Tag

Black Holes

All articles tagged with #black holes

science1 hour ago•11 min saved

Radio Echo Unveils Hidden Gamma-Ray Burst in Distant Galaxy

Astronomers using the Australian SKA Pathfinder (ASKAP) detected the long‑lived radio afterglow of a powerful gamma‑ray burst that emitted little or no high‑energy light, revealing an orphan afterglow (ASKAP J005512-255834). The radio source brightened to about 10^32 watts of energy and faded over about 1,000 days, and lies in a distant, star‑forming galaxy ~1.7 billion light‑years away. This finding provides a clearer example of hidden GRB events and could help map the full gamma‑ray burst population, though an alternative explanation — a star torn apart by an intermediate‑mass black hole — remains possible.

via The Conversation|

#askap #black-holes #gamma-ray-bursts

science11 hours ago•6 min saved

Time as the Bridge: Reimagining Einstein–Rosen Wormholes as Two-Way Temporal Links

New research argues Einstein–Rosen bridges are not spatial shortcuts but two-directional structures in time, acting as complementary halves of a quantum state with forward and backward arrows of time. This framework preserves information across horizons, offering a natural resolution to the black hole information paradox without new physics and suggesting the Big Bang could be a quantum bounce between time-reversed phases. While it does not imply traversable wormholes, the idea points to a deeper quantum gravity picture and potential observational hints such as remnants in the cosmic microwave background or relic black holes.

via SciTechDaily|

#black-holes #cosmology #quantum-gravity

astronomy1 day ago•55 min saved

Cosmic dance through starlight: binary black holes could be spotted before waves wake the universe

Astronomers propose that gravitational lensing by pairs of merging supermassive black holes can magnify background stars into repeating, bright flashes as the black holes orbit, creating a rotating “caustic” pattern. Detecting these periodic light bursts would reveal binary supermassive black holes long before they merge and emit low‑frequency gravitational waves, enabling early multi‑messenger studies with future surveys from the Vera C. Rubin Observatory and the Roman Space Telescope, and later collaboration with LISA.

via Space|

#astronomy #binary-black-holes #black-holes

space3 days ago•71 min saved

Ancient quasar defies growth rules by 13× the cosmic limit

Astronomers studying the distant quasar ID830 find a supermassive black hole actively accreting at about 13 times the Eddington limit, powering gigantic radio jets and a bright X-ray corona. The extreme, short-lived super-Eddington phase challenges standard black hole growth models and supports the idea that early-universe SMBHs grew rapidly, shaping their host galaxies through intense outflows and radiation.

via Live Science|

#black-holes #early-universe #eddington-limit

science3 days ago•20 min saved

Stephen Hawking: The quiet mind that reshaped the cosmos

Stephen Hawking, diagnosed with ALS at 21, defied doctors by living roughly 55 years beyond expectations, making landmark contributions to black holes (Hawking radiation) and cosmology, penning the bestseller A Brief History of Time, and becoming a global icon of science communication despite paralysis.

via Diario AS|

#black-holes #cosmology #hawking-radiation

science4 days ago•39 min saved

Gaia Uncovers a Black-Hole Swarm in Palomar 5, Destined to Dissolve

Gaia data reveal Palomar 5, a Milky Way globular cluster with an extensive tidal stream, may host over 100 stellar-mass black holes, making up about 20% of the cluster’s mass. Detailed simulations that include these black holes show they can eject stars into the cluster’s tidal tails, hastening its dissolution into a stream of black holes that will orbit the galactic center in around a billion years. The finding suggests such black-hole-rich clusters may be common and could be important for understanding black-hole mergers.

via Yahoo|

#black-holes #gaia #globular-clusters

astronomy5 days ago•55 min saved

XRISM reveals the turbulent winds around supermassive black holes

NASA/JAXA’s XRISM X‑ray mission uses high‑resolution spectroscopy to measure gas motions around supermassive black holes, notably M87* and the Perseus cluster, unveiling the strongest turbulence seen near a black hole and the kinetic energy of surrounding gas. This helps explain how black holes heat their environments and influence galactic evolution; findings published late Jan 2026 in Nature and built on XRISM’s 2023 launch in collaboration with ESA.

via Space|

#astronomy #black-holes #galaxy-clusters

astronomy5 days ago•55 min saved

Cosmic predators: active black holes suppress star formation in neighboring galaxies

