Results 41 to 50 of about 147,206 (344)
Constraints on the mass and self-coupling of ultra-light scalar field dark matter using observational limits on galactic central mass [PDF]
Journal of Cosmology and Astroparticle Physics, 2022 It is well known that Ultra-Light Dark Matter (ULDM), usually scalar fields of mass m ∼ 10-22 eV, can solve some of the outstanding problems of the Cold Dark Matter (CDM) paradigm. Such a scalar field could have non-negligible self-coupling λ.
S. Chakrabarti +3 more
semanticscholar +1 more source
Scalar fields as dark matter in spiral galaxies [PDF]
Classical and Quantum Gravity, 1999 5 pages, RevTeX, eight eps figures.
F Siddhartha Guzmán, Tonatiuh Matos
openalex +5 more sources
Analytical treatment of small scales matter power spectrum in coupled scalar field (CSF) cosmology [PDF]
EPJ Web of Conferences, 2020 In this paper, we reconstruct matter power spectrum of a cosmological model in which coupled scalar field acts as dark energy. The coupled scalar field (CSF) dark energy we propose here is a generalized model of quintessence, k-essence or phantom coupled
Mulki Fargiza A. M., Wulandari Hesti
doaj +1 more source
Observational constraints on a logarithmic scalar field dark energy model and black hole mass evolution in the Universe [PDF]
The European Physical Journal C, 2023 We propose a logarithmic parametrization form of energy density for the scalar field dark energy in the framework of the standard theory of gravity, which supports the necessary transition from the decelerated to the accelerated behavior of the Universe.
Dan Wang +4 more
semanticscholar +1 more source
, 2021 In recent years, the scalar field dark matter (SFDM), also called ultralight bosonic dark matter, has received considerable attention due to the number of problems it might help to solve.
Jordi Solís-López +4 more
semanticscholar +1 more source
Halos of unified dark matter scalar field [PDF]
Journal of Cosmology and Astroparticle Physics, 2008 We investigate the static and spherically symmetric solutions of Einstein's equations for a scalar field with non-canonical kinetic term, assumed to provide both the dark matter and dark energy components of the Universe. In particular, we give a prescription to obtain solutions (dark halos) whose rotation curve v_c(r) is in good agreement with ...
BERTACCA, DANIELE +2 more
openaire +2 more sources
Parkes Pulsar Timing Array constraints on ultralight scalar-field dark matter [PDF]
Physical Review D, 2018 It is widely accepted that dark matter contributes about a quarter of the critical mass-energy density in our Universe. The nature of dark matter is currently unknown, with the mass of possible constituents spanning nearly one hundred orders of magnitude.
N. Porayko +29 more
semanticscholar +1 more source
Structure Formation with Scalar Field Dark Matter [PDF]
AIP Conference Proceedings, 2010 In this work we calculate the different ingredients needed to obtain the matter density profile of the large‐scale structure we observe now a days in a qualitative way. The key difference of the work lays on the fact that we study the formation of structure in the Universe assuming that dark matter can be described by a scalar field (SF) Φ with a ...
Tonatiuh Matos +6 more
openalex +2 more sources
Scalar Field Dark Matter [PDF]
, 2005 11 pagez, 5 figures, REVTeX. To appear in proceedings of the ``Mexican Meeting on Exact Solutions and Scalar Fields in Gravity '', in honour of Heinz Dehnen's 65th Birthday and Dietrich Kramer's 60th Birthday. Mexico D.F., Mexico, in press. More info at http://www.fis.cinvestav.mx/~siddh/PHI/
Matos, T. +3 more
openaire +2 more sources
Radiative interactions between new non-Abelian gauge sector and the standard model
Physics Letters B, 2021 We discuss one loop generation of the term connecting gauge fields from a local hidden SU(2)H and the standard model U(1)Y introducing an SU(2)H doublet fermion with non-zero hypercharge and a scalar field in adjoint representation.
Takaaki Nomura, Hiroshi Okada
doaj +1 more source