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Galaxies Current Events and Galaxies News from Brightsurf

Galaxies Current Events and Galaxies News Events, Discoveries and Articles from Brightsurf

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Observatory detects extragalactic cosmic rays hitting the Earth

Fri, 22 Sep 17 00:03:10 -0700

Fifty years ago, scientists discovered that the Earth is occasionally hit by cosmic rays of enormous energies. Since then, they have argued about the source of those ultra-high energy cosmic rays -- whether they came from our galaxy or outside the Milky Way. The answer is a galaxy or galaxies far, far away, according to a report published Sept. 22 in Science by the Pierre Auger Collaboration.

Study confirms cosmic rays have extragalactic origins

Thu, 21 Sep 17 00:12:20 -0700

International collaboration by scientists with the Pierre Auger Observatory confirms that most of the highest energy cosmic rays that reach the Earth come from outside the Milky Way galaxy.

Ultra-high-energy cosmic rays come from galaxies far, far away

Thu, 21 Sep 17 00:11:50 -0700

A new study reveals that cosmic rays with the highest energies that make their way to Earth originated from outside our Milky Way galaxy.

Detecting cosmic rays from a galaxy far, far away

Thu, 21 Sep 17 00:12:30 -0700

Where do cosmic rays come from? Solving a 50-year-old mystery, a collaboration of researchers has discovered it's much farther than the Milky Way.

Is the Milky Way an 'outlier' galaxy? Studying its 'siblings' for clues

Wed, 20 Sep 17 00:03:10 -0700

The most-studied galaxy in the universe -- the Milky Way -- might not be as 'typical' as previously thought, according to a new study. Early results from the Satellites Around Galactic Analogs (SAGA) Survey indicate that the Milky Way's satellites are much more tranquil than other systems of comparable luminosity and environment. Many satellites of those 'sibling' galaxies are actively pumping out new stars, but the Milky Way's satellites are mostly inert, the researchers found.

Discovery of the closest binary supermassive black hole system in the galaxy NGC 7674

Tue, 19 Sep 17 00:14:10 -0700

Scientists from NCRA-TIFR, Pune, and RIT, USA, have discovered the closest ever binary supermassive black hole system in a spiral galaxy NGC 7674, located about 400 million light years from Earth. The apparent separation of the two black holes in the binary system is less than one light year. This is direct observational proof of the existence of close supermassive black hole binary systems inside galaxies, which are potential sources of gravitational waves.

Scientists from MSU have invented a new way to 'weigh' intergalactic black holes

Tue, 19 Sep 17 00:08:20 -0700

Astrophysicists from Moscow State University have found a new way to estimate the mass of supermassive black holes outside our galaxy, even if these holes are barely detectable. The results of the study were published in the Astronomy and Astrophysics journal

Secrets of bright, rapidly spinning star revealed

Mon, 18 Sep 17 00:09:10 -0700

Almost 50 years after it was first predicted that rapidly rotating stars would emit polarized light, a UNSW Sydney-led team of scientists has succeeded in observing the phenomenon for the first time. They used a highly sensitive piece of equipment designed and built at UNSW and attached to the Anglo-Australian Telescope at Siding Spring Observatory in western NSW to detect the polarized light from Regulus, one of the brightest stars in the night sky.

When radio galaxies collide, supermassive black holes form tightly bound pairs

Mon, 18 Sep 17 00:15:20 -0700

Supermassive black holes found in the centers of galaxies can form gravitationally bound pairs when galaxies merge, according to a study published in the Sept. 18 issue of Nature Astronomy.

Physicists offer explanation for diverse galaxy rotations

Thu, 14 Sep 17 00:12:20 -0700

A University of California, Riverside-led team of physicists has found a simple and viable explanation for the diversity observed in galactic rotations. Hai-Bo Yu and colleagues report that diverse galactic-rotation curves, a graph of rotation speeds at different distances from the center, can be naturally explained if dark matter particles are assumed to strongly collide with one another in the inner halo, close to the galaxy's center -- a process called dark matter self-interaction.

New supernova analysis reframes dark energy debate

Wed, 13 Sep 17 00:01:10 -0700

The accelerating expansion of the Universe may not be real, but could just be an apparent effect, according to new research published in the journal Monthly Notices of the Royal Astronomical Society. The new study -- by a group at the University of Canterbury in Christchurch, New Zealand -- finds the fit of Type Ia supernovae to a model universe with no dark energy to be very slightly better than the fit to the standard dark energy model.

Scientists use mismatch in telescopic data to get a handle on quasars and their 'tails'

Tue, 12 Sep 17 00:15:30 -0700

Scientists compared the data on the coordinates of quasars obtained by Gaia and VLBI and suggested a method for revealing structure indirectly by means of combining the data from existing telescopes. Moreover, the precision they've got is superior to what is possible with ordinary optical telescopes and even with Hubble.

