Articles tagged with Black Holes
Astronomers using NASA's Rossi X-ray Timing Explorer (RXTE) satellite have confirmed that most of the X-rays in a binary system come from the dual, oppositely directed jets around a black hole. The study provides new insights into the complex behavior of these systems and their extreme environments.
Researchers in China develop electromagnetic absorbing device for microwave frequencies using metamaterials, demonstrating an absorption rate of 99%. The device traps and converts electromagnetic waves into heat, exhibiting properties similar to an 'electromagnetic black hole',
Data from NASA's Swift satellite have solved a decades-long mystery about black holes emitting vast amounts of energy. The survey confirms that galaxies colliding trigger the 'lighting up' of supermassive black holes.
A team of researchers discovered that a supermassive black hole at the center of the most massive local galaxy, M87, is displaced from its expected location. The finding suggests that supermassive black holes may be commonly offset from their host galaxy centers due to previous mergers or interactions with jets.
Researchers found that the supermassive black hole at the center of M87 is displaced from its expected position, likely due to a previous merger or the iconic jet's push. This discovery could have significant implications for understanding galaxy formation and evolution.
The Andromeda Galaxy's supermassive black hole, M31*, is surprisingly quiet and faint in X-ray light, deviating from expectations. A decade-long study by Chandra reveals that the black hole underwent a significant outburst of X-rays in 2006.
A study by researchers at The University of Nottingham reveals the devastating impact of supermassive black holes on galaxies. These behemoths strip massive galaxies of cool gases required for new stars, causing ageing red giants to dwindle in existence.
Theoretical physicist Nikodem Poplawski proposes that our universe could be born from the interior of an Einstein-Rosen bridge (wormhole) within a black hole, potentially resolving issues with the Big Bang theory and black hole information loss. This model may also explain cosmic inflation.
Physicists at Harvard University create an atomic-scale black hole by accelerating cold rubidium atoms towards a charged carbon nanotube. The experiment demonstrates the merging of cold-atom and nanoscale science, opening doors to new applications in materials and electronics.
Astronomers at Yale University have discovered that supermassive black holes undergo huge growth spurts during galactic collisions and remain veiled in dust for extended periods. The team found that these growing black holes spend about half their lives hidden behind a 'veil' of dust.
Astronomers have discovered two ancient supermassive black holes that provide insight into the universe's early evolution. The objects lack characteristic signatures of hot dust, suggesting they formed in a dust-free medium at the earliest stages of universe formation.
Astronomers have observed fast-growing primitive black holes at the center of distant galaxies, weighing between 100 million and 10 billion solar masses. The researchers found that these black holes are active and growing, and their growth is linked to the formation of stars in the galaxy.
The Hubble Multi-Cycle Treasury Program will survey the first third of cosmic time, observing over 250,000 distant galaxies to understand galaxy formation and evolution. The project aims to study the earliest stages in the formation of supermassive black holes and find distant supernovae important for understanding dark energy.
Researchers found that gamma rays originate closer to one light year from black holes than expected, and the jet curves as it travels away from the black hole. This new understanding of blazar jets requires a rethinking of their structure and poses challenges for theorists trying to construct such jets.
Kelly Holley-Bockelmann's NSF award will support her research on supermassive black holes and the university's innovative program for underrepresented minorities in physics. The grant also funds initiatives to recruit and retain students from underrepresented groups.
Astronomers study the galaxy's most active black-hole binary, revealing a dramatic change in the accretion disk's behavior. The Suzaku observations show that at low brightness, the inner edge of the disk retreats up to 600 miles from the black hole.
Astronomers have identified the brightest source in the gamma-ray sky, with galaxy 3C 454.3 emitting flares 10 times brighter than its summer levels. The blazar's exceptional brightness is due to its orientation, with a jet aimed straight at Earth.
Astronomer Dan Dicken uses Spitzer Space Telescope data to study heat energy from distant active galaxies, aiming to distinguish between starbursts and supermassive black holes. His research could help understand galaxy evolution, co-evolution of black holes and their host galaxies, and the diversity of active galactic nuclei.
The Fermi Gamma-ray Space Telescope has detected high-energy gamma-rays from the enigmatic binary system Cygnus X-3, a genuine microquasar. The system's unique properties and strong emission across various wavelengths offer new insights into how high-energy particles are accelerated and move through jets.
