. Scientific Frontline: Cosmology
Showing posts with label Cosmology. Show all posts
Showing posts with label Cosmology. Show all posts

Tuesday, February 3, 2026

Supermassive black holes sit in ‘eye of their own storms,’ studies find

An artist’s rendition of the immediate vicinity around the supermassive black hole known as M87*. However, the roiling, superhot gases around these black holes extend much further than seen in this visualization. Two new studies give us new insight into the regions around these black holes and how they influence their surrounding galaxies.
Illustration Credit: S. Dagnello NRAO/AUI/NSF

Scientific Frontline: "At a Glance" Summary

  • Main Discovery: A powerful, rotating magnetic wind has been identified encircling a supermassive black hole, acting as a feeding mechanism that enables the black hole’s growth rather than pushing material away.
  • Methodology: Researchers utilized the Atacama Large Millimeter/submillimeter Array (ALMA) to detect and analyze specific light wavelengths from hydrogen cyanide (HCN) molecules, using the Doppler effect to trace the motion and structure of gas hidden behind thick dust layers.
  • Key Data: The study focused on the galaxy ESO320-G030, located approximately 120 million light-years from Earth, revealing a wind structure that contradicts previous models of purely repulsive outflows.
  • Significance: This discovery solves a persistent mystery in astrophysics regarding how supermassive black holes accrete mass efficiently, demonstrating that magnetic fields can create a "storm" that funnels matter inward rather than expelling it.
  • Future Application: Astronomers intend to survey other active galaxies to determine if this magnetic wind phase is a universal stage in the lifecycle of all supermassive black holes.
  • Branch of Science: Astrophysics and Cosmology
  • Additional Detail: The observed process parallels the mechanics of star formation ("baby stars"), suggesting that similar physical laws govern growth across vastly different cosmic scales, from small suns to galactic monsters.

Wednesday, January 28, 2026

The infant universe’s “primordial soup” was actually soup

A quark zooms through quark-gluon plasma, creating a wake in the plasma. “Studying how quark wakes bounce back and forth will give us new insights on the quark-gluon plasma’s properties,” Yen-Jie Lee says.
Image Credit: Jose-Luis Olivares, MIT
(CC BY-NC-ND 4.0)

Scientific Frontline: "At a Glance" Summary

  • Main Discovery: Researchers have observed the first direct evidence that the "primordial soup" of the early universe—quark-gluon plasma—behaves as a dense, frictionless liquid rather than a gas, indicated by the formation of wakes behind speeding quarks.
  • Methodology: The team utilized data from the Compact Muon Solenoid (CMS) experiment at CERN's Large Hadron Collider, where heavy lead ions were smashed together at near-light speeds to briefly recreate the primordial plasma; they then analyzed the trajectories of quark-antiquark pairs to detect specific "sloshing" or wake patterns generated as particles moved through the medium.
  • Key Data: The laboratory-created plasma droplets existed for less than a quadrillionth of a second and reached temperatures of several trillion degrees Celsius, mirroring conditions just a few millionths of a second after the Big Bang.
  • Significance: This confirmation resolves a longstanding debate in physics, proving that the infant universe's matter functioned as a cohesive fluid that creates ripples and swirls (similar to a boat in water) rather than a system of randomly scattering individual particles.
  • Future Application: The novel technique of using quark wakes as probes will allow physicists to measure the viscosity and internal properties of quark-gluon plasma with greater precision, effectively providing a detailed "snapshot" of the universe's earliest moments.
  • Branch of Science: High-Energy Particle Physics / Cosmology
  • Additional Detail: The study validates the theoretical "hybrid model" which predicted that high-energy jets (quarks) would induce a hydrodynamic response in the plasma, slowing down the particles and generating a detectable wake.

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