Astronomers spun up by galaxy-shape finding

Mon, 11 Sep 17 00:15:10 -0700

For the first time astronomers have measured how a galaxy's spin affects its shape -- something scientists have tried to do for 90 years -- using a sample of 845 galaxies. Because a galaxy's shape is the result of past events such as merging with other galaxies, knowing its shape also tells us about the galaxy's history. The team made its findings with SAMI (the Sydney-AAO Multi-object Integral field unit), a game-changing instrument.

Explosive birth of stars swells galactic cores

Sun, 10 Sep 17 00:03:10 -0700

Astronomers found that active star formation upswells galaxies, like yeast helps bread rise. Using three powerful telescopes on the ground and in orbit, they observed galaxies from 11 billion years ago and found explosive formation of stars in the cores of galaxies. This suggests that galaxies can change their own shape without interaction with other galaxies.

Exchanges of identity in deep space

Thu, 07 Sep 17 00:15:00 -0700

By reproducing the complexity of the cosmos through unprecedented simulations, a new study highlights the importance of the possible behaviour of very high energy photons. In their journey through intergalactic magnetic fields, they could be transformed into axions and thus avoid being absorbed

Does the organic material of comets predate our solar system?

Wed, 06 Sep 17 00:12:00 -0700

The Rosetta space probe discovered a large amount of organic material in the nucleus of comet 'Chury.' In an article published by MNRAS on Aug. 31, 2017, two French researchers advance the theory that this matter has its origin in interstellar space and predates the birth of the solar system.

UCLA physicists propose new theories of black holes from the very early universe

Fri, 01 Sep 17 00:05:50 -0700

'Primordial black holes,' believed to have formed shortly after the Big Bang, might explain how heavy elements such as gold, platinum and uranium came to be, UCLA physicists report.

ALMA finds huge hidden reservoirs of turbulent gas in distant galaxies

Wed, 30 Aug 17 00:07:10 -0700

ALMA has been used to detect turbulent reservoirs of cold gas surrounding distant starburst galaxies. By detecting CH+ for the first time in the distant universe this research opens up a new window of exploration into a critical epoch of star formation. The presence of this molecule sheds new light on how galaxies manage to extend their period of rapid star formation. The results appear in the journal Nature.

Researchers propose how the universe became filled with light

Wed, 30 Aug 17 00:07:00 -0700

University of Iowa researchers have a new explanation for how the universe changed from darkness to light. They propose that black holes within galaxies produce winds strong enough to fling out matter that punctures holes in galaxies, allowing light to escape.

Magnetic fields in distant galaxy are new piece of cosmic puzzle

Wed, 30 Aug 17 00:16:00 -0700

Astronomers have measured magnetic fields in a galaxy 4.6 billion light-years away -- a big clue to understanding how magnetic fields formed and evolved over cosmic time.

Record-breaking galaxy 5 billion light-years away shows we live in a magnetic universe

Mon, 28 Aug 17 00:07:30 -0700

A team of astronomers has observed the magnetic field of a galaxy five billion light-years from Earth. The galaxy is the most distant in which a coherent magnetic field has been observed and provides important insight into how magnetism in the universe formed and evolved.

VLA reveals distant galaxy's magnetic field

Mon, 28 Aug 17 00:06:40 -0700

A chance combination of a gravitational lens and polarized waves coming from a distant quasar gave astronomers the tool needed to make a measurement important to understanding the origin of magnetic fields in galaxies.

Supermassive black holes feed on cosmic jellyfish

Wed, 16 Aug 17 00:07:40 -0700

Observations of 'Jellyfish galaxies' with ESO's Very Large Telescope have revealed a previously unknown way to fuel supermassive black holes. It seems the mechanism that produces the tentacles of gas and newborn stars that give these galaxies their nickname also makes it possible for the gas to reach the central regions of the galaxies, feeding the black hole that lurks in each of them and causing it to shine brilliantly. The results appeared today in the journal Nature.

Cosmic magnifying lens reveals inner jets of black holes

Tue, 15 Aug 17 00:07:50 -0700

Jet material ejected from a black hole is magnified in new observations from Caltech's Owens Valley Radio Observatory.

A fleeting blue glow

Mon, 14 Aug 17 00:03:20 -0700

In the 2009 film 'Star Trek,' a supernova hurtles through space and obliterates a planet unfortunate enough to be in its path. Fiction, of course, but it turns out the notion is not so farfetched.

International team of researchers redefines cosmic velocity web

Mon, 14 Aug 17 00:14:40 -0700

The cosmic web -- the distribution of matter on the largest scales in the universe -- has usually been defined through the distribution of galaxies. Now, a new study by a team of astronomers from France, Israel and Hawaii demonstrates a novel approach. Instead of using galaxy positions, they mapped the motions of thousands of galaxies.

