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Categories: Computer Science: Quantum Computers, Space: Structures and Features

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Axions are today's most popular candidate for dark matter, and numerous experiments are trying to detect them in microwave cavities where the axion should rarely convert into an electromagnetic wave. But a new simulation of the production of axions in the early universe provides a more refined mass estimate, and higher frequency for the EM wave, that is outside the range of these experiments. The new mass comes from adaptive mesh refinement in supercomputer simulations.

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A research team has provided an important clue to the origin of the element Ytterbium in the Milky Way, by showing that the element largely originates from supernova explosions. The groundbreaking research also provides new opportunities for studying the evolution of our galaxy.

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Astrophysicists for the first time have calculated the original mass and size of a dwarf galaxy that was shredded in a collision with the Milky Way billions of years ago.

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Physicists have made one of the highest performance atomic clocks ever. ­­ Their instrument, known as an optical lattice atomic clock, can measure differences in time to a precision equivalent to losing just one second every 300 billion years and is the first example of a 'multiplexed' optical clock, where six separate clocks can exist in the same environment. Its design allows the team to test ways to search for gravitational waves, attempt to detect dark matter, and discover new physics with clocks.

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Astrophysicists report how, when tiny galaxies collide with bigger ones, the bigger galaxies can strip the smaller galaxies of their dark matter -- matter that we can't see directly, but which astrophysicists think must exist because, without its gravitational effects, they couldn't explain things like the motions of a galaxy's stars.

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In conflict with the current prevailing theory used to describe the universe, a new study suggests the existence of a direct interaction between the elementary particles that make up the dark matter halo and those that make up ordinary matter.

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The moment that debris from destroyed planets impacts the surface of a white dwarf star has been observed. Astronomers saw X-rays from planetary debris heated to a million degrees as it fell onto the dead core of its host star.

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The Standard Model of Cosmology describes how the universe came into being according to the view of most physicists. Researchers have now studied the evolution of galaxies within this model, finding considerable discrepancies with actual observations.

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Astronomers have found a new and original method for measuring the cosmic microwave background's temperature when the Universe was still in its infancy. They confirm in their new study the early cooling of our Universe shortly after the Big Bang and open up new perspectives on the elusive dark energy.

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When building sensor networks, it can be extremely challenging for researchers to determine how the sensors should be arranged to obtain optimal results. New research proposes a new way to quantify the quality of sensor networks, and uses this method to suggest improvements to existing Dark Matter experiments.

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Astronomers have presented a new explanation for the mysterious downward-moving dark voids seen in some solar flares.

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An international team of researchers has published comprehensive data on the search for dark matter using a worldwide network of optical magnetometers. According to the scientists, dark matter fields should produce a characteristic signal pattern that can be detected  by correlated measurements at multiple stations of the GNOME network.

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Using observations of Centaurus A, a nearby elliptical galaxy, obtained with the Gaia space telescope and ground-based instruments under the PISCeS survey, a team of astronomers presents an unprecedented number of globular cluster candidates in the outer regions of the galaxy. The findings provide astronomers with an even more detailed picture of galactic architecture and history of collisions and mergers.

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Astronomers are one step closer to revealing the properties of dark matter enveloping our Milky Way galaxy, thanks to a new map of twelve streams of stars orbiting within our galactic halo.

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Astrophysicists suggest that primordial black holes account for all dark matter in the universe.

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Unlike our Sun, most stars live with a companion. Sometimes, two come so close that one engulfs the other -- with far-reaching consequences. When astronomers used the telescope Alma to study 15 unusual stars, they were surprised to find that they all recently underwent this phase. The discovery promises new insight on the sky's most dramatic phenomena -- and on life, death and rebirth among the stars.

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A cosmic object originally classified as a gas and dust cloud actually consists of three stars and could resolve a controversy among astronomers.

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A new concept has been developed that has the potential to assist new instruments in the investigation of fundamental science topics such as gravitational waves and dark matter.

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Astronomers have found no trace of dark matter in the galaxy AGC 114905, despite taking detailed measurements over a course of forty hours with state-of-the-art telescopes.

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Astronomers have discovered an unusually massive black hole at the heart of one of the Milky Way's dwarf satellite galaxies, called Leo I. Almost as massive as the black hole in our own galaxy, the finding could redefine our understanding of how all galaxies -- the building blocks of the universe -- evolve.