Tag

General Relativity

All articles tagged with #general relativity

astronomy5 days ago•55 min saved

Milky Way’s Core May Hide an Ultra-Magnetized Pulsar

Scientists suspect a rapidly spinning, highly magnetic neutron star (a pulsar) sits near the Milky Way’s center. A Breakthrough Listen radio survey with the Green Bank Telescope (2021–2023) found a single pulsar candidate, BLPSR, around 122 rotations per second. If confirmed, such a pulsar orbiting Sagittarius A* could serve as a precise cosmic clock to test general relativity in the extreme gravity near the galaxy’s supermassive black hole, though the Galactic Center is notoriously hard to survey. Future facilities like ngVLA and SKA could help determine how many pulsars truly populate the core.

via Space|

#astronomy #galactic-center #general-relativity

astronomy10 days ago•50 min saved

Einstein’s relativity could veil a hidden population of binary-star exoplanets

Astronomers argue there may be hundreds to thousands of Tatooine‑like exoplanets in the Milky Way, but the observed scarcity of circumbinary worlds stems from a GR‑driven resonance in tight binary systems that destabilizes planetary orbits, combined with biases in Kepler/TESS detections that make these planets hard to find.

via Space|

#astronomy #binary-stars #circumbinary

science12 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

science12 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

science13 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

research-and-discovery17 days ago•5 min saved

Potential Pulsar Near Galactic Center Could Probe General Relativity

Columbia University and Breakthrough Listen identify an 8.19-millisecond pulsar candidate near the Milky Way’s Sagittarius A*, with follow-up observations underway; confirming it could enable precision tests of General Relativity around the galaxy’s central supermassive black hole.

via Columbia University|

#breakthrough-listen #general-relativity #milky-way-center

space-and-spaceflight23 days ago•17 min saved

Einsteinian Gravity Explains Why Circumbinary Planets Are So Rare

A new study shows general relativity alters the three-body dynamics around tight binary stars, progressively destabilizing circumbinary planets and helping explain their scarcity and the difficulty of detecting them.

via Gizmodo|

#circumbinary-planets #exoplanets #general-relativity

science1 month ago•5 min saved

Geometry, not dark energy: a new gravity theory explains cosmic acceleration

Researchers propose an extended gravity theory called Finsler gravity that broadens spacetime geometry; when applied to the Friedmann equations, it naturally yields cosmic acceleration without a dark energy term, suggesting geometry could drive the universe’s speeding expansion.

via ScienceDaily|

#cosmology #dark-energy #finsler-gravity

science1 month ago•2 min saved

Reevaluating Cosmic Expansion: New Theories Challenge Dark Energy's Role

A new study suggests that the accelerated expansion of the universe might be explained by an extension of general relativity called Finsler gravity, potentially eliminating the need for dark energy as the cause.

via SciTechDaily|

#cosmic-expansion #dark-energy #finsler-gravity

science2 months ago•4 min saved

Revealing the Secrets of the Most Powerful Black Holes

Scientists have used the world's most powerful supercomputers to simulate the most powerful black hole ever modeled, revealing new insights into black hole behavior, including super-Eddington accretion, magnetic field effects, and radiation dynamics, challenging previous assumptions and aligning closely with observational data.

via Indian Defence Review|

#accretion-flows #black-holes #general-relativity

science2 months ago•4 min saved

Wobbling Star Unveils Spacetime Twisting Near Black Hole

Astronomers observed a star being torn apart by a supermassive black hole in galaxy LEDA 145386, providing the most detailed evidence yet of frame-dragging, a prediction of general relativity, as the black hole's rotation twists spacetime around it.

via ScienceAlert|

#black-hole #frame-dragging #general-relativity

science2 months ago•19 min saved

Revolutionary Theory Challenges 60-Year Black Hole Paradigm

A new theory questions the traditional view of black holes, suggesting they may never fully form but only approach their event horizons asymptotically, which resolves longstanding paradoxes and emphasizes the importance of causal structure in observations.

via SciTechDaily|

#black-holes #event-horizon #general-relativity

science3 months ago•6 min saved

New Study Clarifies Classical Gravity's Role in Quantum Entanglement

Recent research by Aziz and Howl suggests that matter can become quantum entangled through gravitational fields even if gravity is not quantum, challenging traditional views on quantum gravity and proposing new ways to test its existence in future experiments.

via Space|

#entanglement #feynman-thought-experiment #general-relativity

science4 months ago•2 min saved

Searching for Reality Risks Falling into a Black Hole

Physicist Daniel Carney discusses how attempting to measure an object's position too precisely can cause it to collapse into a black hole, highlighting fundamental limits in measurement imposed by the interplay of quantum mechanics and gravity, which may suggest that ultimate reality is forever beyond observation.

via IAI TV|

#black-holes #general-relativity #measurement-limits

science4 months ago•2 min saved

Can Classical Gravity Theories Explain Quantum Entanglement?

Physicists are debating whether gravity can produce quantum entanglement, with recent proposals suggesting that gravity might have quantum effects without being a quantum theory itself, challenging traditional views and opening new avenues for understanding the fundamental nature of gravity and quantum mechanics.

via Nature|

#entanglement #general-relativity #gravity