Galaxy Rotation Curves and Universal Scaling Relations: Comparison between Phenomenological and Fermionic Dark Matter Profiles
Galaxies show different halo scaling relations such as the radial acceleration relation, the mass discrepancy acceleration relation (MDAR), or the dark matter (DM) surface density relation. At difference with traditional studies using phenomenological ΛCDM halos, we analyze the above relations assum...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/acb8bd |
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| author | A. Krut C. R. Argüelles P.-H. Chavanis J. A. Rueda R. Ruffini |
| author_facet | A. Krut C. R. Argüelles P.-H. Chavanis J. A. Rueda R. Ruffini |
| author_sort | A. Krut |
| collection | DOAJ |
| description | Galaxies show different halo scaling relations such as the radial acceleration relation, the mass discrepancy acceleration relation (MDAR), or the dark matter (DM) surface density relation. At difference with traditional studies using phenomenological ΛCDM halos, we analyze the above relations assuming that DM halos are formed through a maximum entropy principle (MEP) in which the fermionic (quantum) nature of the DM particles is dully accounted for. For the first time, a competitive DM model based on first physical principles, such as (quantum) statistical-mechanics and thermodynamics, is tested against a large data set of galactic observables. In particular, we compare the fermionic DM model with empirical DM profiles: the Navarro–Frenk–White (NFW) model, a generalized NFW model accounting for baryonic feedback, the Einasto model, and the Burkert model. For this task, we use a large sample of 120 galaxies taken from the Spitzer Photometry and Accurate Rotation Curves data set, from which we infer the DM content to compare with the models. We find that the radial acceleration relation and MDAR are well explained by all the models with comparable accuracy, while the fits to the individual rotation curves, in contrast, show that cored DM halos are statistically preferred with respect to the cuspy NFW profile. However, very different physical principles justify the flat inner-halo slope in the most-favored DM profiles: while generalized NFW or Einasto models rely on complex baryonic feedback processes, the MEP scenario involves a quasi-thermodynamic equilibrium of the DM particles. |
| first_indexed | 2024-03-12T04:42:54Z |
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| id | doaj.art-6467f9ace48646feb0f5c518b5ed629d |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-12T04:42:54Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-6467f9ace48646feb0f5c518b5ed629d2023-09-03T09:30:40ZengIOP PublishingThe Astrophysical Journal1538-43572023-01-019451110.3847/1538-4357/acb8bdGalaxy Rotation Curves and Universal Scaling Relations: Comparison between Phenomenological and Fermionic Dark Matter ProfilesA. Krut0C. R. Argüelles1P.-H. Chavanis2J. A. Rueda3https://orcid.org/0000-0003-4904-0014R. Ruffini4https://orcid.org/0000-0003-0829-8318ICRANet , Piazza della Repubblica 10, I-65122 Pescara, Italy ; carguelles@fcaglp.unlp.edu.ar, andreas.krut@icranet.orgICRANet , Piazza della Repubblica 10, I-65122 Pescara, Italy ; carguelles@fcaglp.unlp.edu.ar, andreas.krut@icranet.org; Instituto de Astrofísica de La Plata , UNLP-CONICET, Paseo del Bosque s/n B1900FWA La Plata, ArgentinaLaboratoire de Physique Théorique, Université de Toulouse , CNRS, UPS, FranceICRANet , Piazza della Repubblica 10, I-65122 Pescara, Italy ; carguelles@fcaglp.unlp.edu.ar, andreas.krut@icranet.org; Dip. di Fisica, Sapienza Universitá di Roma , Piazzale Aldo Moro 5, I-00185 Rome, Italy; ICRANet-Ferrara, Dip. di Fisica e Scienze della Terra, Università degli Studi di Ferrara , Via Saragat 1, I-44122 Ferrara, Italy; INAF , Istituto de Astrofisica e Planetologia Spaziali, Via Fosso del Cavaliere 100, I-00133 Rome, ItalyICRANet , Piazza della Repubblica 10, I-65122 Pescara, Italy ; carguelles@fcaglp.unlp.edu.ar, andreas.krut@icranet.org; Dip. di Fisica, Sapienza Universitá di Roma , Piazzale Aldo Moro 5, I-00185 Rome, Italy; ICRANet-Ferrara, Dip. di Fisica e Scienze della Terra, Università degli Studi di Ferrara , Via Saragat 1, I-44122 Ferrara, Italy; INAF , Istituto de Astrofisica e Planetologia Spaziali, Via Fosso del Cavaliere 100, I-00133 Rome, ItalyGalaxies show different halo scaling relations such as the radial acceleration relation, the mass discrepancy acceleration relation (MDAR), or the dark matter (DM) surface density relation. At difference with traditional studies using phenomenological ΛCDM halos, we analyze the above relations assuming that DM halos are formed through a maximum entropy principle (MEP) in which the fermionic (quantum) nature of the DM particles is dully accounted for. For the first time, a competitive DM model based on first physical principles, such as (quantum) statistical-mechanics and thermodynamics, is tested against a large data set of galactic observables. In particular, we compare the fermionic DM model with empirical DM profiles: the Navarro–Frenk–White (NFW) model, a generalized NFW model accounting for baryonic feedback, the Einasto model, and the Burkert model. For this task, we use a large sample of 120 galaxies taken from the Spitzer Photometry and Accurate Rotation Curves data set, from which we infer the DM content to compare with the models. We find that the radial acceleration relation and MDAR are well explained by all the models with comparable accuracy, while the fits to the individual rotation curves, in contrast, show that cored DM halos are statistically preferred with respect to the cuspy NFW profile. However, very different physical principles justify the flat inner-halo slope in the most-favored DM profiles: while generalized NFW or Einasto models rely on complex baryonic feedback processes, the MEP scenario involves a quasi-thermodynamic equilibrium of the DM particles.https://doi.org/10.3847/1538-4357/acb8bdGalaxy dynamicsGalaxy structureGalaxy physicsDark matterGalaxy dark matter halos |
| spellingShingle | A. Krut C. R. Argüelles P.-H. Chavanis J. A. Rueda R. Ruffini Galaxy Rotation Curves and Universal Scaling Relations: Comparison between Phenomenological and Fermionic Dark Matter Profiles The Astrophysical Journal Galaxy dynamics Galaxy structure Galaxy physics Dark matter Galaxy dark matter halos |
| title | Galaxy Rotation Curves and Universal Scaling Relations: Comparison between Phenomenological and Fermionic Dark Matter Profiles |
| title_full | Galaxy Rotation Curves and Universal Scaling Relations: Comparison between Phenomenological and Fermionic Dark Matter Profiles |
| title_fullStr | Galaxy Rotation Curves and Universal Scaling Relations: Comparison between Phenomenological and Fermionic Dark Matter Profiles |
| title_full_unstemmed | Galaxy Rotation Curves and Universal Scaling Relations: Comparison between Phenomenological and Fermionic Dark Matter Profiles |
| title_short | Galaxy Rotation Curves and Universal Scaling Relations: Comparison between Phenomenological and Fermionic Dark Matter Profiles |
| title_sort | galaxy rotation curves and universal scaling relations comparison between phenomenological and fermionic dark matter profiles |
| topic | Galaxy dynamics Galaxy structure Galaxy physics Dark matter Galaxy dark matter halos |
| url | https://doi.org/10.3847/1538-4357/acb8bd |
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