Tag

Neutron Stars

All articles tagged with #neutron stars

astronomy27 days ago•56 min saved

Neutron Stars May Harbor the Big Bang’s Quark–Gluon Plasma

Scientists propose that the ultra-dense interiors of neutron stars could contain quark-gluon plasma—the same state of matter that existed moments after the Big Bang—and by analyzing how tidal forces in binary neutron-star systems imprint oscillation modes on gravitational waves, researchers hope to infer the stars’ interior structure and their equation of state, though current detectors aren’t yet sensitive enough; next‑generation observatories may confirm the presence of this exotic matter.

via Space|

#astronomy #equation-of-state #gravitational-waves

space1 month ago•3 min saved

Giant Gamma-Ray Burst Found in a Tiny Dwarf Galaxy

Astronomers using NASA's Chandra X-ray Observatory and Hubble traced a short gamma-ray burst (GRB 230906A) to a neutron-star merger inside a tiny dwarf galaxy, revealed by its placement in a long tidal tail; the finding shows such powerful explosions can occur in faint hosts and helps explain how heavy elements are dispersed into galactic outskirts.

via Gizmodo|

#dwarf-galaxies #gamma-ray-bursts #heavy-elements

astronomy1 month ago•54 min saved

Mixed black hole–neutron star mergers reveal eccentric orbits and hidden formation paths

Astronomers analyzing the GW200105 gravitational-wave signal found an eccentric, precession-lacking orbit for a black hole–neutron star binary just before merger, suggesting it was shaped by gravitational interactions with a third body and not by a quiet, isolated inspiral. Using a new model from Birmingham’s Institute of Gravitational Wave Astronomy, the team says there are likely multiple formation channels for such mixed mergers, and the event revised prior mass estimates (BH ~13 solar masses, NS ~2). The finding expands our understanding of how extreme binaries form and evolve and challenges the assumption of circular, isolated mergers.

via Space|

#astronomy #black-holes #gravitational-waves

astronomy1 month ago•56 min saved

Gravitational‑wave catalog GWTC-4 doubles the event tally to 128

The LVK collaboration’s GWTC-4 catalog adds 128 distant gravitational‑wave sources detected from 2023–2024, expanding beyond the previous 90; the data include heavier, faster black‑hole mergers, some lopsided in mass, and two mixed black hole–neutron star mergers, with detections up to 10 billion light‑years away, underscoring general relativity under extreme conditions and expanding our view of black‑hole populations.

via Space|

#astronomy #black-holes #gravitational-waves

science1 month ago•35 min saved

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

science2 months ago•37 min saved

Cosmic Countdown: Universe May Fade Away in 10^78 Years, Study Finds

A new theoretical study argues that not only black holes but other ultradense objects will evaporate via Hawking radiation, shortening the universe’s remaining lifetime to about 10^78 years—far sooner than the previously estimated 10^1100 years. White dwarfs and neutron stars, along with black holes, will gradually fade through gravitational pair production, with white dwarfs and massive black holes persisting around 10^78 years and neutron stars around 10^67 years. Earth would survive roughly 5 billion more years until the Sun consumes it, after which all matter and life would ultimately vanish in the cosmic void.

via Yahoo|

#cosmology #hawking-radiation #neutron-stars

science3 months ago•5 min saved

Astronomers Potentially Detect First-Ever 'Superkilonova' Explosion

Astronomers may have observed the first superkilonova, a hybrid explosion involving both a supernova and a kilonova, suggesting new insights into star death and heavy element formation, though confirmation is pending.

via Indian Defence Review|

#cosmic-transients #gravitational-waves #neutron-stars

science3 months ago•2 min saved

Astronomers Witness Star Splitting in Half, Causing Catastrophe

Astronomers may have observed a new type of astrophysical event called a superkilonova, where a star splits in half, leading to a double explosion involving neutron stars, based on observations of the event AT2025ulz, which showed signs of both supernova and kilonova phenomena.

via Futurism|

#astronomy #gravitational-waves #neutron-stars

science3 months ago•3 min saved

Astronomers Possibly Witness First Double Explosion of a 'Superkilonova'

Scientists observed a unique cosmic event where a massive star first exploded as a supernova, then its core split into two neutron stars that collided, creating a hybrid 'superkilonova' explosion, challenging existing stellar physics and offering new insights into heavy element formation.

via Live Science|

#astronomy #explosion #gravitational-waves

science3 months ago•4 min saved

Astronomers Possibly Observe First Double Superkilonova Explosion

Caltech researchers may have discovered the first superkilonova, a rare event where a star explodes twice in different ways, involving the formation of low-mass neutron stars within a supernova, followed by their merger producing a kilonova, challenging previous understanding of stellar explosions.

via ScienceAlert|

#cosmic-phenomena #gravitational-waves #neutron-stars

science3 months ago•3 min saved

Astronomers Detect First Double-Explosion 'Superkilonova'

Astronomers have observed a rare stellar explosion, dubbed AT2025ulz, which appears to be a 'superkilonova'—a complex event involving both a supernova and a kilonova, resulting from the birth and merger of two neutron stars, challenging existing theories and potentially marking only the second such detection.

via Gizmodo|

#astrophysics #gravitational-waves #kilonova

science3 months ago•8 min saved

Astronomers Possibly Observe First Double 'Superkilonova' Explosion

Astronomers may have detected the first superkilonova, a rare cosmic event involving the merger of two neutron stars, evidenced by a gravitational wave signal and unusual electromagnetic observations, suggesting a complex explosion that could involve sub-solar mass neutron stars. More data is needed to confirm this groundbreaking discovery.

via Space|

#astronomy-discovery #cosmic-explosion #gravitational-waves

science5 months ago•2 min saved

Scientists Edge Closer to Confirming Dark Matter in the Milky Way

Scientists are investigating a mysterious gamma-ray glow near the center of the Milky Way, which could either be caused by neutron stars or potentially be the first evidence of dark matter particles colliding, though conclusive proof remains elusive and further observations are planned.

via Gizmodo|

#astronomy #dark-matter #gamma-rays

science5 months ago•7 min saved

Dark Matter's Role in Shaping Electron-Capture Supernovae and Neutron Star Formation

Researchers have developed a new model showing that dark matter, specifically asymmetric dark matter, can influence the collapse of stars in the 8-10 solar mass range, potentially leading to the formation of unusually low-mass neutron stars and affecting supernova energetics, offering new insights into dark matter's role in stellar processes.

via Phys.org|

#astrophysics #dark-matter #electron-capture-supernovae

science7 months ago•5 min saved

Decade of Gravitational Waves Unveiling Dark Cosmos

Since their first detection in 2015, gravitational waves have revolutionized astrophysics by revealing dark objects like black holes and neutron stars, with recent discoveries including the most massive black hole merger and the clearest gravitational wave detection yet, promising a bright future for understanding the universe's dark side.

via The Conversation|

#black-holes #cosmology #gravitational-waves