Ohio Supercomputer Center helps researchers map invisible universe

Thu, 10 Aug 17 00:07:40 -0700

The Ohio Supercomputer Center played a critical role in helping researchers reach a milestone mapping the growth of the universe from its infancy to present day.

Galactic winds push researchers to probe galaxies at unprecedented scale

Thu, 10 Aug 17 00:15:50 -0700

After using the Titan supercomputer at Oak Ridge National Laboratory to rule out a potential mechanism for galactic wind, UC Santa Cruz astrophysicist Brant Robertson and University of Arizona graduate student Evan Schneider, now a Hubble Fellow at Princeton University, are aiming to generate nearly a trillion-cell simulation of an entire galaxy, which would be the largest simulation of a galaxy ever.

Why massive galaxies don't dance in crowds

Wed, 09 Aug 17 00:04:00 -0700

Australian scientists have discovered why heavyweight galaxies living in a dense crowd of galaxies tend to spin more slowly than their lighter neighbours. Contrary to earlier thinking, the spin rate of the galaxy is determined by its mass, rather than how crowded its neighbourhood is.

New theory on the origin of dark matter

Tue, 08 Aug 17 00:04:00 -0700

Scientists at Johannes Gutenberg University Mainz in Germany have come up with a new theory on how dark matter may have been formed shortly after the origin of the universe. This new model proposes an alternative to the WIMP paradigm that is the subject of various experiments in current research.

UCI celestial census indicates that black holes pervade the universe

Tue, 08 Aug 17 00:03:50 -0700

After conducting a cosmic inventory of sorts to calculate and categorize stellar-remnant black holes, astronomers from the University of California, Irvine have concluded that there are probably tens of millions of the enigmatic, dark objects in the Milky Way -- far more than expected.

Primordial black holes may have helped to forge heavy elements

Fri, 04 Aug 17 00:09:00 -0700

Astronomers like to say we are the byproducts of stars, stellar furnaces that long ago fused hydrogen and helium into the elements needed for life through the process of stellar nucleosynthesis.

NRL brightens perspective of mysterious mini-halos

Thu, 03 Aug 17 00:05:40 -0700

The US Naval Research Laboratory (NRL), working in conjunction with the National Radio Astronomy Observatory (NRAO), employs the upgraded Karl G. Jansky Very Large Array (JVLA) to 'peer' into the cluster of galaxies in the constellation Perseus, 250 million light-years from Earth.

Standard model of the universe withstands most precise test by Dark Energy Survey

Thu, 03 Aug 17 00:12:00 -0700

Astrophysicists have a fairly accurate understanding of how the universe ages: that's the conclusion of new results from the Dark Energy Survey (DES), a large international science collaboration, including researchers from the Department of Energy's SLAC National Accelerator Laboratory, that put models of cosmic structure formation and evolution to the most precise test yet.

Running out of gas: Gas loss puts breaks on stellar baby boom

Wed, 02 Aug 17 00:02:30 -0700

Astronomers observed a galaxy cluster 9.4 billion light-years away using the ALMA radio telescope array and found evidence that hot gas strips away the cold gas in the member galaxies. Since cold gas is the material for forming new stars, removing the cold gas inhibits star formation. This result is key to understanding the declining birthrate of stars throughout the history of the Universe and the evolutionary process of galaxy clusters.

Quasars may answer how starburst galaxies were extinguished

Mon, 31 Jul 17 00:14:00 -0700

University of Iowa astronomers have located quasars inside four dusty starburst galaxies. The observations suggest quasars may starve this type of galaxy of energy needed to form stars. Results published in the Astrophysical Journal.

Astronomers discover 'heavy metal' supernova rocking out

Mon, 31 Jul 17 00:01:20 -0700

A team of astronomers led by the Harvard-Smithsonian Center for Astrophysics has discovered that an extraordinarily bright supernova occurred in a surprising location. This 'heavy metal' supernova discovery challenges current ideas of how and where such super-charged supernovas occur. In the past decade, astronomers have discovered about 50 supernovas, out of the thousands known, that are particularly powerful. Following the recent discovery of one of these, the researchers have uncovered vital clues about where some of these extraordinary objects come from.

Citizen science volunteers driven by desire to learn

Mon, 31 Jul 17 00:11:40 -0700

People who give up their time for online volunteering are mainly motivated by a desire to learn, a new study has found. The research surveyed volunteers on 'citizen science' projects and suggests that this type of volunteering could be used to increase general knowledge of science within society.

