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| Paper: |
Habitable Worlds Observatory: Strong Lensing Constraints on Dark Matter Halo Mass Function down to 107 M⊙ |
| Monograph: |
10, HWO25 Proceedings Part I: Community Science Case Development Documents |
| Page: |
221 |
| Authors: |
Qiuhan He; David Lagattuta; Mathilde Jauzac; Tansu Daylan; Richard Massey; Jason Rhodes; Jessica E. Doppel; Leonidas Moustakas; Alina Kiessling; Russell Smith; Stephane Werner; James Nightingale; Maximilian von Wietersheim-Kramsta; Satyapriya Das |
| DOI: |
10.26624/EZVJ2597 |
| Abstract: |
We present the science case for constraining the dark matter halo mass function through strong gravitational lensing with the Habitable Worlds Observatory (HWO). The standard cold dark matter predicts
a vast population of haloes extending down to sub-solar masses, while its popular alternative, the warm
dark matter model, predicts a cutoff in the halo mass function at sub-galactic scale of ∼106
−1010 M⊙.
Probing such low-mass haloes via strong gravitational lensing provides a powerful test to discriminate
between these models. With the extremely high-quality imaging and spectroscopic capabilities of HWO,
particularly its high-resolution imaging, we expect to detect dark haloes as small as ∼107 M⊙. This will
enable unprecedented constraints on the dark matter particle mass in the >10 keV regime, ruling in or out a
range of popular dark matter models. |
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