoj and Yu, Hai-Bo},
abstractNote = {Galactic rotation curves exhibit diverse behavior in the inner regions while obeying an organizing principle; i.e., they can be approximately described by a radial acceleration relation or the modified Newtonian dynamics phenomenology. We analyze the rotation curve data from the SPARC sample and explicitly demonstrate that both the diversity and uniformity are naturally reproduced in a hierarchical structure formation model with the addition of dark matter self-interactions. The required concentrations of the dark matter halos are fully consistent with the concentration-mass relation predicted by the Planck cosmological model. The inferred stellar mass-to-light (3.6 μm) ratios scatter around 0.5 M⊙/L⊙, as expected from population synthesis models, leading to a tight radial acceleration relation and a baryonic Tully-Fisher relation. The inferred stellar-halo mass relation is consistent with the expectations from abundance matching. These results provide compelling arguments in favor of the idea that the inner halos of galaxies are thermalized due to dark matter self-interactions.},
doi = {10.1103/PhysRevX.9.031020},
journal = {Physical Review. X},
number = 3,
volume = 9,
place = {United States},
year = {2019},
month = {8}
}
https://doi.org/10.1103/PhysRevX.9.031020
Web of Science
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