Thermodynamics sheds light on the nature of dark matter galactic halos
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866909586886230016 |
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| author | Aceña, Andrés Barranco, Juan Bernal, Argelia López, Ericson |
| author_facet | Aceña, Andrés Barranco, Juan Bernal, Argelia López, Ericson |
| contents | In spherical symmetry, the gravitational potential is uniquely determined by the rotational velocity profile. Numerous galaxies exhibit a universal velocity profile from which a universal gravitational profile is inferred. When treating dark matter as either an ideal gas, a Fermi gas, or a Bose gas, only the latter can produce a gravitational profile consistent with observations, along with a temperature profile that decreases outward. This requires the mass of the boson to be below a certain threshold of $43\mbox{ eV}/c^2$. Additionally, ensuring that the speed of sound is less than the speed of light yields a lower bound on the boson's mass. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_15795 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Thermodynamics sheds light on the nature of dark matter galactic halos Aceña, Andrés Barranco, Juan Bernal, Argelia López, Ericson Astrophysics of Galaxies In spherical symmetry, the gravitational potential is uniquely determined by the rotational velocity profile. Numerous galaxies exhibit a universal velocity profile from which a universal gravitational profile is inferred. When treating dark matter as either an ideal gas, a Fermi gas, or a Bose gas, only the latter can produce a gravitational profile consistent with observations, along with a temperature profile that decreases outward. This requires the mass of the boson to be below a certain threshold of $43\mbox{ eV}/c^2$. Additionally, ensuring that the speed of sound is less than the speed of light yields a lower bound on the boson's mass. |
| title | Thermodynamics sheds light on the nature of dark matter galactic halos |
| topic | Astrophysics of Galaxies |
| url | https://arxiv.org/abs/2310.15795 |