A new study led by CU-Boulder suggests that the first large black holes in the universe formed and grew inside gigantic, starlike cocoons. These cocoons likely prevented surrounding gases from being blown away and smothered powerful x-ray radiation.
Astronomers have found a middleweight black hole in galaxy NGC 5408, with masses between 1,000 and 9,000 solar masses. The discovery was made using the Swift satellite and XMM-Newton observatory, which detected quasi-periodic oscillations from the black hole.
Researchers at RIT are using supercomputers to study the massive dark objects, simulating what cannot be seen directly. The grants and allocations will enhance their access to sophisticated computer power, staying at the forefront of scientific computation.
The mosaic image reveals stellar evolution, bright young stars, and a supermassive black hole at the Galactic center. Giant X-ray flares from Sgr A* have occurred about 50 and 300 years earlier.
Mathematicians at the University of Leeds propose that black holes are directly responsible for producing gamma ray bursts, contradicting the orthodox model. The theory suggests that rotating black holes can devour nearby stars, creating long-lasting jets of plasma that produce the high-energy radiation.
A team led by Professor Stephen Eikenberry captured the first images of the cosmos using a UF-designed camera/spectrometer attached to the Gemini South telescope in Chile. The instrument, FLAMINGOS-2, will enable accurate tracking of black hole growth and evolution over 4 billion years.
Astronomers have discovered a giant galaxy surrounding the most distant black hole ever found, 12.8 billion light-years from Earth. The galaxy is as large as the Milky Way and harbors a supermassive black hole with at least a billion times more matter than our sun.
Dartmouth researchers have proposed a new method to create tiny quantum-sized black holes in the laboratory, allowing for better understanding of Hawking radiation. The SQUID-based setup enables exploration of analogue quantum gravitational effects and may be more straightforward for detecting Hawking radiation.
A NASA/Goddard Space Flight Center simulation found that the universe's first black holes grew slowly due to a lack of gas, contrary to expectations. The findings have significant implications for understanding galaxy formation and the role of black holes in shaping the universe.
Recent simulations by astrophysicists reveal that the first black holes in the universe grew slowly and were deprived of gas, contradicting popular theories. The simulations suggest that these early black holes may have played a more complex role in the formation of supermassive black holes observed today.
Researchers, including Dr. Dentcho Genov, successfully mimicked celestial mechanics using artificial optic materials to study phenomena around black holes and other celestial objects. The team's work has implications for technology, such as the 'invisibility cloak,' and confirms Louisiana Tech's contribution to vital science discoveries.
Researchers found that turbulence created by material ejected from supermassive black holes' disks prevents cooling gas from forming stars. The discovery explains a long-standing mystery in galaxy cluster physics.
Using a worldwide VLBA collaboration, scientists pinpoint the origin of superenergetic gamma rays coming from M87's core near the supermassive black hole. The discovery sheds light on the mechanisms powering galaxies' energetic jets.
Researchers have located the site of relativistic particle acceleration in galaxy M 87, where particles are accelerated to extreme energies and emit gamma rays with trillion-electron Volt energies. The discovery was made possible by combining high-resolution radio and gamma-ray observations using three arrays of telescopes.
A new class of black hole has been discovered, with masses between 100 and several hundred thousand times that of the Sun. The discovery, made by an international team of astronomers using XMM-Newton observations, confirms the existence of intermediate mass black holes.
A Kansas State University professor is studying new theories about the origin and future of life in the universe. He suggests that artificial black holes could play a part in the evolution of life and potentially spread it throughout the galaxy.
Astronomers at the University of Warwick have discovered that the 2006 stellar explosion SCP 06F6 bears remarkable resemblance to extremely carbon-rich stars. The object's unusual characteristics suggest it may be a new type of supernova, with properties distinct from normal Type II supernovae.
Astronomers observe a high-energy apparition, known as an X-ray ghost, lingering around a supermassive black hole in the Chandra Deep Field-North. The source, HDF 130, is 10 billion light years away and existed 3 billion years after the Big Bang.
Using XMM-Newton's new data, astronomers have mapped the region around a supermassive black hole, estimating its mass at 3-5 million solar masses. The observations also reveal rapid spinning and accretion rates that verge on theoretical limits.
New calculations suggest hundreds of massive rogue black holes are left over from the early universe, potentially wandering the Milky Way's outer reaches. These relics could provide clues about galaxy formation history and the formation of black holes in the early universe.
Researchers discovered a mechanism for regulating the rate at which stellar-mass black holes grow, suggesting that they can regulate themselves. The study found that the black hole in GRS 1915+105 toggles between expelling mass via a jet and a wind from its accretion disk.
