Reconciling the Diversity and Uniformity of Galactic Rotation Curves with Self-Interacting Dark Matter
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 exp...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2019-08-01
|
| Series: | Physical Review X |
| Online Access: | http://doi.org/10.1103/PhysRevX.9.031020 |
| _version_ | 1818718936015831040 |
|---|---|
| author | Tao Ren Anna Kwa Manoj Kaplinghat Hai-Bo Yu |
| author_facet | Tao Ren Anna Kwa Manoj Kaplinghat Hai-Bo Yu |
| author_sort | Tao Ren |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-17T19:58:58Z |
| format | Article |
| id | doaj.art-c38810bb703844afb921c89abaebeab8 |
| institution | Directory Open Access Journal |
| issn | 2160-3308 |
| language | English |
| last_indexed | 2024-12-17T19:58:58Z |
| publishDate | 2019-08-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review X |
| spelling | doaj.art-c38810bb703844afb921c89abaebeab82022-12-21T21:34:31ZengAmerican Physical SocietyPhysical Review X2160-33082019-08-019303102010.1103/PhysRevX.9.031020Reconciling the Diversity and Uniformity of Galactic Rotation Curves with Self-Interacting Dark MatterTao RenAnna KwaManoj KaplinghatHai-Bo YuGalactic 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.http://doi.org/10.1103/PhysRevX.9.031020 |
| spellingShingle | Tao Ren Anna Kwa Manoj Kaplinghat Hai-Bo Yu Reconciling the Diversity and Uniformity of Galactic Rotation Curves with Self-Interacting Dark Matter Physical Review X |
| title | Reconciling the Diversity and Uniformity of Galactic Rotation Curves with Self-Interacting Dark Matter |
| title_full | Reconciling the Diversity and Uniformity of Galactic Rotation Curves with Self-Interacting Dark Matter |
| title_fullStr | Reconciling the Diversity and Uniformity of Galactic Rotation Curves with Self-Interacting Dark Matter |
| title_full_unstemmed | Reconciling the Diversity and Uniformity of Galactic Rotation Curves with Self-Interacting Dark Matter |
| title_short | Reconciling the Diversity and Uniformity of Galactic Rotation Curves with Self-Interacting Dark Matter |
| title_sort | reconciling the diversity and uniformity of galactic rotation curves with self interacting dark matter |
| url | http://doi.org/10.1103/PhysRevX.9.031020 |
| work_keys_str_mv | AT taoren reconcilingthediversityanduniformityofgalacticrotationcurveswithselfinteractingdarkmatter AT annakwa reconcilingthediversityanduniformityofgalacticrotationcurveswithselfinteractingdarkmatter AT manojkaplinghat reconcilingthediversityanduniformityofgalacticrotationcurveswithselfinteractingdarkmatter AT haiboyu reconcilingthediversityanduniformityofgalacticrotationcurveswithselfinteractingdarkmatter |