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Structure formation with scalar field dark matter: the field approach [PDF]
Journal of Cosmology and Astroparticle Physics, 2012 We study the formation of structure in the Universe assuming that dark matter can be described by a scalar field $\tilde $ with a potential $V( )=-\mathfrak{m}^{2}\tilde ^{2}/2+ \tilde ^4/4$. We derive the evolution equations of the scalar field in the linear regime of perturbations.
Tonatiuh Matos +3 more
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Unifying dark energy and dark matter with a scalar field [PDF]
EAS Publications Series, 2006 The standard model of cosmology considers the existence of two components of unknown nature, ``dark matter'' and ``dark energy'', which determine the cosmological evolution. Their nature remains unknown, and other models can also be considered. In particular, it may be possible to reinterpret the recent cosmological observations so that the Universe ...
openaire +3 more sources
Scalar-field dark energy nonminimally and kinetically coupled to dark matter [PDF]
Physical Review D, 2020 published version with corrections, 24 ...
Ryotaro Kase, Shinji Tsujikawa
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European Physical Journal C: Particles and Fields, 2021 We consider a cosmological scenario endowed with an interaction between the universe’s dark components – dark matter and dark energy. Specifically, we assume the dark matter component to be a pressure-less fluid, while the dark energy component is a ...
Andronikos Paliathanasis +4 more
doaj +1 more source
Cosmic microwave background constraints on coupled dark matter [PDF]
, 2014 We study CMB constraints on a model with a cosmological constant and a fraction of dark matter non-minimally coupled to a massless scalar field. In this scenario, there is an extra gravity-like fifth force which can affect the evolution of the Universe ...
Green, Anne M., Morris, Sophie C. F.
core +3 more sources
The quantum character of the Scalar Field Dark Matter
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT The scalar field dark matter (SFDM) model, also called Fuzzy, Wave, Bose–Einstein, and Ultra-light Dark Matter, has received a lot of attention because it has been able to provide simpler and more natural explanations for various features of galaxies, such as the number of satellite galaxies and the cusp-core problem.
openaire +2 more sources
Effects of dark matter on the spontaneous scalarization in neutron stars
European Physical Journal C: Particles and FieldsDark matter, an important portion of compact objects, can influence different phenomena in neutron stars. The spontaneous scalarization in the scalar-tensor gravity has been proposed for neutron stars.
Fahimeh Rahimi, Zeinab Rezaei
doaj +1 more source
Journal of High Energy Physics, 2021 We propose a new mechanism to communicate between fermion dark matter and the Standard Model (SM) only through the four-form flux. The four-form couplings are responsible for the relaxation of the Higgs mass to the correct value and the initial ...
Yoo-Jin Kang +3 more
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Static Configurations of Dark Energy and Dark Matter
, 2005 We study static configurations of dark matter coupled to a scalar field responsible for the dark energy of the Universe. The dark matter is modelled as a Fermi gas within the Thomas-Fermi approximation. The mass of the dark matter particles is a function
Barbieri R Hall L J Oliver S J Strumia A +11 more
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Effects of chronic browsing on life‐history traits of an irruptive large herbivore population
Population Ecology, EarlyView.This study aimed to determine the relationship between diet quality, body mass, and size (hind foot length), and female reproduction and sought to identify the mechanism by which high density under severe food limitations is maintained. Our results demonstrated that sika deer introduced to Nakanoshima Island have maintained high densities through high ...
Koichi Kaji +9 more
wiley +1 more source