Article
Astronomy & Astrophysics
Peter W. Graham, Selcuk Haciomeroglu, David E. Kaplan, Zhanibek Omarov, Surjeet Rajendran, Yannis K. Semertzidis
Summary: Proton storage ring experiments designed to search for proton electric dipole moments can also be used to investigate nearly dc spin precession induced by dark energy and ultralight dark matter. These experiments are sensitive to both axion-like and vector fields, with current technology permitting probes of these phenomena up to 3 orders of magnitude beyond astrophysical limits. The relativistic boost of the protons in these rings enables sensitivities comparable to atomic comagnetometer experiments, allowing the extraction of microphysics of signals and differentiation between pseudoscalar, magnetic, and electric dipole moment interactions.
Article
Astronomy & Astrophysics
Stephane Ilic, Michael Kopp, Constantinos Skordis, Daniel B. Thomas
Summary: This study conducts the first test of dark matter stress-energy evolution throughout cosmic history using various observational data sets. The results show constraints on dark matter equation of state, sound speed, and viscosity across different redshift bins, with no compelling evidence for non-ΛCDM values. The study suggests that allowing time dependence for both the equation of state and sound speed parameters may offer potential solutions to tensions within the ΛCDM model.
Article
Astronomy & Astrophysics
Alvaro de la Cruz Dombriz, Francisco Jose Maldonado Torralba, David F. Mota
Summary: The stable pseudo-scalar degree of freedom in the quadratic Poincare Gauge theory of gravity is identified as a suitable candidate for dark matter. The study determines the parameter space in the theory that can explain all predicted cold dark matter phenomena and constrains these parameters with astrophysical observations.
Article
Astronomy & Astrophysics
Celine Boehm, Xiaoyong Chu, Jui-Lin Kuo, Josef Pradler
Summary: The study revisited the possibility of light-scalar dark matter coupled to electrons through fermion or vector mediators, and established new limits and loop-induced processes strengths. Various constraints were considered, largely excluding the explanation of the International Gamma-Ray Astrophysics Laboratory excess of 511 keV photons by galactic annihilation of these particles.
Article
Astronomy & Astrophysics
Lam Hui, Y. . T. Albert Law, Luca Santoni, Guanhao Sun, Giovanni Maria Tomaselli, Enrico Trincherini
Summary: Studies on black hole superradiance often focus on the growth of a cloud in isolation and the spin-down of the black hole. However, this paper considers the additional effect of matter and angular momentum accretion from the surrounding environment. The authors demonstrate that the black hole can evolve by drifting along the superradiance threshold, allowing for analytical or semi-analytical description of its parameter evolution. They also propose the concept of oversuperradiance, where accretion effectively feeds the superradiance cloud through the black hole. Two examples of accretion processes are provided: from a vortex in wave dark matter and from a baryonic disk. The paper also discusses level transition in a similar manner.
Article
Astronomy & Astrophysics
A. Arbey, J-F Coupechoux
Summary: This paper explores the possibility of a scalar field replacing dark matter, dark energy, and inflation by introducing a non-minimal coupling to gravity, a Mexican hat potential, and spontaneous symmetry breaking. The scalar field behaves like a dark fluid after inflation, mimicking the properties of both dark energy and dark matter.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
David Figueruelo, Miguel Aparicio Resco, Florencia A. Teppa Pannia, Jose Beltran Jimenez, Dario Bettoni, Antonio L. Maroto, L. Raul Abramo, Jailson Alcaniz, Narciso Benitez, Silvia Bonoli, Saulo Carneiro, Javier Cenarro, David Cristobal-Hornillos, Renato A. Dupke, Alessandro Ederoclite, Carlos Lopez-Sanjuan, Antonio Marin-Franch, Valerio Marra, Claudia Mendes de Oliveira, Mariano Moles, Laerte Sodre, Keith Taylor, Jesus Varela, Hector Vazquez Ramio
Summary: The study examines a cosmological model with coupling between dark matter and dark energy, and finds through fitting and forecasting that a coupling is more suitable than an uncoupled scenario in cosmology, primarily driven by cluster counts.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Astronomy & Astrophysics
Florian Niedermann, Martin S. Sloth
Summary: Hot new early dark energy is a supercooled phase transition that occurs at sub-eV temperatures in the dark sector. It provides a possible solution to the Hubble tension and explains neutrino masses through the inverse seesaw mechanism.
Article
Astronomy & Astrophysics
Cristina Mondino, Maxim Pospelov, Joshua T. Ruderman, Oren Slone
Summary: A new U(1) dark gauge group is coupled to the Standard Model through kinetic mixing, providing a dark matter candidate in the form of the dark Higgs field, which generates the mass of the dark photon. Conditions involving the mass of the dark Higgs, the kinetic mixing parameter, and the dark gauge coupling lead to a sufficiently metastable dark Higgs to serve as dark matter. Both freeze-in and freeze-out processes can result in viable dark Higgs dark matter with a sub-GeV mass and a specific range of kinetic mixing parameter.
Article
Astronomy & Astrophysics
Wenyu Wang, Wu-Long Xu, Bin Zhu
Summary: This study investigates the influence of the intrinsic interaction of dark matter self-scattering on structure formation. By introducing a simplified model and a new definition of velocity dependence, the impact of dark protons on cosmological structures is revealed.
Article
Physics, Multidisciplinary
Raziyeh Zaregonbadi, Matin Honardoost
Summary: The study investigates the effects of dark matter on galaxy scales by considering dynamics of a symmetron-like field. A model is proposed to explain flat rotation curves in galactic halos without the need for dark matter, and the light deflection angle is explored as a possible physical test. The results show compatibility with previous dark matter models.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Astronomy & Astrophysics
Katherine Freese, Martin Wolfgang Winkler
Summary: The hot big bang is believed to be the origin of all matter and radiation in the Universe. Primordial nucleosynthesis provides strong evidence for the existence of a hot plasma in the early Universe. This paper describes a scenario in which dark matter can be formed around or even after primordial nucleosynthesis in a second big bang, called the dark big bang. The dark big bang occurs through a phase transition in the dark sector.
Article
Astronomy & Astrophysics
Michael Ryan, James Gurian, Sarah Shandera, Donghui Jeong
Summary: Molecular cooling is crucial for studying the formation of substructure in dissipative dark-matter halos, and this study analyzes the reaction rates related to hydrogenic molecules, providing results applicable to weakly coupled dark matter scenarios.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Ze-Wei Zhao, Ling-Feng Wang, Ji-Guo Zhang, Jing-Fei Zhang, Xin Zhang
Summary: This research investigates the capability of future fast radio bursts (FRBs) to constrain the dimensionless coupling parameter in interacting dark energy (IDE) models. The results suggest that future observations have the potential to provide tighter constraints on this parameter compared to current data, offering a promising avenue for precise measurements.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Astronomy & Astrophysics
S. Capozziello, S. Zare, D. F. Mota, H. Hassanabadi
Summary: In this study, the effects of a dark matter spike near the supermassive black hole in M87 (Virgo A galaxy) were investigated using the Bumblebee Gravity theory. The aim was to determine the impact of spontaneous Lorentz symmetry breaking on the horizon, ergo-region, and shadow of the Kerr Bumblebee black hole in the spike region. Dark matter distribution was incorporated into a Lorentz-violating spherically symmetric space-time, and the resulting solution was generalized to a Kerr Bumblebee black hole. The shapes of the shadow were examined based on observational data for the dark matter spike density and radius.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)