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The GD-1 Stellar Stream Perturber as a Core-collapsed Self-interacting Dark Matter Halo [PDF]
The Astrophysical Journal LettersThe GD-1 stellar stream exhibits spur and gap structures that may result from a close encounter with a dense substructure. When interpreted as a dark matter subhalo, the perturber is denser than predicted in the standard cold dark matter (CDM) model.
Xingyu Zhang +3 more
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The Galaxy Number Density Profile of Halos
The Astrophysical Journal, 2023 More precise measurements of galaxy clustering will be provided by the next generation of galaxy surveys, such as DESI, WALLABY, and the Square Kilometre Array.
Fei Qin +3 more
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Tilted Dark Halos Are Common and Long-lived, and Can Warp Galactic Disks
The Astrophysical Journal Letters, 2023 In the Lambda cold dark matter paradigm, the dark halo governs the gravitational potential within which a galaxy can form and evolve. In this Letter we show that the present-day inner ( r < 50 kpc) dark halo can be significantly misaligned with the ...
Jiwon Jesse Han +3 more
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Chemie Ingenieur Technik, EarlyView., 2023 Let us consider an alternative perspective on climate change: The sum of solar radiation and heat generated by human activity result in a net energy input of 1.96 times that of the Sun on the Earth's surface. The expanding global population is expected to exacerbate this issue. Potential solutions are proposed, including replacement and heat recycling.
Martin Bertau, Gerald Steiner
wiley +1 more source
The Astrophysical Journal, 2023 Constraining the distribution of small-scale structure in our universe allows us to probe alternatives to the cold dark matter paradigm. Strong gravitational lensing offers a unique window into small dark matter halos (
Sebastian Wagner-Carena +6 more
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Dark matter phenomenology of high-speed galaxy cluster collisions
European Physical Journal C: Particles and Fields, 2017 We perform a general computational analysis of possible post-collision mass distributions in high-speed galaxy cluster collisions in the presence of self-interacting dark matter.
Yuriy Mishchenko, Chueng-Ryong Ji
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The Astrophysical Journal, 2023 Galaxies show different halo scaling relations such as the radial acceleration relation, the mass discrepancy acceleration relation (MDAR), or the dark matter (DM) surface density relation.
A. Krut +4 more
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Relating the Structure of Dark Matter Halos to Their Assembly and Environment
The Astrophysical Journal, 2020 We use a large N -body simulation to study the relation of the structural properties of dark matter halos to their assembly history and environment. The complexity of individual halo assembly histories can be well described by a small number of principal
Yangyao Chen +6 more
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The Astrophysical Journal, 2023 Baryons both increase halo concentration through adiabatic contraction and expel mass through feedback processes. However, it is not well understood how the radiation fields prevalent during the epoch of reionization affect the evolution of concentration
Hanjue Zhu, Nickolay Y. Gnedin
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Physics Letters B, 2020 We discuss formation of dark matter (DM) mini-halos around primordial black holes (PBHs) and its implication on DM direct detection experiments, including axion searches.
Mark P. Hertzberg +2 more
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