☆ 4.4 Review

Review of latest advances on dark matter from the viewpoint of the Occam razor principle

NEW ASTRONOMY REVIEWS (2023)

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Article Astronomy & Astrophysics

Galactic Dark Matter Halos Containing H i Regions: A Possible Overestimation of the Column Densities

Eugene Oks

Summary: We analyze how the column density of hydrogen atoms in the H i regions can be determined in dark matter halos of galaxies. The possible presence of the Second Flavor of Hydrogen Atoms (SFHA) is investigated, and neglecting SFHA leads to overestimation of the column density by about 30%. These simple estimates aim to convey a message and inspire further theoretical and experimental studies.

RESEARCH IN ASTRONOMY AND ASTROPHYSICS (2023)

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Article Physics, Particles & Fields

Stringballs and Planckballs for dark matter

Zhongyou Mo et al.

Summary: This paper investigates the formation of gravitationally interacting bound states in different theoretical frameworks when the energy meets certain conditions. These bound states can serve as candidates for dark matter and as seeds for the formation of large-scale structures in the Cosmos.

JOURNAL OF HIGH ENERGY PHYSICS (2022)

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Article Astronomy & Astrophysics

Dark matter as an effect of a minimal length

Pasquale Bosso et al.

Summary: This study investigates the implications of a phenomenological model of quantum gravitational effects associated with a minimal length. It derives a modified law of gravity through Verlinde's conjecture, utilizing the Bekenstein-Hawking entropy. The study explores the effects on galactic scales, particularly on the shape of rotational curves, and examines the potential to mimic dark matter-like effects using a minimal length.

FRONTIERS IN ASTRONOMY AND SPACE SCIENCES (2022)

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Article Astronomy & Astrophysics

Strange physics of dark baryons

Gonzalo Alonso-Alvarez et al.

Summary: Dark decays of hadronic states containing strange quarks, known as hyperons, provide a promising framework for understanding the origin of dark matter and the matter-antimatter asymmetry of the universe. By calculating the relevant matrix elements and considering various constraints, we determine the expected rates of hyperon decays at hyperon factories like BESIII and LHCb. We also uncover interesting theoretical connections between hyperon dark decays, the neutron lifetime anomaly, and mesogenesis.

PHYSICAL REVIEW D (2022)

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Review Astronomy & Astrophysics

A Brief Review on Primordial Black Holes as Dark Matter

Pablo Villanueva-Domingo et al.

Summary: This review discusses the formation, abundance, and characteristic signals of primordial black holes, as well as their impact on the evolution of the Universe and structure formation. It also explores the most relevant probes capable of constraining their masses and population.

FRONTIERS IN ASTRONOMY AND SPACE SCIENCES (2021)

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Review Astronomy & Astrophysics

Brief review of recent advances in understanding dark matter and dark energy

Eugene Oks

Summary: Studies on dark sector, comprising about 95% of the Universe, are ongoing with recent theoretical advances focusing on models of dark matter, dark energy, and alternative explanations for observed effects. Recent research covers particle and non-particle models of dark matter, disputes regarding dark energy, and new hypothetical types of dark matter, providing insights into the dynamics of the Universe's expansion.

NEW ASTRONOMY REVIEWS (2021)

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Article Astronomy & Astrophysics

DES map shows a smoother distribution of matter than expected: a possible explanation

Eugene Oks

Summary: The Dark Energy Survey team has recently created the largest and most detailed map of dark matter distribution in the Universe. The distribution was found to be slightly smoother and less clumpy than predicted by general relativity. The team's study suggests a hint of new physical laws, but the model presented in the paper offers a simpler explanation without relying on any new laws.

RESEARCH IN ASTRONOMY AND ASTROPHYSICS (2021)

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Article Astronomy & Astrophysics

Dark Energy Survey Year 3 results: Curved-sky weak lensing mass map reconstruction

N. Jeffrey et al.

Summary: Reconstructed mass maps from DES Y3 weak gravitational lensing data were presented, using four different methods implemented on the celestial sphere. The performance of the methods was quantified using simulations closely matched to the DES Y3 data, and systematic error tests were conducted. The recovered dark matter map showed the largest sky coverage of any galaxy weak lensing map to date, and was used for evaluating cosmic-void profiles.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2021)

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Article Multidisciplinary Sciences

Lensing Effects in Retarded Gravity

Asher Yahalom

Summary: Galaxies are massive physical systems with changes at the center affecting the rim tens of millennia later. Current models may overlook retardation effects, leading to discrepancies between predicted and observed velocities. By considering general relativistic effects and non-dark matter, excess matter causing gravitational lensing can be explained.

