Stochastic lensing of stars by ultralight dark matter halos
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Acceso en línea: | |
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| _version_ | 1866913712575610880 |
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| author | Eberhardt, Andrew Ferreira, Elisa Luo, Wentao Lin, Shurui Li, Yin |
| author_facet | Eberhardt, Andrew Ferreira, Elisa Luo, Wentao Lin, Shurui Li, Yin |
| contents | Ultralight dark matter is an interesting dark matter candidate describing the lightest end of the mass parameter space. This model produces an oscillating granular pattern in halo densities. These fluctuations have the potential to produce a time-varying density along the line of sight creating a small lensing signal for any stars observed through a dark matter halo which oscillates on the de Broglie timescale. In this work, we study this stochastic lensing signal taking into account the impact of density granules as well as the central soliton. We calculate the amplitude and temporal properties of this signal and estimate how stellar observations may be used to constrain the ultralight dark matter mass and abundance. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_20697 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Stochastic lensing of stars by ultralight dark matter halos Eberhardt, Andrew Ferreira, Elisa Luo, Wentao Lin, Shurui Li, Yin Cosmology and Nongalactic Astrophysics Ultralight dark matter is an interesting dark matter candidate describing the lightest end of the mass parameter space. This model produces an oscillating granular pattern in halo densities. These fluctuations have the potential to produce a time-varying density along the line of sight creating a small lensing signal for any stars observed through a dark matter halo which oscillates on the de Broglie timescale. In this work, we study this stochastic lensing signal taking into account the impact of density granules as well as the central soliton. We calculate the amplitude and temporal properties of this signal and estimate how stellar observations may be used to constrain the ultralight dark matter mass and abundance. |
| title | Stochastic lensing of stars by ultralight dark matter halos |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2502.20697 |