Reconciling the Diversity and Uniformity of Galactic Rotation Curves with Self-Interacting Dark Matter
| العنوان: | Reconciling the Diversity and Uniformity of Galactic Rotation Curves with Self-Interacting Dark Matter |
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| المؤلفون: | Hai-Bo Yu, Manoj Kaplinghat, Anna Kwa, Tao Ren |
| المصدر: | Physical Review X, Vol 9, Iss 3, p 031020 (2019) |
| بيانات النشر: | American Physical Society, 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Cosmology and Nongalactic Astrophysics (astro-ph.CO), Structure formation, QC1-999, Dark matter, FOS: Physical sciences, General Physics and Astronomy, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, 010305 fluids & plasmas, symbols.namesake, High Energy Physics - Phenomenology (hep-ph), 0103 physical sciences, Planck, 010306 general physics, Galaxy rotation curve, Astrophysics::Galaxy Astrophysics, Physics, Self-interacting dark matter, Astrophysics - Astrophysics of Galaxies, Galaxy, Modified Newtonian dynamics, High Energy Physics - Phenomenology, Astrophysics of Galaxies (astro-ph.GA), symbols, Halo, Astrophysics - Cosmology and Nongalactic Astrophysics |
| الوصف: | 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 ($3.6 \mu m$) ratios scatter around $0.5 M_\odot/L_\odot$, as expected from population synthesis models, leading to a tight radial acceleration relation and baryonic Tully-Fisher relation. The inferred stellar-halo mass relation is consistent with the expectations from abundance matching. These results indicate that the inner dark matter halos of galaxies are thermalized due to the self-interactions of dark matter particles. Comment: Main text: 10 pages and 3 figures. Supplementary Materials: 47 pages, 2 tables and 5 figures including detailed fits to 135 galaxies |
| اللغة: | English |
| تدمد: | 2160-3308 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6980321a26be82446bff379ed78153daTest https://doaj.org/article/c38810bb703844afb921c89abaebeab8Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....6980321a26be82446bff379ed78153da |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 21603308 |
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