Articles tagged with Dark Matter
Researchers at UCLA created a 30-cm diameter plasma laser by applying a nonuniform magnetic field. Meanwhile, scientists have made rapid advances in detecting dark matter using weak gravitational lensing experiments. A paper also examines the emerging behavior of complex systems in electronic bidding on online auction sites like eBay.
The study provides strong support for the popular cold dark matter model of the universe, suggesting that galaxies are surrounded by massive, three-dimensional halos. The team measured the shapes of over 1.5 million distant galaxies using weak gravitational lensing, revealing that dark matter halos extend far beyond visible stars.
The team reconstructed a mass map of the galaxy cluster using NASA/ESA Hubble Space Telescope data, tracing dark matter's distribution with respect to galaxies. The study reveals that dark matter clumps together in certain regions, supporting the idea that clusters assemble through the merger of smaller groups.
Physicists at the University of California, Irvine have discovered superweakly interacting massive particles (superWIMPs) that may constitute up to one-quarter of the universe's mass. These new particles are predicted to be stable and could provide an alternative explanation for dark matter.
Scientists using Whipple Observatory gamma-ray telescope discover energetic gamma-ray flares from active galaxies, revealing relativistic jets and compact emission regions. The study also holds promise to reveal nature of 'dark matter' and 'dark energy', which dominate universe's mass budget.
Astronomers have found evidence for dark dwarf galaxies that support the theory of cold dark matter. The study analyzed gravitational lensing effects on distant galaxies, revealing the presence of hundreds of invisible dwarf galaxies surrounding large galaxies.
Researchers from Ohio State University have successfully measured the mass of a gravitational microlens in a dim binary star system 6,500 light-years away. This technique could be used to detect dark matter within our galaxy and help explain the missing mass of the universe.
Astronomers have shed new light on dark matter distribution by tracing it closely to galaxy patterns. They found that dark matter is distributed in a parallel pattern to galaxies and makes up about seven times more mass than ordinary matter.
Researchers have detected a massive compact halo object, or MACHO, using gravitational microlensing event data from the Hubble Space Telescope and European Southern Observatory's Very Large Telescope. The object is estimated to be 5-10% the mass of the sun and is thought to comprise up to 50% of the Milky Way's dark matter content.
A team of astronomers has directly observed a Dark Matter object, confirming the theory that it consists of small, faint stars in galaxies like our Milky Way. The detection was made using the Hubble Space Telescope and the European Southern Observatory's Very Large Telescope.
Researchers from the Lawrence Livermore National Laboratory have detected a dark matter object in the Milky Way using microlensing light data and spectroscopy. The team measured the mass, distance, and velocity of the MACHO, a small star with a mass between 5% and 10% of the sun's mass at a distance of 600 light-years.
The universe consists mostly of mysterious dark matter and dark energy, which make up 95% of its mass. Ordinary matter accounts for only 5%, a finding confirmed by observations of the cosmic microwave background.
Researchers used supercomputer simulations to test two competing scenarios explaining high-redshift galaxies. The collisional starburst scenario, which suggests small galaxies trigger intense bursts of star formation, received strong support from the simulation results.
The Inner Space/Outer Space II Symposium will explore questions of the hour in particle astrophysics, including the origins of the universe and dark matter. The four-day agenda includes presentations on Extra Dimensions, the Accelerating Universe, and Beyond the Standard Models.
Qaisar Shafi's research proposes two distinct components of dark matter, with the 'cold' component residing in galaxy haloes and the 'hot' component gravitationally trapped by large-scale structures. This new understanding could guide experimental work and incorporate dark matter into models of the universe.
A team of astronomers used a supercomputer to simulate the growth of cosmic structure in a region comparable to the entire observable Universe. The simulation revealed patterns of dark matter walls and filaments, as well as massive voids and giant galaxy clusters.
Case Western Reserve University physicist Glenn Starkman has received a four-year, $200,000 NSF grant to study the shape of the universe by mapping temperature fluctuations throughout space. He aims to develop new techniques to detect dark matter, which is believed to comprise much of the mass in the universe.
Researchers have found evidence of a 'missing' form of ordinary matter, known as baryonic matter, that was thought to be needed to form the cosmos billions of years ago. The findings suggest that this matter was spread throughout intergalactic space in a diffuse gas of hydrogen and helium atoms.