It has been suggested for a long time that dark matter would form a density spike around a black hole. However, no promising evidence has been observed...
The newly-discovered galaxy, SPT0418-SE, and its much larger companion, SPT0418-47, reside in a massive dark-matter halo with yet-to-be-discovered neighbors,...
In the HighlY Interactive ParticlE Relics (HYPER) model, some time after the formation of dark matter in the early Universe, the strength of its interaction...
Intracluster light is diffuse light from stars that are gravitationally bound not to individual member galaxies, but to the halo of galaxy clusters. In...
Antimatter particles such as positrons and antiprotons abound in the cosmos. Much less common are light antinuclei, composed of antiprotons and antineutrons,...
The significant gamma-ray emission is coming from a population of millisecond pulsars within the Sagittarius dwarf spheroidal galaxy, an elliptical loop-shaped...
Dark photons are hypothetical particles that could account for observations that cannot be explained by the Standard Model of particle physics.
Dark photons...
To measure the lifetime of a free neutron, physicists take two approaches that should arrive at the same answer: one traps neutrons in a magnetic bottle...
Astronomers from the Australian National University, the University of New South Wales, the University of Canterbury and the University of Tokyo have found...
Dr. Melvin Vopson, a physicist with the School of Mathematics and Physics at the University of Portsmouth, has already published research suggesting that...
The formation of ultrarare supermassive black holes, with masses over one billion solar masses, in the first billion years of the Universe is an open question...
Astronomers from the Netherlands, the United Kingdom and the United States have found no trace of dark matter in AGC 114905, a gas-rich ultra-diffuse galaxy...
A black hole in the center of a dwarf spheroidal galaxy called Leo I is almost as massive as the central black hole of our own Milky Way Galaxy.
The dwarf...
Ultradiffuse galaxies are dwarf galaxies whose stars are spread out over a vast region, resulting in extremely low brightness, making them very difficult...
Singularities play an interesting role in physics, and come in many different varieties, from the mathematically and philosophically challenging to the...
Astrophysical observations show that supermassive black holes exist when the Universe is just 800 million years old after the Big Bang (just 6% of its...
In a new study, astronomers used data from the NASA/ESA Hubble Space Telescope to calculate a more accurate distance to an ultra-diffuse galaxy called...