Hubble Friday

Fri, 28 Jul 17 00:09:50 -0700

This beautiful clump of glowing gas, dark dust and glittering stars is the spiral galaxy NGC 4248, located about 24 million light-years away in the constellation of Canes Venatici (The Hunting Dogs).

Galactic David and Goliath

Thu, 27 Jul 17 00:08:20 -0700

The gravitational dance between two galaxies in our local neighbourhood has led to intriguing visual features in both as witnessed in this new NASA/ESA Hubble Space Telescope image. The tiny NGC 1510 and its colossal neighbour NGC 1512 are at the beginning of a lengthy merger, a crucial process in galaxy evolution. Despite its diminutive size, NGC 1510 has had a significant effect on NGC 1512's structure and amount of star formation.

Astrophysicists map out the light energy contained within the Milky Way

Thu, 27 Jul 17 00:05:00 -0700

For the first time, a team of scientists have calculated the distribution of all light energy contained within the Milky Way, which will provide new insight into the make-up of our galaxy and how stars in spiral galaxies such as ours form. The study is published in the journal Monthly Notices of the Royal Astronomical Society.

Using powerful Dark Energy Camera, scientists reach the cosmic dawn

Wed, 26 Jul 17 00:13:30 -0700

Arizona State University astronomers Sangeeta Malhotra and James Rhoads, working with international teams in Chile and China, have discovered 23 young galaxies, seen as they were 800 million years after the Big Bang. The results from this sample have been recently published in the Astrophysical Journal.

Milky Way's origins are not what they seem

Wed, 26 Jul 17 00:01:40 -0700

In a first-of-its-kind analysis, Northwestern University astrophysicists have discovered that up to half of the matter in our Milky Way galaxy may come from distant galaxies. As a result, each one of us may be made in part from extragalactic matter. Using supercomputer simulations, the researchers found an unexpected mode for how galaxies acquired matter: intergalactic transfer. Supernova explosions eject copious amounts of gas from galaxies, causing atoms to be transported from one galaxy to another via powerful galactic winds.

Cosmologists produce new maps of dark matter dynamics

Tue, 25 Jul 17 00:10:00 -0700

New maps of dark matter dynamics in the Universe have been produced by a team of international cosmologists.

Dark matter is likely 'cold,' not 'fuzzy,' scientists report after new simulations

Mon, 24 Jul 17 00:06:30 -0700

Scientists have used data from the intergalactic medium -- the vast, largely empty space between galaxies -- to narrow down what dark matter could be.

Flashes of light on the dark matter

Fri, 21 Jul 17 00:05:40 -0700

A web that passes through infinite intergalactic spaces, a dense cosmic forest illuminated by very distant lights and a huge enigma to solve. These are the picturesque ingredients of a scientific research -- carried out by an international team composed of researchers from SISSA and the ICTP in Trieste, the Institute of Astronomy of Cambridge and the University of Washington - that adds an important element for understanding one of the fundamental components of our Universe: the dark matter.

Superluminous supernova marks the death of a star at cosmic high noon

Fri, 21 Jul 17 00:06:30 -0700

The death of a massive star in a distant galaxy 10 billion years ago created a rare superluminous supernova, one of the most distant ever discovered. The brilliant explosion, more than three times as bright as the 100 billion stars of our Milky Way galaxy combined, occurred about 3.5 billion years after the big bang at a period known as 'cosmic high noon,' when the rate of star formation in the universe reached its peak.

Spiral arms allow school children to weigh black holes

Thu, 20 Jul 17 00:08:50 -0700

Astronomers from Swinburne University of Technology, Australia, and the University of Minnesota Duluth, USA, have provided a way for armchair astronomers, and even primary school children, to merely look at a spiral galaxy and estimate the mass of its hidden, central black hole. The research was supported by the Australian Research Council and has been published in the journal Monthly Notices of the Royal Astronomical Society.

Scientists get best measure of star-forming material in galaxy clusters in early universe

Thu, 20 Jul 17 00:09:40 -0700

The international Spitzer Adaptation of the Red-sequence Cluster Survey (SpARCS) collaboration based at the University of California, Riverside has combined observations from several of the world's most powerful telescopes to carry out one of the largest studies yet of molecular gas -- the raw material which fuels star formation throughout the universe -- in three of the most distant clusters of galaxies ever found, detected as they appeared when the universe was only four billion years old.

Scientists reveal new connections between small particles and the vast universe

Wed, 19 Jul 17 00:02:40 -0700

Are density distributions of the vast universe and the nature of smallest particles related? In a recent research, scientists from HKUST and Harvard University revealed the connection between those two aspects, and argued that our universe could be used as a particle physics 'collider' to study the high energy particle physics. Their findings mark the first step of cosmological collider phenomenology and pave the way for future discovery of new physics unknown yet to mankind.