SYMMETRY-BASEL (2021)

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Article Astronomy & Astrophysics

Effects of Higher Order Retarded Gravity

Asher Yahalom

Summary: In our recent study, we have shown that the flattening of galactic rotation curves can be explained by retardation, with a temporal change of galactic mass. After considering analysis to all orders, we have found that a second order analysis will suffice and higher order terms can be neglected.

UNIVERSE (2021)

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Article Astronomy & Astrophysics

Cosmological and astrophysical probes of dark baryons

David McKeen et al.

Summary: This study examines the cosmological and astrophysical signatures of a dark baryon that mixes with neutrons, discussing enhanced production at high energies and constraints from various sources such as primordial nucleosynthesis, the cosmic microwave background, and neutron decays in neutron stars. The research identifies parameter space where the dark baryon can be a viable dark matter candidate and explores potential avenues for further investigation.

PHYSICAL REVIEW D (2021)

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Review Physics, Nuclear

Dark matter and the early Universe: A review

A. Arbey et al.

Summary: This review discusses possible explanations for dark matter and the experimental observables that could lead to its discovery, highlighting the interplay between cosmological properties of the early Universe and observables used to constrain dark matter models in the context of new physics beyond the Standard Model.

PROGRESS IN PARTICLE AND NUCLEAR PHYSICS (2021)

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Article Astronomy & Astrophysics

Paradigms and Scenarios for the Dark Matter Phenomenon

Paolo Salucci et al.

UNIVERSE (2020)

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Review Astronomy & Astrophysics

Dark Matters on the Scale of Galaxies

Ivan de Martino et al.

UNIVERSE (2020)

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Article Astronomy & Astrophysics

Alternative kind of hydrogen atoms as a possible explanation for the latest puzzling observation of the 21 cm radio line from the early Universe

Eugene Oks

RESEARCH IN ASTRONOMY AND ASTROPHYSICS (2020)

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Article Physics, Multidisciplinary

Self-Interacting Dark Matter and the Origin of Ultradiffuse Galaxies NGC1052-DF2 and-DF4

Daneng Yang et al.

PHYSICAL REVIEW LETTERS (2020)

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Article Multidisciplinary Sciences

Lorentz Symmetry Group, Retardation, Intergalactic Mass Depletion and Mechanisms Leading to Galactic Rotation Curves

Asher Yahalom

SYMMETRY-BASEL (2020)

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Article Physics, Atomic, Molecular & Chemical

Two Flavors of Hydrogen Atoms: A Possible Explanation of Dark Matter

Eugene Oks

ATOMS (2020)

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Article Physics, Particles & Fields

An explanation for dark matter and dark energy consistent with the standard model of particle physics and General Relativity

Alexandre Deur

EUROPEAN PHYSICAL JOURNAL C (2019)

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Article Multidisciplinary Sciences

Possible interaction between baryons and dark-matter particles revealed by the first stars

Rennan Barkana

NATURE (2018)

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Article Multidisciplinary Sciences

An absorption profile centred at 78 megahertz in the sky-averaged spectrum

Judd D. Bowman et al.

NATURE (2018)

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Article Multidisciplinary Sciences

A small amount of mini-charged dark matter could cool the baryons in the early Universe

Julian B. Munoz et al.

NATURE (2018)

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Article Astronomy & Astrophysics

Enhanced Global Signal of Neutral Hydrogen Due to Excess Radiation at Cosmic Dawn

Chang Feng et al.

ASTROPHYSICAL JOURNAL LETTERS (2018)

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Article Astronomy & Astrophysics

Modeling the Radio Background from the First Black Holes at Cosmic Dawn: Implications for the 21 cm Absorption Amplitude

A. Ewall-Wice et al.

ASTROPHYSICAL JOURNAL (2018)

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Article Astronomy & Astrophysics

The shape of dark matter haloes -I. HI observations of edge-on galaxies

S. P. C. Peters et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2017)

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Article Astronomy & Astrophysics

The properties of 'dark' ACDM haloes in the Local Group

Alejandro Benitez-Llambay et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2017)

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Article Astronomy & Astrophysics

The shape of dark matter haloes - V. Analysis of observations of edge-on galaxies

S. P. C. Peters et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2017)

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Article Physics, Multidisciplinary

Cores in Dwarf Galaxies from Dark Matter with a Yukawa Potential

Abraham Loeb et al.

PHYSICAL REVIEW LETTERS (2011)

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Article Optics

High-energy tail of the linear momentum distribution in the ground state of hydrogen atoms or hydrogen-like ions

E Oks

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS (2001)

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Article Physics, Multidisciplinary

Observational evidence for self-interacting cold dark matter

DN Spergel et al.

PHYSICAL REVIEW LETTERS (2000)

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