Galaxy dark matter halos as a research area focuses on the structure, composition, and dynamical role of extended, non-luminous mass distributions surrounding galaxies, investigated primarily through gravitational effects such as rotation curves, strong and weak lensing, satellite kinematics, and large-scale structure. This field addresses halo density profiles, concentration–mass relations, subhalo populations, and their dependence on cosmological parameters and dark matter models (e.g., cold vs. warm). It also studies baryon–halo interactions, including feedback-driven core formation, galaxy–halo connection (abundance matching, halo occupation), and the impact of halos on galaxy formation, evolution, and environmental processes within the cosmological context.
Astronomers at The University of Manchester have played a leading role in the discovery of a new cosmic object that is much larger than anything astronomers have seen before in the distant universe. This new discovery captures ...
Astronomy
Jan 28, 2026
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81
Computer simulations carried out by astronomers from the University of Groningen in collaboration with researchers from Germany, France and Sweden show that most of the (dark) matter beyond the Local Group of galaxies (which ...
Astronomy
Jan 27, 2026
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1447
Hypervelocity stars have, since the 1920s, been an important tool that allows astronomers to study the properties of the Milky Way galaxy, such as its gravitational potential and the distribution of matter. Now astronomers ...
Galaxy clusters are the most massive objects in the universe held together by gravity, containing up to several thousand individual galaxies and huge reservoirs of superheated, X-ray-emitting gas. The mass of this hot gas ...
Astronomy
Dec 10, 2025
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34
Dark matter and its impact on cosmology have puzzled physicists for nearly a century. At Perimeter Institute, two researchers are trying to better understand how one potential dark matter candidate, self-interacting dark ...
Astronomy
Dec 1, 2025
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70
A cosmological simulation study by researchers from the Shanghai Astronomical Observatory of the Chinese Academy of Sciences has systematically revealed, for the first time, how the interaction between dark matter and dark ...
Astronomy
Nov 28, 2025
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197
Small and unassuming, Segue 1 is a nearby dwarf galaxy containing only a handful of stars—too few to provide the gravity needed to keep itself from scattering into space. Like other dwarf galaxies, it was long believed that ...
Astronomy
Oct 27, 2025
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154
An international team of researchers led by the Leibniz Institute for Astrophysics Potsdam (AIP) has shed light on a decades-long debate about why galaxies spin faster than expected—and whether this behavior is caused by ...
Astronomy
Oct 27, 2025
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264
New research shows that dark matter has a different distribution in our galaxy than previously thought, and that advances dark matter's status as a potential source of the observed gamma ray excess in the Milky Way's center. ...
General Physics
Oct 19, 2025
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739
The nature of dark matter remains one of the greatest mysteries in cosmology. Within the standard framework of non-collisional cold dark matter (CDM), various models are considered: WIMPs (Weakly Interacting Massive Particles, ...
General Physics
Oct 18, 2025
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