Astronomers using the James Webb Space Telescope found that one of the universe’s brightest quasars appears to quench star formation not only in its host galaxy but also in neighboring galaxies within about a million light-years. The study of quasar J0100+2802 showed reduced ionized oxygen in nearby galaxies, indicating suppressed star birth likely caused by intense radiation and outflows from the active supermassive black hole, suggesting a galactic “ecosystem” where massive black holes influence galaxy evolution beyond their own hosts, especially in the early universe.

via Space|

#astronomy #black-holes #galaxy-evolution

space5 days ago•5 min saved

Hidden Black-Hole Swarm Shapes Palomar 5's Galactic Stream

Gaia data and N-body simulations indicate Palomar 5 hosts a substantial population of stellar-mass black holes—over 20% of its mass—which drove stars into its broad tidal stream; the cluster is on track to dissolve in about a billion years, leaving a black-hole–dominated remnant, suggesting globular clusters commonly harbor black holes and are key sites for future black hole mergers, with Palomar 5 acting as a Rosetta Stone for stream formation.

via ScienceAlert|

#black-holes #gaia #globular-cluster

technology8 days ago•10 min saved

Beyond Classical Bits: Building a Quantum-Input Complexity Theory

Henry Yuen is building a fully quantum complexity theory to analyze problems whose inputs and outputs are quantum, something traditional theory can’t capture. By recasting issues through the lens of Uhlmann’s theorem, his work shows several quantum-input problems—bit commitments, black-hole decoding, quantum data compression—are actually equivalent, suggesting a unified, quantum-only framework. The project seeks to map these relationships and assess whether quantum-input problems are logically independent from classical complexity, while also sharing Yuen’s personal journey and research philosophy.

via Quanta Magazine|

#black-holes #complexity-theory #cryptography

science10 days ago•2 min saved

Crystal-Clear Gravitational Wave Confirms Einstein’s General Relativity

A record-high-quality gravitational wave signal from a binary black hole merger (GW250114) produced multiple ringdown tones that independently yield the same black-hole mass and spin, providing a precise test of general relativity that passes, while underscoring the ongoing pursuit of quantum gravity and related gaps in our understanding.

via Universe Today|

#black-holes #general-relativity #gravitational-waves

science11 days ago•5 min saved

Record-Breaking Gravitational Wave Reaffirms Einstein’s Relativity

Scientists detected the loudest gravitational wave signal to date, GW250114, from a black-hole merger roughly 1.3 billion light-years away. The exceptionally clear signal lets researchers test Einstein’s general relativity with unprecedented precision, including the ringdown phase and multiple vibration tones, reinforcing GR and propelling future gravitational-wave astronomy with next‑generation detectors like LISA.

via The Daily Galaxy|

#black-holes #general-relativity #gravitational-waves

science11 days ago•20 min saved

Stephen Hawking: The quiet mind behind cosmic breakthroughs

British theoretical physicist Stephen Hawking, who lived with ALS for decades, transformed our understanding of black holes and cosmology, popularized complex physics through books and media, and became a global symbol of intellectual resilience despite severe physical limits.

via Diario AS|

#a-brief-history-of-time #black-holes #cosmology

science11 days ago•98 min saved

Record-Breaking Gravitational Wave Tests Gravity — and Finds Einstein Right Again

Scientists detected GW250114, the loudest gravitational-wave event yet, from a pair of about 30-solar-mass black holes merging around 1.3 billion light-years away, recorded by LIGO with unprecedented clarity thanks to detector upgrades. The signal allowed detailed tests of general relativity, including two primary ringdown tones and a newly identified overtone, all matching GR predictions and Hawking’s area theorem. This strengthens GR’s validity at extreme gravity and points to future tests with next‑generation detectors (Einstein Telescope, Cosmic Explorer) and space-based LISA.

via Live Science|

#black-holes #general-relativity #gravitational-waves

astronomy11 days ago•51 min saved

LOTR-inspired beacons name merging supermassive black holes

Space researchers nicknamed two merging supermassive black holes Gondor and Rohan after Lord of the Rings locations, using a new detection approach that combines gravitational‑wave background data with quasar observations to locate continuous gravitational-wave sources and map galaxy mergers.

via Space|

#astronomy #black-holes #gondor