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Blazar

All articles tagged with #blazar

Invisible dark-matter lens briefly boosts a blazar’s jet, hinting at neutrino sources
science6 days ago

Invisible dark-matter lens briefly boosts a blazar’s jet, hinting at neutrino sources

Astronomers report that the jet from a distant blazar (PKS 2233-148) is being gravitationally lensed by an unseen dark-matter clump, temporarily magnifying the jet and potentially aiding the search for high-energy neutrino sources; the finding, supported by VLBA, Fermi, and Swift observations and published in Monthly Notices of the Royal Astronomical Society, offers a first hint that dark-matter substructure can produce lensing effects in relativistic cosmic jets.

via Space|
#blazar#dark-matter#gravitational-lensing
Earth-Directed Blazar Jets May Explain Record Ultra-High-Energy Neutrino
space2 months ago

Earth-Directed Blazar Jets May Explain Record Ultra-High-Energy Neutrino

A 220 PeV neutrino detected by KM3NeT in 2023 is examined for origins; a population of blazars—jets from active galactic nuclei aimed at Earth—could account for such events without exceeding the extragalactic gamma-ray background measured by Fermi, though no electromagnetic counterpart was found and IceCube’s non-detection constrains the scenario. The study shows the blazar-population model is plausible within a defined parameter range and highlights the need for future KM3NeT upgrades and more data to confirm or refute this diffuse-origin explanation.

via Space Daily|
#blazar#gamma-ray-background#icecube
Cosmic duet: twin supermassive black holes near collision could send Earth-detectable waves within a century
space4 months ago

Cosmic duet: twin supermassive black holes near collision could send Earth-detectable waves within a century

Decades of radio observations reveal that the blazar Markarian 501 hosts two supermassive black holes in a tight binary, each hundreds of millions to billions of solar masses, orbiting about every 121 days at a separation of roughly 250–540 AU. The pair is expected to merge within less than 100 years, producing powerful gravitational waves that could be detected on Earth and offering new insights into extreme black-hole mergers.

via Live Science|
#astronomy#black-holes#blazar
Scientists Discover 'Eye of Sauron' in Space Emitting Ghost Particles
science1 year ago

Scientists Discover 'Eye of Sauron' in Space Emitting Ghost Particles

Astronomers have observed a bright galactic nucleus called PKS 1424+240, dubbed the 'Eye of Sauron,' a blazar with jets pointed directly at Earth, causing an optical illusion that makes the jets appear slower and brighter. Located 7.4 billion light-years away, it emits gamma rays and neutrinos, providing insights into supermassive black holes and cosmic jet behavior.

via Yahoo News Canada|
#astronomy#blackhole#blazar
Astronomers Discover 'Eye of Sauron' Blazar Emitting Ghost Particles
science1 year ago

Astronomers Discover 'Eye of Sauron' Blazar Emitting Ghost Particles

Astronomers have captured a detailed image of a blazar called PKS 1424+240, resembling the 'Eye of Sauron,' revealing a toroidal magnetic field and high-energy jets pointing toward Earth. This object is a powerful source of gamma rays and neutrinos, providing insights into how supermassive black holes accelerate particles and produce ghost particles that pass through everything, including our bodies.

via Space|
#black-holes#blazar#cosmic-jets
"Unleashing the Power: Supermassive Black Hole's 570-Light-Year Plasma Jet"
astronomy2 years ago

"Unleashing the Power: Supermassive Black Hole's 570-Light-Year Plasma Jet"

Astronomers have used a network of radio telescopes, including the RadioAstron space telescope, to observe a distant supermassive black hole releasing a twisted jet of plasma at near-light speed. The observations reveal unprecedented details of the black hole and plasma jet, showing that the jet is composed of twisted filaments stretching nearly 570 light-years. The twists and turns in the jet suggest the presence of a helical magnetic field that guides the plasma. These findings challenge prior theories and provide insights into the intricate processes near the black hole.

via WION|
#astronomy#astrophysics#blazar
Cosmic Spider: Black Hole Spins Plasma Ropes
science-and-astronomy2 years ago

Cosmic Spider: Black Hole Spins Plasma Ropes

Astronomers have observed a distant supermassive black hole, located at the heart of a blazar named 3C 279, spinning a jet of plasma into a twisted rope and ejecting it at near-light speed. This observation, made using a network of radio telescopes including the RadioAstron space telescope, provides the most detailed look yet at the internal structure of an astrophysical jet emerging from a supermassive black hole. The findings challenge current theories on the creation and evolution of these jets, suggesting the need for revised models and a deeper understanding of the role of magnetic fields in their formation.

via Space.com|
#astrophysics#blazar#plasma-jet
"Earth in the Path of a Supermassive Black Hole's High-Energy Jet"
science-and-astronomy3 years ago

"Earth in the Path of a Supermassive Black Hole's High-Energy Jet"

NASA's Imaging X-ray Polarimetry Explorer (IXPE) mission has observed a supermassive black hole, known as Markarian 421, pointing its highly energetic jet directly towards Earth. The jet, created by the black hole's accretion disk, emits bright electromagnetic radiation and is accompanied by a helical magnetic field. The polarization of the jet was found to rotate nearly 180 degrees in just two days, providing new insights into the physics of blazar jets. The discovery could help scientists better understand the mechanisms behind these extreme cosmic phenomena.

via Space.com|
#black-hole#blazar#ixpe
"NASA's IXPE Mission Unveils Astonishing Mega Jet Emanating from Black Hole"
astronomy3 years ago

"NASA's IXPE Mission Unveils Astonishing Mega Jet Emanating from Black Hole"

NASA's Imaging X-ray Polarimetry Explorer (IXPE) has made surprising discoveries about the blazar Markarian 421, located 400 million light-years away. IXPE's unique X-ray polarimetry measurements have revealed evidence of a helical structure in the magnetic field where particles are accelerated. The polarization angle of the X-ray emissions from Markarian 421 was found to rotate, indicating the presence of a shockwave propagating along the spiraling magnetic fields inside the blazar's jet. These findings provide valuable insights into the dynamics and emissions of blazar jets and highlight the importance of X-ray polarimetry in studying these cosmic phenomena.

via SciTechDaily|
#astronomy#blazar#ixpe
Radio Galaxy Transforms into Blazar, Astronomers Discover
astronomy3 years ago

Radio Galaxy Transforms into Blazar, Astronomers Discover

Astronomers have observed a rare case of a galaxy shapeshifting, as a giant radio galaxy named PBC J2333.9-2343 has now been classified as a blazar. The galaxy's core has switched back on, and is now aiming its jet directly towards us. The blazar PBC J2333.9-2343 could give us a deeper understanding of how galaxies can transform, even on human timescales. The research team conducted an extremely thorough investigation, collecting observations in radio, infrared, optical, ultraviolet, X-ray, and gamma-ray wavelengths.

via ScienceAlert|
#astronomy#black-hole#blazar