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Black Hole

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Ancient quasar reveals rapid black hole growth in the universe’s infancy
space2 days ago

Ancient quasar reveals rapid black hole growth in the universe’s infancy

Astronomers using ESA’s Euclid telescope identified 31 quasars dating to about 670 million years after the Big Bang, including the oldest quasar yet observed that shines with the light of roughly a trillion suns, helping explain how supermassive black holes grew so quickly and shedding light on the epoch of reionization; the findings, published in Astronomy & Astrophysics, come from Euclid’s Wide Survey which will map a large portion of the sky.

via Space|
#accretion-disk#black-hole#early-universe
Dormant supermassive black hole reawakens, unleashing a fresh jet across a million light-years
space9 days ago

Dormant supermassive black hole reawakens, unleashing a fresh jet across a million light-years

Astronomers observed galaxy J1007+3540 in the WHL 100706.4+354041 cluster, where a supermassive black hole that had been dormant for about 100 million years has restarted activity, producing a new, bright jet alongside older, faded radio lobes from a prior active phase. Using LOFAR and the upgraded GMRT, the team found the outer, low-frequency lobes are ~240 million years old while a younger inner jet is ~140 million years old, indicating episodic AGN activity. The jets are being distorted by the hot intracluster medium, illustrating how environment shapes jet evolution and confirming that some supermassive black holes cycle between active and dormant states on hundreds of millions of years timescales.

via Space Daily|
#agn#black-hole#galaxy-cluster
Loudest Black-Hole Merger Sheds Light on Event Horizons
science14 days ago

Loudest Black-Hole Merger Sheds Light on Event Horizons

Scientists analyzed GW250114—the loudest binary black-hole gravitational-wave signal observed to date, from a merger of two ~32-solar-mass black holes detected by LIGO, Virgo, and KAGRA. They identified a direct-waves component near the horizon and used it to measure the remnant black hole’s rotation and surface gravity, offering a new way to study event horizons and test general relativity in the extreme gravity regime.

via Yahoo|
#black-hole#event-horizon#general-relativity
Direct-wave signal edges closer to unveiling a black hole’s event horizon
science17 days ago

Direct-wave signal edges closer to unveiling a black hole’s event horizon

A new, unusually clear gravitational-wave signal from a black-hole merger (GW250114) may carry the long-theorized direct-wave signature, offering a rare observational probe of the region near a black hole’s event horizon and enabling measurements of horizon rotation; if confirmed, this could open a new way to test general relativity and study near-horizon physics, though additional data and verification are needed.

via ScienceAlert|
#black-hole#direct-wave#event-horizon
Could Dark Matter Be the Real Heart of the Milky Way?
space19 days ago

Could Dark Matter Be the Real Heart of the Milky Way?

Astronomers are rethinking the Milky Way’s centre: the long-held view that a supermassive black hole (Sagittarius A*) sits at the heart may be challenged by a fermionic dark matter core that could explain the observed stellar motions and even mimic the black hole’s shadow. Distinguishing the scenarios hinges on precise orbital precession measurements, which future upgrades like GRAVITY+ and the Extremely Large Telescope (and next-gen EHT observations) could enable. If verified, the idea would reshape galactic dynamics and dark matter physics, forcing a rethink of how galaxies host and regulate their centres.

via BBC Sky at Night Magazine|
#black-hole#dark-matter#gaia
Ancient Flickering Quasar Reveals Early Growth of Supermassive Black Holes
space29 days ago

Ancient Flickering Quasar Reveals Early Growth of Supermassive Black Holes

Astronomers report the discovery of J0439+1634, the oldest known flickering quasar, whose light has traveled more than 13 billion years to Earth, dating to the cosmic dawn when the Universe was about 850 million years old. The quasar appears to host a pancake-shaped, surprisingly mature accretion disk feeding a supermassive black hole over 600 million solar masses, making it extremely bright. Multi-wavelength data, including NEOWISE infrared observations, show irregular flickering driven by variable gas inflow, providing direct clues about early black hole growth and enabling new mass-measurement approaches. The study suggests growth processes seen in nearby quasars were already in place early on, and future facilities like the Vera C. Rubin Observatory and the Nancy Grace Roman Space Telescope will hunt for even earlier examples.

via ScienceAlert|
#accretion-disk#black-hole#cosmic-dawn
JWST weighs a distant 6-billion-solar-mass black hole in a 10-billion-light-year galaxy
space1 month ago

JWST weighs a distant 6-billion-solar-mass black hole in a 10-billion-light-year galaxy

