Gravitational wave constraints on extended dark matter structures

Croon, Djuna; Ipek, Seyda; McKeen, David

doi:10.1103/physrevd.107.063012

Cited by 6 publications

(2 citation statements)

References 45 publications

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“…where f cap denotes the fraction of DM which is captured as it streams through the star, and where ρ DM is the DM halo energy density. We can estimate the DM annihilation rate per effective volume as Γ ann = ⟨σ ann v⟩/V eff , with 1/V eff = V n 2 χ / V n χ as in [15]. This gives…”

Section: Dark Matter Energy Injectionsmentioning

confidence: 99%

Missing in axion: Where are XENON1T’s big black holes?

Croon

McDermott

Sakstein

2021

Physics of the Dark Universe

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Section: Dark Matter Energy Injectionsmentioning

confidence: 99%

Missing in axion: Where are XENON1T’s big black holes?

Croon

McDermott

Sakstein

2021

Physics of the Dark Universe

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“…There have been seminal works on various astrophysical aspects of extended dark matter structures and star-like objects-for instance, looking at their gravitational lensing characteristics [25][26][27][28], signatures from baryonic accretion [17,26], gravitational wave signatures [29,30] and so on (For a more comprehensive survey and summary of the existing literature, in these contexts, we kindly refer the interested reader to some of the excellent current reviews and white papers [23,24,[31][32][33]).…”

Section: Introductionmentioning

confidence: 99%

Q-balls in the sky

Ansari¹,

Bhandari²,

Thalapillil³

2023

Preprint

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There may exist extended configurations in the dark matter sector that are analogues of structures in the visible sector. In this work, we explore non-topological solitonic configurations, specifically Q-balls, and study when they may form macroscopic astrophysical structures and what their distinct characteristics might be. We study in some detail theoretical bounds on their sizes and constraints on the underlying parameters, based on criteria for an astrophysical Q-ball's existence, gravitational stability and viability of solutions. Following this path, one is able to obtain novel limits on astrophysical Q-ball sizes and their underlying parameters. We also explore the gravitational lensing features of different astrophysical Q-ball profiles, which are more general than the simple thin-wall limit. It is seen that the magnification characteristics may be very distinct, depending on the actual details of the solution, even for astrophysical Q-balls having the same size and mass. Assuming that such astrophysical Q-balls may form a small component of the dark matter in the universe, we place limits on this fraction from the gravitational microlensing surveys EROS-2, OGLE-IV and the proposed future survey WFIRST. Exploring various astrophysical Q-ball profiles and sizes, it is found that while for smaller masses, the dark matter fraction comprising astrophysical Q-balls is at most sub-percent, for larger masses, it may be significantly higher.

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Cosmic microwave background constraints on extended dark matter objects

Croon,

Muñoz

2024

J. Cosmol. Astropart. Phys.

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Primordially formed extended dark objects would accrete baryonic matter and impact the ionisation history of the Universe. Insisting on consistency with the anisotropies of the cosmic microwave background, we derive constraints on the dark matter fraction for various classes of objects, of different sizes. We introduce a novel scaling technique to speed up numerical calculations and release our calculation framework in the form of a Mathematica notebook. Conservatively, we focus on spherical accretion and collisional ionisation. We find strong constraints limiting the dark matter fraction to subpercent level for objects of up to 104 AU in size.

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Gravitational wave constraints on extended dark matter structures

Abstract: We generalize existing constraints on primordial black holes to dark objects with extended sizes using the aLIGO design sensitivity. We show that LIGO is sensitive to dark objects with radius Oð10 − 10 3 kmÞ if they make up more than ∼Oð10 −2 − 10 −3 Þ of dark matter.

Cited by 6 publications

References 45 publications

Missing in axion: Where are XENON1T’s big black holes?

Missing in axion: Where are XENON1T’s big black holes?

Q-balls in the sky

Cosmic microwave background constraints on extended dark matter objects

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