Scientists have directly observed a gigantic star blowing up, supporting the idea that massive stars end as black holes. The explosion revealed most of the star's mass collapsed into a dense core, creating an invisible black hole.
The Sherman Fairchild Foundation has awarded $3.1 million to Caltech to support the SXS program, which simulates black hole collisions and neutron star ruptures with high accuracy using the Spectral Einstein Code (SpEC). The grant will enable the team to perfect SpEC and simulate other warped-spacetime phenomena.
Researchers have discovered a new connection between Carter's constant and Newtonian gravity, shedding light on the behavior of rotating black holes. The findings have significant implications for gravitational-wave astronomy, potentially allowing the detection of small black hole orbits.
Sandra Faber is being honored for her extraordinary advances in understanding the properties of distant galaxies, dark matter, large-scale structure, and black holes. Her innovative leadership has driven significant discoveries in modern cosmology, including the role of dark matter in galaxy formation.
Researchers harness supercomputing to recreate how galaxies form, develop, and collapse. The most detailed recreation of the universe's evolution to date is created using computer simulations that incorporate black hole physics.
The AAS High Energy Astrophysics Division has awarded the 2009 Rossi Prize to Charles D. Bailyn, Jeffrey E. McClintock, and Ronald A. Remillard for their work on measuring black hole masses in binary pairs with companion stars.
A team of Yale University astronomers discovered that galaxies stop forming stars before their central supermassive black holes reach their most powerful stage. The study found no bright AGN at the centers of star-forming galaxies, suggesting that the shutting-down process occurs earlier in the AGN's lifetime.
Astronomers are discovering that galaxies with actively forming stars have a bluish color, while those without do so appear red. The BAT Hard X-ray Survey of NASA's Swift spacecraft has found most nearby active galaxies to be spiral and irregular, with more than 30% being colliding.
A recent study suggests that supermassive black holes formed first and grew before their host galaxies. The ratio of black hole mass to galactic bulge mass is nearly constant across different galaxy sizes and ages. This finding implies that the growth of black holes and galaxies was an interactive process.
Researchers identified two protostars located just a few light-years from the Milky Way's central black hole, defying expectations that gravitational tides would prevent star formation. The discovery suggests molecular gas at the galactic center is denser than previously thought, allowing it to form new stars.
Astronomers use gravitational lensing effect to magnify light from quasar MG J0414+0534, detecting water vapour at redshift 2.64, a time when the Universe was only a fifth of its current age
Researchers found that all active galactic nuclei have a similar physical structure, independent of the black hole's size. The observation constrains current ideas on how glow around black holes is produced, allowing for further study of these enigmatic objects.
Researchers have discovered two distant galaxies with massive black holes at their centers, challenging previous assumptions about the formation of these cosmic objects. The study reveals that these colossal black holes were present even 12 billion years ago, when the universe was just 1.7 billion years old.
Astronomers have found that magnetic fields are essential for black holes to swallow matter. The variations in visible light and X-rays were found to follow a repeated pattern, indicating that strong magnetic fields store energy near the black hole.
Andrea Ghez, a UCLA professor of physics and astronomy, has been selected as a MacArthur Fellow for her pioneering work on supermassive black holes and their role in shaping the evolution of galaxies. Her research has improved our understanding of these enigmatic objects and shed light on their impact on the surrounding environment.
Researchers at Durham University found a giant black hole emitting a regular X-ray signal, linking it to smaller black holes. This discovery sheds light on how gas behaves around super-massive black holes as they feed and develop.
A Yale University astrophysicist has discovered an upper mass limit for black holes, which appear to curb their growth at around 10 billion times the mass of our Sun. This finding has implications for the study of galaxy formation and suggests that black holes may play a key role in regulating star formation.
Researchers used VLBI technique to combine signals from multiple telescopes and detected structure 30 million miles away from the galactic center. The observations provide unprecedented view of the region near the black hole event horizon.
A team of astronomers has obtained the closest views ever of a super-massive black hole at the center of the Milky Way galaxy. The new observations revealed the highest density yet for the concentration of matter at the galaxy's center, supporting the existence of black holes.
The Hubble Space Telescope has resolved individual threads of gas in the filaments of galaxy NGC 1275, revealing a magnetic structure that sustains them for over 100 million years. The discovery provides crucial clues about how giant black holes affect their surroundings.