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Categories: Ecology: Invasive Species, Space: Structures and Features
Published Mathematical discovery could shed light on secrets of the Universe
(via sciencedaily.com) How can Einstein's theory of gravity be unified with quantum mechanics? It is a challenge that could give us deep insights into phenomena such as black holes and the birth of the universe. Now, a new article presents results that cast new light on important challenges in understanding quantum gravity.
Published Event horizons are tunable factories of quantum entanglement
(via sciencedaily.com) Original source Physicists have leveraged quantum information theory techniques to reveal a mechanism for amplifying, or 'stimulating,' the production of entanglement in the Hawking effect in a controlled manner. Furthermore, these scientists propose a protocol for testing this idea in the laboratory using artificially produced event horizons.
Published Dark energy: Neutron stars will tell us if it's only an illusion
(via sciencedaily.com) Scientists provide the first simulation of neutron star collisions in extensions of general relativity relevant for cosmology, offering a new approach to test gravity.
Published 'Closest black hole' system found to contain no black hole
(via sciencedaily.com) Original source In 2020, astronomers reported the closest black hole to Earth, located just 1000 light-years away in the HR 6819 system. But the results of their study were contested by other researchers. In a new paper, these two teams have united to report that there is in fact no black hole in HR 6819, which is instead a 'vampire' two-star system in a rare and short-lived stage of its evolution.
Published New simulations refine axion mass, refocusing dark matter search
(via sciencedaily.com) 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.
Published Astronomers map mysterious element in space
(via sciencedaily.com) 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.
Published Ancient dwarf galaxy reconstructed with MilkyWay@home volunteer computer
(via sciencedaily.com) 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.
Published Ultraprecise atomic clock poised for new physics discoveries
(via sciencedaily.com) 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.
Published How galaxies can exist without dark matter
(via sciencedaily.com) 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.
Published Distant galaxies and the true nature of dark matter
(via sciencedaily.com) 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.
Published Debris from disintegrating planets hurtling into white dwarfs across the galaxy
(via sciencedaily.com) 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.
Published Too many disk galaxies than theory allows
(via sciencedaily.com) 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.
Published Shadow of cosmic water cloud reveals the temperature of the young universe
(via sciencedaily.com) 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.
Published Assessing and optimizing the quality of sensor networks
(via sciencedaily.com) 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.
Published Scientists explain mysterious finger-like features in solar flares
(via sciencedaily.com) Astronomers have presented a new explanation for the mysterious downward-moving dark voids seen in some solar flares.
Published Worldwide coordinated search for dark matter
(via sciencedaily.com) 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.
Published New treasure trove of globular clusters holds clues about galaxy evolution
(via sciencedaily.com) 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.
Published Twelve for dinner: The Milky Way’s feeding habits shine a light on dark matter
(via sciencedaily.com) 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.
Published Are black holes and dark matter the same?
(via sciencedaily.com) Astrophysicists suggest that primordial black holes account for all dark matter in the universe.
Published Secret embraces of stars revealed by Alma
(via sciencedaily.com) 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.