Dark Matter in Fractional Gravity III: Dwarf Galaxies Kinematics
Recently, we put forward a framework where the dark matter (DM) component within virialized halos is subject to a non-local interaction originated by fractional gravity (FG) effects. In previous works, we demonstrated that such a framework can substantially alleviate the small-scale issues of the st...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-11-01
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| Series: | Universe |
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| Online Access: | https://www.mdpi.com/2218-1997/9/11/478 |
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| author | Francesco Benetti Andrea Lapi Giovanni Gandolfi Minahil Adil Butt Yacer Boumechta Balakrishna S. Haridasu Carlo Baccigalupi |
| author_facet | Francesco Benetti Andrea Lapi Giovanni Gandolfi Minahil Adil Butt Yacer Boumechta Balakrishna S. Haridasu Carlo Baccigalupi |
| author_sort | Francesco Benetti |
| collection | DOAJ |
| description | Recently, we put forward a framework where the dark matter (DM) component within virialized halos is subject to a non-local interaction originated by fractional gravity (FG) effects. In previous works, we demonstrated that such a framework can substantially alleviate the small-scale issues of the standard <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi mathvariant="sans-serif">Λ</mi></semantics></math></inline-formula>CDM paradigm, without altering the DM mass profile predicted by <i>N</i>-body simulations, and retaining its successes on large cosmological scales. In this paper, we investigate further, to probe FG via the high-quality data of individual dwarf galaxies, by exploiting the rotation velocity profiles inferred from stellar and gas kinematic measurements in eight dwarf irregulars, and the projected velocity dispersion profiles inferred from the observed dynamics of stellar tracers in seven dwarf spheroidals and in the ultra-diffuse galaxy DragonFly 44. We find that FG can reproduce extremely well the rotation and dispersion curves of the analyzed galaxies, performing in most instances significantly better than the standard Newtonian setup. |
| first_indexed | 2024-03-09T16:24:07Z |
| format | Article |
| id | doaj.art-ebaaa56b3fd14655b3e855073ddea5e8 |
| institution | Directory Open Access Journal |
| issn | 2218-1997 |
| language | English |
| last_indexed | 2024-03-09T16:24:07Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Universe |
| spelling | doaj.art-ebaaa56b3fd14655b3e855073ddea5e82023-11-24T15:09:49ZengMDPI AGUniverse2218-19972023-11-0191147810.3390/universe9110478Dark Matter in Fractional Gravity III: Dwarf Galaxies KinematicsFrancesco Benetti0Andrea Lapi1Giovanni Gandolfi2Minahil Adil Butt3Yacer Boumechta4Balakrishna S. Haridasu5Carlo Baccigalupi6Scuola Internazionale Superiore Studi Avanzati (SISSA), Physics Area, Via Bonomea 265, 34136 Trieste, ItalyScuola Internazionale Superiore Studi Avanzati (SISSA), Physics Area, Via Bonomea 265, 34136 Trieste, ItalyScuola Internazionale Superiore Studi Avanzati (SISSA), Physics Area, Via Bonomea 265, 34136 Trieste, ItalyScuola Internazionale Superiore Studi Avanzati (SISSA), Physics Area, Via Bonomea 265, 34136 Trieste, ItalyScuola Internazionale Superiore Studi Avanzati (SISSA), Physics Area, Via Bonomea 265, 34136 Trieste, ItalyScuola Internazionale Superiore Studi Avanzati (SISSA), Physics Area, Via Bonomea 265, 34136 Trieste, ItalyScuola Internazionale Superiore Studi Avanzati (SISSA), Physics Area, Via Bonomea 265, 34136 Trieste, ItalyRecently, we put forward a framework where the dark matter (DM) component within virialized halos is subject to a non-local interaction originated by fractional gravity (FG) effects. In previous works, we demonstrated that such a framework can substantially alleviate the small-scale issues of the standard <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi mathvariant="sans-serif">Λ</mi></semantics></math></inline-formula>CDM paradigm, without altering the DM mass profile predicted by <i>N</i>-body simulations, and retaining its successes on large cosmological scales. In this paper, we investigate further, to probe FG via the high-quality data of individual dwarf galaxies, by exploiting the rotation velocity profiles inferred from stellar and gas kinematic measurements in eight dwarf irregulars, and the projected velocity dispersion profiles inferred from the observed dynamics of stellar tracers in seven dwarf spheroidals and in the ultra-diffuse galaxy DragonFly 44. We find that FG can reproduce extremely well the rotation and dispersion curves of the analyzed galaxies, performing in most instances significantly better than the standard Newtonian setup.https://www.mdpi.com/2218-1997/9/11/478dark mattergravitygalaxy kinematics |
| spellingShingle | Francesco Benetti Andrea Lapi Giovanni Gandolfi Minahil Adil Butt Yacer Boumechta Balakrishna S. Haridasu Carlo Baccigalupi Dark Matter in Fractional Gravity III: Dwarf Galaxies Kinematics Universe dark matter gravity galaxy kinematics |
| title | Dark Matter in Fractional Gravity III: Dwarf Galaxies Kinematics |
| title_full | Dark Matter in Fractional Gravity III: Dwarf Galaxies Kinematics |
| title_fullStr | Dark Matter in Fractional Gravity III: Dwarf Galaxies Kinematics |
| title_full_unstemmed | Dark Matter in Fractional Gravity III: Dwarf Galaxies Kinematics |
| title_short | Dark Matter in Fractional Gravity III: Dwarf Galaxies Kinematics |
| title_sort | dark matter in fractional gravity iii dwarf galaxies kinematics |
| topic | dark matter gravity galaxy kinematics |
| url | https://www.mdpi.com/2218-1997/9/11/478 |
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