Using the James Webb Space Telescope and gravitational lensing, astronomers tracked the motion of stars at the heart of the galaxy MRG-M0138 (about 10 billion light-years away) to weigh a dormant supermassive black hole of roughly 6 billion solar masses—the most distant black hole weighed by this method. The host galaxy is no longer forming stars, suggesting a past quasar phase that expelled gas and quenched star formation. The study, published in Science, helps chart how black holes and their galaxies grow and influence each other over cosmic time.

via Space|
#black-hole#gravitational-lensing#james-webb-space-telescope
Milky Way’s central black hole reveals a cosmic wind reshaping its surroundings
science1 month ago

Milky Way’s central black hole reveals a cosmic wind reshaping its surroundings

Astronomers using ALMA and Chandra observations have captured the first clear evidence of a wind blowing from the Milky Way’s central supermassive black hole, Sagittarius A*, carving a cone-shaped cavity in surrounding cold gas and indicating the black hole has been actively shaping its environment for at least 20,000 years while remaining relatively quiet compared with active galaxies.

via BBC Sky at Night Magazine|
#alma#black-hole#galactic-center
Seven-Dimensional Geometry Suggests Black Holes Leave Quantum Memory
science1 month ago

Seven-Dimensional Geometry Suggests Black Holes Leave Quantum Memory

A seven-dimensional Einstein-Cartan theory on a G2-manifold with torsion implies that Planck-scale torsion produces a repulsive effect that halts Hawking evaporation, leaving stable black-hole remnants whose internal torsion vibrations store quantum information. This could resolve the black hole information paradox, while naturally linking the electroweak scale and Higgs field to the geometry and offering potential dark matter candidates and testable ultra-high-energy predictions.

via SciTechDaily|
#black-hole#extra-dimensions#g2-manifold
James Webb spots the Squid Galaxy’s glowing core
space1 month ago

James Webb spots the Squid Galaxy’s glowing core

NASA’s James Webb Space Telescope captured a breathtaking image of Messier 77 (the Squid Galaxy), highlighting a bright core and radiating light beams. The glow is powered by gas heated by a central black hole; some rays are optical artifacts of the telescope. M77 sits about 47 million light-years away in Cetus and has a magnitude around 9.6, making it visible with modest telescopes.

via Space|
#black-hole#galaxies#james-webb-space-telescope
Cygnus X-1 Jets Hit Real-Time Power of 10,000 Suns
space1 month ago

Cygnus X-1 Jets Hit Real-Time Power of 10,000 Suns

Astronomers directly measured the instantaneous power of jets from the Cygnus X-1 black hole binary—nearly 10,000 suns—while jets travel at about 0.5c and bend under the donor star’s wind, based on 18 years of high-resolution radio observations; the real-time jet-power measurement improves understanding of black-hole feedback and its influence on galaxy-scale environments.

via The Daily Galaxy|
#black-hole#cygnus-x-1#jets
Webb Telescope Reveals Distant Galaxy's Luminous Core Fueled by a Feeding Black Hole
science2 months ago

Webb Telescope Reveals Distant Galaxy's Luminous Core Fueled by a Feeding Black Hole

NASA's James Webb Space Telescope has released a sharp infrared image of Messier 77, a spiral galaxy 45 million light-years away, exposing its ultra-bright core powered by an actively feeding supermassive black hole (~8 million solar masses). Infrared light penetrates dust, letting Webb reveal how gas and dust are drawn in and heated to extreme temperatures as they spiral toward the event horizon, demonstrating Webb's transformative ability to study active galactic nuclei.

via The Daily Galaxy|
#astronomy#black-hole#james-webb-space-telescope
Blue cosmic flares traced to black-hole and Wolf-Rayet star mergers
space2 months ago

Blue cosmic flares traced to black-hole and Wolf-Rayet star mergers

Astronomers propose that the rare, fast-evolving blue explosions called Luminous Fast Blue Optical Transients (LFBOTs) arise when a compact stellar remnant—such as a black hole or neutron star—merges with the helium core of a Wolf-Rayet star. The Wolf-Rayet merger model neatly explains LFBOTs’ blue hue, dense circumstellar environments, and offsets from birth sites better than tidal disruption or standard supernova scenarios. With the Rubin Observatory’s LSST expected to uncover more LFBOTs at greater distances, scientists hope to test this channel and learn how these progenitors evolve over cosmic time.

via Space|
#astronomy#binary-merger#black-hole