Dynamical Friction From Ultralight Dark Matter

Wang, Yourong; Easther, Richard

doi:10.48550/arxiv.2110.03428

Cited by 3 publications

(3 citation statements)

References 38 publications

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“…For ULDM, if this overdensity is smaller than 𝜆 𝑑𝐵 , the final term in (3) responds to the contraction, and reduces the size of the wake, modifying DF. It turns out that the final answer is more complex, and still being investigated, se e.g [13,[23][24][25][26]. For the degenerate fermions, one expects that degenerate pressure counteracts when one tries to compress it below the scale where fermions should occupy the same state (recall that for a galaxy, we assume a virial distribution, which as a related Fermi momentum).…”

Section: Pos(cosmicwispers)014mentioning

confidence: 99%

Probing ultralight and degenerate dark matter with galactic dynamics

Blas

2024

Proceedings of 1st General Meeting and 1st Training School of the COST Action COSMIC WSIPers — PoS(COSMICWISPers)

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This short contribution summarizes a couple of recent results to test dark matter properties with galactic dynamics. First, I will present the impact in rotation curves from solitonic structures expected at the center of galaxies for ultralight bosonic dark matter. As a result, one can claim that masses of the order 𝑚 DM ≲ 10 −21 eV are in tension with data. Second, I will discuss how the dark matter medium properties change the way a 'probe' interacts with the halo. I will focus on dynamical friction and show how it is modified in the case of degenerate fermions. This result may be used to address the Fornax timing problem. I hope that this contribution represents an inspiration to continue exploring other ideas in the direction of using galactic dynamics to tell apart different dark matter models.1st General Meeting and 1st Training School of the COST Action COSMIC WSIPers (COSMICWISPers)

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Section: Pos(cosmicwispers)014mentioning

confidence: 99%

Probing ultralight and degenerate dark matter with galactic dynamics

Blas

2024

Proceedings of 1st General Meeting and 1st Training School of the COST Action COSMIC WSIPers — PoS(COSMICWISPers)

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“…[51][52][53][54][55][56]. More diverse environments, such as fuzzy dark matter, self-interacting or superrandiance-driven scalar clouds, and Bose-Einstein condensates, have also been explored recently [6,[57][58][59][60][61][62][63][64].…”

Section: Jcap06(2024)024mentioning

confidence: 99%

Dynamical friction in dark matter superfluids: The evolution of black hole binaries

Berezhiani,

Cintia,

De Luca

et al. 2024

J. Cosmol. Astropart. Phys.

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The theory of superfluid dark matter is characterized by self-interacting sub-eV particles that thermalize and condense to form a superfluid core in galaxies. Massive black holes at the center of galaxies, however, modify the dark matter distribution and result in a density enhancement in their vicinity known as dark matter spikes. The presence of these spikes affects the evolution of binary systems by modifying their gravitational wave emission and inducing dynamical friction effects on the orbiting bodies. In this work, we assess the role of dynamical friction for bodies moving through a superfluid core enhanced by a central massive black hole. As a first step, we compute the dynamical friction force experienced by bodies moving in a circular orbit. Then, we estimate the gravitational wave dephasing of the binary, showing that the effect of the superfluid drag force is beyond the reach of space-based experiments like LISA, contrarily to collisionless dark matter, therefore providing an opportunity to distinguish these dark matter models.

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“…Small-scale power may be effectively probed using the Lyman-α forest, which has been used to constrain both the temperature and fuzziness of DM [288,289,290]. Fuzzy DM also generates unique signatures such as interference patterns which heat stellar orbits and alter stellar streams and lensing [291,292,293], and presents more complex dynamical friction behaviour than CDM [294,295].…”

Section: Degeneracies With Novel Dark Matter or Gravitational Physicsmentioning

confidence: 99%

Astrophysical Tests of Dark Matter Self-Interactions

Adhikari¹,

Banerjee²,

Boddy³

et al. 2022

Preprint

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Self-interacting dark matter (SIDM) arises generically in scenarios for physics beyond the Standard Model that have dark sectors with light mediators or strong dynamics. The selfinteractions allow energy and momentum transport through halos, altering their structure and dynamics relative to those produced by collisionless dark matter. SIDM models provide a promising way to explain the diversity of galactic rotation curves, and they form a predictive and versatile framework for interpreting astrophysical phenomena related to dark matter.This review provides a comprehensive explanation of the physical effects of dark matter self-interactions in objects ranging from galactic satellites (dark and luminous) to clusters of galaxies and the large-scale structure. The second major part describes the methods used to constrain SIDM models including current constraints, with the aim of advancing tests with upcoming galaxy surveys. This part also provides a detailed review of the unresolved small-scale structure formation issues and concrete ways to test simple SIDM models. The

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Dynamical Friction From Ultralight Dark Matter

Cited by 3 publications

References 38 publications

Probing ultralight and degenerate dark matter with galactic dynamics

Probing ultralight and degenerate dark matter with galactic dynamics

Dynamical friction in dark matter superfluids: The evolution of black hole binaries

Astrophysical Tests of Dark Matter Self-Interactions

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