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- Publisher Website: 10.1093/mnras/stab855
- Scopus: eid_2-s2.0-85107969166
- WOS: WOS:000659453800091
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Article: Wave dark matter and ultra-diffuse galaxies
Title | Wave dark matter and ultra-diffuse galaxies |
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Authors | |
Keywords | dark matter |
Issue Date | 26-Mar-2021 |
Publisher | Oxford University Press |
Citation | Monthly Notices of the Royal Astronomical Society, 2021, v. 504, n. 2, p. 2868-2876 How to Cite? |
Abstract | Dark matter (DM) as a Bose–Einstein condensate, such as the axionic scalar field particles of String Theory, can explain the coldness of DM on large scales. Pioneering simulations in this context predict a rich wave-like structure, with a ground state soliton core in every galaxy surrounded by a halo of excited states that interfere on the de Broglie scale. This de Broglie scale is largest for the low-mass galaxies as momentum is lower, providing a simple explanation for the wide cores of dwarf spheroidal galaxies. Here we extend these ‘wave dark matter’ (ψDM) predictions to the newly discovered class of ‘ultra-diffuse galaxies’ (UDG) that resemble dwarf spheroidal galaxies but with more extended stellar profiles. Currently, the best-studied example, ‘Dragon Fly 44’ (DF44), has a uniform velocity dispersion of ≃33 km s−1, extending to at least 3 kpc, that we show is reproduced by our ψDM simulations with a soliton radius of ≃0.5 kpc. In the ψDM context, we show that relatively flat dispersion profile of DF44 lies between massive galaxies with compact dense solitons, as may be present in the Milky Way on a scale of 100 pc and lower mass galaxies where the velocity dispersion declines centrally within a wide, low-density soliton, like Antlia II, of radius 3 kpc. |
Persistent Identifier | http://hdl.handle.net/10722/338156 |
ISSN | 2023 Impact Factor: 4.7 2023 SCImago Journal Rankings: 1.621 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Pozo, Alvaro | - |
dc.contributor.author | Broadhurst, Tom | - |
dc.contributor.author | de Martino, Ivan | - |
dc.contributor.author | Luu, Hoang Nhan | - |
dc.contributor.author | Smoot, George F | - |
dc.contributor.author | Lim, Jeremy | - |
dc.contributor.author | Neyrinck, Mark | - |
dc.date.accessioned | 2024-03-11T10:26:40Z | - |
dc.date.available | 2024-03-11T10:26:40Z | - |
dc.date.issued | 2021-03-26 | - |
dc.identifier.citation | Monthly Notices of the Royal Astronomical Society, 2021, v. 504, n. 2, p. 2868-2876 | - |
dc.identifier.issn | 0035-8711 | - |
dc.identifier.uri | http://hdl.handle.net/10722/338156 | - |
dc.description.abstract | <p>Dark matter (DM) as a Bose–Einstein condensate, such as the axionic scalar field particles of String Theory, can explain the coldness of DM on large scales. Pioneering simulations in this context predict a rich wave-like structure, with a ground state soliton core in every galaxy surrounded by a halo of excited states that interfere on the de Broglie scale. This de Broglie scale is largest for the low-mass galaxies as momentum is lower, providing a simple explanation for the wide cores of dwarf spheroidal galaxies. Here we extend these ‘wave dark matter’ (ψDM) predictions to the newly discovered class of ‘ultra-diffuse galaxies’ (UDG) that resemble dwarf spheroidal galaxies but with more extended stellar profiles. Currently, the best-studied example, ‘Dragon Fly 44’ (DF44), has a uniform velocity dispersion of ≃33 km s<sup>−</sup><sup>1</sup>, extending to at least 3 kpc, that we show is reproduced by our ψDM simulations with a soliton radius of ≃0.5 kpc. In the ψDM context, we show that relatively flat dispersion profile of DF44 lies between massive galaxies with compact dense solitons, as may be present in the Milky Way on a scale of 100 pc and lower mass galaxies where the velocity dispersion declines centrally within a wide, low-density soliton, like Antlia II, of radius 3 kpc.<br></p> | - |
dc.language | eng | - |
dc.publisher | Oxford University Press | - |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.subject | dark matter | - |
dc.title | Wave dark matter and ultra-diffuse galaxies | - |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/stab855 | - |
dc.identifier.scopus | eid_2-s2.0-85107969166 | - |
dc.identifier.volume | 504 | - |
dc.identifier.issue | 2 | - |
dc.identifier.spage | 2868 | - |
dc.identifier.epage | 2876 | - |
dc.identifier.eissn | 1365-2966 | - |
dc.identifier.isi | WOS:000659453800091 | - |
dc.identifier.issnl | 0035-8711 | - |