Gravitational Theories and Dark Matter Dynamics
Summary
The study of gravitational theories and dark matter dynamics lies at the heart of contemporary cosmology and astrophysics. General relativity provides the prevailing framework for gravity, yet observed discrepancies in galaxy rotation curves, cluster mass profiles and the large-scale structure of the Universe point to the existence of non-luminous matter or to the need for modifications of the gravitational law. In the standard cosmological paradigm, cold dark matter is invoked to explain the formation of galaxies and clusters through hierarchical merging, while a cosmological constant drives the accelerated expansion of space. Alternative approaches explore scalar-tensor, vector-tensor or Yukawa-like corrections to Newtonian and relativistic gravity, seeking to reproduce the observed dynamics without additional particle species. Precision tests range from the perihelion precession of stars near supermassive black holes to the timing of binary pulsars and the motions within the Local Group of galaxies. Advances in observational facilities and numerical simulations have tightened constraints on the graviton mass, probed the interplay between dark energy and local dynamics and challenged the universality of dark matter profiles. This field combines fundamental theory with multi-wavelength and multi-messenger astronomy to address one of the most profound questions in modern science: whether the apparent missing mass necessitates new particles or a deeper revision of gravitational law.
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Gravitational Theories and Dark Matter Dynamics publication trend
The graph below shows the total number of articles in gravitational theories and dark matter dynamics across all publications each year (not limited to Nature Index journals).
Technical terms
Cosmological constant (Λ): A uniform energy density filling space that produces accelerated expansion.
Post-Newtonian approximation: A perturbative expansion of general relativity valid in weak gravitational fields and low velocities.
Yukawa potential: A modified gravitational potential featuring an exponential decay term characterised by a coupling constant and a length scale.
Keplerian period: The orbital period of a two-body system under an inverse-square law.
Navarro–Frenk–White profile: A universal density profile describing the distribution of cold dark matter in haloes from simulations.
Scalar-tensor theory: A class of gravity models in which a scalar field contributes to the gravitational interaction alongside the metric tensor.
References
- Constraining Dark Energy from the Local Group Dynamics. The Astrophysical Journal Letters (2023).
- Dark energy as a critical period in binary motion: Bounds from multi-scale binaries. Astronomy & Astrophysics (2024).
- Testing Yukawa cosmology at the Milky Way and M31 galactic scales. European Physical Journal C (2024).
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