Tag: Dark matter
Interacting dark energy and dark matter models fit current data
What the study found The study found that two versions of a cosmological model with interacting dark energy and dark matter can fit current observations well. The models use a Gauss–Bonnet-coupled scalar field as dark energy and a fermionic dark matter field, with either an exponential or a power-law scalar potential. Why the authors say…
Scalar leptoquarks help fermionic dark matter evade direct detection
What the study found The study finds that adding scalar leptoquarks to a vector-like lepton dark matter model can change the dark matter candidate so it better avoids direct detection limits. The added interactions can split the neutral dark matter state into two non-degenerate pseudo-Dirac states and enlarge the parameter space that can reproduce the…
Pancakes in 2D cosmic structure are mostly C-shaped
What the study found In 2D cold dark matter cosmologies, the study found that many pancakes evolve into filaments, while pancakes that evolve into halos are more strongly curved. The shapes are mostly C-shaped, and shell crossing is highly anisotropic, meaning it differs by direction. Why the authors say this matters The authors say this…
LMC corona measurements favor a first-passage orbit
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in AstrophysicsWhat the study found The study found that the Large Magellanic Cloud’s (LMC’s) gaseous halo, or corona, is more consistent with a first-passage orbital model than a second-passage model. In the authors’ simulations, the first-passage case matched the observed present-day velocity and column density profiles more closely. Why the authors say this matters The authors…
Artificial satellite arrays improve axionlike dark matter sensitivity
What the study found A proposed Artificial Pulsar Polarization Array (APPA) — a satellite network with multiple pulsed signal transmitters and one receiver satellite — was simulated to test sensitivity to axionlike dark matter. The simulations indicated that APPA could give a tighter upper limit on the axion-photon coupling parameter, g_aγ, than conventional ground-based observations…
Machine learning helped identify viable dark matter regions in 2HDM2S
What the study found The study reports that a machine learning-based exploration, using Evolutionary Strategies, was able to efficiently search for regions with a viable dark matter candidate in the 2HDM2S model, a two real scalar singlet extension of the two Higgs doublet model. Why the authors say this matters The authors present this as…
Two-component dark matter shows enhanced self-resonant scattering
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What the study found The study presents a two-component scalar dark matter model in which both dark matter components are stable because of a remaining Z4 gauge symmetry, left over from a U(1)′ local symmetry. Under a resonance condition for the dark matter masses, the authors report enhanced elastic co-scattering between the two dark matter…
Different interferometer combinations vary in axion dark matter sensitivity
Explore how space-based gravitational wave detectors can detect axion-like dark matter using different time-delay interferometry combinations, achieving sensitivity across a broad mass range.
Review compares methods for simulating fuzzy dark matter
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in AstrophysicsReview of numerical simulation methods for fuzzy dark matter, examining wave-based and fluid-based algorithms for resolving ultralight boson dynamics on galactic scales.
VSDM release supports dark matter scattering calculations
VSDM version 0.3 provides Julia and Python tools for computing dark matter scattering rates in anisotropic detector materials through partial rate matrix calculations.
