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Hubble Tension

All articles tagged with #hubble tension

Cosmic Voids: The Universe’s Quiet Labs for Big Questions
science4 days ago

Cosmic Voids: The Universe’s Quiet Labs for Big Questions

Cosmic voids—vast, underdense regions in the cosmic web—are becoming powerful cosmological laboratories for gravity, dark energy, and the Hubble tension. New surveys like DESI and Euclid will map tens of thousands to over 100,000 voids with high fidelity, while advanced simulations fill in their evolution. By tracing how galaxies and other tracers move through voids, scientists test gravity theories, study neutrinos, and sharpen our understanding of dark energy. Some researchers even speculate we may live in a colossal supervoid that could help explain the slightly faster local expansion rate, the Hubble tension. The next decade should decisively test these ideas and deepen our view of the universe.

via WIRED|
#cosmic-voids#cosmology#dark-energy
New Hubble Constant Precision Keeps Cosmology in Tension
science1 month ago

New Hubble Constant Precision Keeps Cosmology in Tension

An international team reports the most precise measurement of the Hubble constant to date (about 73.5 km/s/Mpc with ~1% accuracy). While tighter, the result reinforces the long-standing Hubble tension between local measurements and the standard cosmological model, raising the possibility of undiscovered physics or systematic issues and underscoring the need to reassess our understanding of the universe’s expansion.

via Futurism|
#astrophysics#cosmology#hubble-constant
New Local Distance Network reinforces the Hubble tension, challenging standard cosmology
space1 month ago

New Local Distance Network reinforces the Hubble tension, challenging standard cosmology

Space scientists assembled decades of local-universe distance measurements into the Local Distance Network, delivering the most precise direct measure of the Hubble constant to date (73.50 km/s/Mpc with ~1.1% uncertainty) and confirming the ongoing discrepancy between early- and late-universe expansion rates. By anchoring many distance indicators—from parallax stars and megamasers to Cepheids and thousands of galaxies—the study shows the Hubble tension persists, suggesting the standard cosmological model may be incomplete and could point to new physics, with future observatories potentially resolving the difference.

via Live Science|
#cosmology#distance-ladder#hubble-constant
Unified Measure of Cosmic Expansion Deepens Hubble Mystery
science1 month ago

Unified Measure of Cosmic Expansion Deepens Hubble Mystery

A study in Astronomy & Astrophysics presents the most precise combined value for the Hubble constant, about 73.5 km/s/Mpc (≈45.7 miles/s/Mpc), derived from a new distance-network framework that unifies multiple distance indicators. While it clarifies the measurement, the result reinforces the Hubble tension and suggests that cosmology may require new physics or revisions to current models.

via The Daily Galaxy|
#astronomy-and-astrophysics#cosmology#distance-indicators
Unified Framework Tightens Hubble Constant, Keeps the Tension Alive
space-and-spaceflight1 month ago

Unified Framework Tightens Hubble Constant, Keeps the Tension Alive

Astronomers developed a community-built, open-source distance network that merges local-universe distance measurements to produce a precise Hubble constant of 73.50 ± 0.81 km/s/Mpc. The result confirms, rather than resolves, the existing discrepancy with early-Universe measurements, reinforcing the Hubble tension and hinting at new physics beyond the standard cosmological model. The framework is designed for future testing with next-generation telescopes.

via Gizmodo|
#cosmology#dark-energy#distance-ladder
Cosmic Gravitational-Wave Hum Tightens the Hubble Constant Bounds
science2 months ago

Cosmic Gravitational-Wave Hum Tightens the Hubble Constant Bounds

A new method uses the faint gravitational-wave background from unresolved distant black hole mergers—the stochastic siren—to constrain the Hubble constant. By linking merger rates to the observable universe’s size, a stronger background would indicate slower expansion; non-detections thus tighten limits, and when combined with data from individually observed mergers, the approach yields a more precise H0. With future, more sensitive detectors the gravitational-wave background could be detected and used to further refine cosmological measurements, potentially helping resolve the Hubble tension.

via SciTechDaily|
#cosmology#gravitational-waves#hubble-constant
Cosmic hum offers a new path to pin down the universe’s expansion rate
science2 months ago

Cosmic hum offers a new path to pin down the universe’s expansion rate

Researchers from the University of Illinois and University of Chicago propose the stochastic-siren method, using the gravitational-wave background from countless distant black-hole mergers to infer the Hubble constant. This independent approach can tighten expansion-rate measurements, rule out very slow cosmic expansion with current data, and become more powerful as gravitational-wave detectors improve and the background is detected, potentially helping resolve the Hubble tension.

via ScienceDaily|
#gravitational-wave-background#gravitational-waves#hubble-constant
Cosmologists Pinpoint Hubble Constant to 1% Precision, Deepening the Cosmology Conundrum
science3 months ago

Cosmologists Pinpoint Hubble Constant to 1% Precision, Deepening the Cosmology Conundrum

An international collaboration unified multiple distance-measurement methods into a single statistical framework, achieving a 1% precise measurement of the Hubble constant—the most accurate value to date. While the improved precision narrows uncertainties, it does not resolve the ongoing tension with early-universe predictions, underscoring the need for new physics or modifications to current cosmological models.

via The Daily Galaxy|
#1percent-precision#cosmology#hubble-constant
Scientists Suggest the Universe May Be Gently Spinning, Challenging Physics
science7 months ago

Scientists Suggest the Universe May Be Gently Spinning, Challenging Physics

Scientists propose that the universe might be gently spinning to resolve the Hubble tension, a discrepancy in measurements of cosmic expansion, without violating known physics. This subtle rotation could be detected through patterns in the cosmic microwave background and galaxy distribution, potentially reshaping our understanding of cosmic dynamics.

via Rude Baguette|
#cosmic-microwave-background#cosmology#hubble-tension