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Ligo Virgo Kagra

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Gravitational Wave Astronomy Matures Into a Fully-Fledged Science
science-and-tech1 month ago

Gravitational Wave Astronomy Matures Into a Fully-Fledged Science

Gravitational wave astronomy has matured from a rare detection to a fully developed science: by mid-2026 there are 390 confirmed events across four detectors (LIGO, Virgo, KAGRA), boosted by upgrades and the addition of LIGO India (beginning around 2030) with space-based prospects like LISA on the horizon. The growing catalog enables population studies of stellar-mass black holes and neutron stars, improved sky localization, and stringent tests of general relativity, signaling a collaborative, high-impact future for gravitational wave science.

via Big Think|
#astronomy#black-holes#gravitational-waves
Cosmic Gold Mine: New Catalog Unveils a Lost World of Black Hole Mergers
science1 month ago

Cosmic Gold Mine: New Catalog Unveils a Lost World of Black Hole Mergers

Astronomers released GWTC-5, a catalog with 161 new gravitational-wave signals from black-hole mergers detected by LIGO, Virgo, and KAGRA between April 2024 and January 2025, bringing total detections to 390. The haul includes second-generation mergers and the most precisely localized event to date, enabling improved measurements of the Hubble constant and tests of general relativity and Hawking’s area theorem, underscoring a growing, detailed view of black hole populations and their growth in the universe.

via Space|
#black-holes#cosmology#gravitational-waves
Gravitational-Wave Census Maps Diverse Black Hole Origins
space1 month ago

Gravitational-Wave Census Maps Diverse Black Hole Origins

A new gravitational-wave catalog from LIGO-Virgo-KAGRA, with nearly 400 detections, lets scientists census black holes and shows they form through multiple channels—from direct stellar collapse to cluster dynamics and hierarchical mergers—while mass clusters near 10 and 35 solar masses and many objects spin rapidly, signaling a diverse, evolving black-hole population.

via ScienceAlert|
#binary-mergers#black-holes#gravitational-waves
Possible Dark Matter Clue Hidden in 2019 Gravitational Wave Signal
science1 month ago

Possible Dark Matter Clue Hidden in 2019 Gravitational Wave Signal

Physicists modeling ultralight dark matter around merging black holes suggest the July 2019 LVK event GW190728 could reflect a dense dark matter cloud, imprinting signatures on the gravitational waves. While intriguing, the statistical significance is not yet strong enough to claim a detection, and independent checks are needed; if confirmed, it would open a new way to study dark matter and its interaction with spacetime.

via ScienceAlert|
#astrophysics#black-holes#dark-matter
Massive black holes may form in crowded star clusters through successive mergers
space2 months ago

Massive black holes may form in crowded star clusters through successive mergers

A new study of 153 black hole mergers from GWTC4 finds two distinct populations: lighter black holes born from massive-star collapses and heavier ones likely created by hierarchical mergers in dense star clusters, supporting a predicted mass gap around 45 solar masses and suggesting the largest black holes grow primarily via cluster mergers rather than direct stellar collapse.

via Space|
#black-holes#globular-clusters#gravitational-waves
science3 months ago

Three Pathways for Merging Black Holes Revealed by GWTC-4

A new GWTC-4 catalog from the LIGO-Virgo-KAGRA collaboration doubles the count of gravitational-wave detections and shows merging binary black holes split into three subpopulations with distinct masses, spins, and merger rates. The study suggests multiple origins for these mergers—from isolated binary evolution to hierarchical, recycled mergers—producing unusually heavy and fast-spinning systems and reshaping our understanding of black hole formation and their cosmic origins.

via Ground News|
#black-holes#formation-channels#gravitational-waves
Black Hole Merger Detected With Gamma-Ray Burst, Redefining Multi-Messenger Astronomy
science4 months ago

Black Hole Merger Detected With Gamma-Ray Burst, Redefining Multi-Messenger Astronomy

An international team reports a rare link between a binary black hole merger (GW event S241125n, about 4.2 billion light-years away) and a short gamma-ray burst with an X-ray afterglow, suggesting such mergers can emit detectable light under certain conditions and signaling a new era for combining gravitational waves with electromagnetic observations.

via The Daily Galaxy|
#black-hole-merger#gamma-ray-burst#gravitational-waves
128 New Gravitational-Wave Signals Redefine Black Hole Demographics
science4 months ago

128 New Gravitational-Wave Signals Redefine Black Hole Demographics

The LVK collaboration released Gravitational-Wave Transient Catalog 4.0 (GWTC-4), adding 128 new gravitational-wave candidates detected from 2015–2024, more than doubling the catalog. The expanded set reveals a wider variety of black-hole binaries, including very massive and rapidly spinning systems, enabling tests of general relativity and new measurements of the universe’s expansion (via the Hubble constant). This growth pushes gravitational-wave astronomy into new regions of parameter space and promises deeper insights into black-hole formation and cosmic evolution.

via The Daily Galaxy|
#astrophysics#black-holes#gravitational-waves
New Gravitational-Wave Catalog Expands the Testing Ground for Einstein’s Gravity
science4 months ago

New Gravitational-Wave Catalog Expands the Testing Ground for Einstein’s Gravity

A newly released, expanded catalog of gravitational-wave detections from LIGO, Virgo, and KAGRA more than doubles the known events, revealing a broader population of black holes and neutron-star mergers and enabling stringent tests of Einstein’s general relativity as gravity’s effects on spacetime are probed through mass, spin, and merger dynamics. The dataset deepens our understanding of spacetime warping and paves the way for real-time data releases from the collaboration.

via Yahoo|
#black-holes#general-relativity#gravitational-waves
Record-Breaking Black Hole Merger Challenges Current Theories
science1 year ago

Record-Breaking Black Hole Merger Challenges Current Theories

Scientists observed the largest black hole collision ever, involving two black holes of 100 and 140 solar masses merging into a 225-solar-mass object, challenging current black hole formation theories and suggesting possible previous mergers of smaller black holes. The event produced an exceptionally powerful gravitational wave signal, prompting further study into black hole evolution.

via theregister.com|
#astrophysics#black-hole-collision#black-hole-formation
"Unveiling Deep Space Mystery: Collision Sends Gravitational-wave Signal"
astronomy2 years ago

"Unveiling Deep Space Mystery: Collision Sends Gravitational-wave Signal"

The LIGO-Virgo-KAGRA Collaboration detected a unique gravitational wave signal, likely resulting from the collision of a neutron star and an unknown object, possibly a low-mass black hole, filling the mass gap between neutron stars and black holes. This discovery suggests a higher rate of similar collisions than previously thought and hints at more exciting findings in gravitational wave science, with plans for a space-based observatory to further explore the gravitational universe.

via Gizmodo|
#astronomy#black-hole#gravitational-waves