NASA’s Fermi Gamma-ray Space Telescope and other satellites have recorded a record flare from a…
Browsing: Blazars
Blazars are a very energetic type of active galactic nucleus (AGN), characterized by their intense emissions and rapid variability across the electromagnetic spectrum. These phenomena are powered by supermassive black holes at the centers of massive galaxies, which accrete matter and generate powerful jets of charged particles that travel at nearly the speed of light. What distinguishes blazars from other types of AGNs is that one of these jets is pointed almost directly towards Earth, resulting in a beam of radiation that appears extremely bright due to the relativistic effects of the jet’s high velocity. Blazars are known for their dramatic variability, often changing brightness over timescales ranging from minutes to years. They are also significant sources of gamma rays and are key objects of study in high-energy astrophysics, helping scientists probe the properties of relativistic jets and the environments around black holes.
Astronomers from the Harvard-Smithsonian Center for Astrophysics used Fermi to monitor the gamma-ray variability of…
A team of astronomers has used Fermi data to reveal how blazars are distributed throughout…
An international team of astronomers has for the first time confirmed a link between the…
A new study details how researchers used data from blazars to measure the evolution of…
Using data from the Hubble Space Telescope, researchers noticed that the emission spectrum from blazar…
Using data from NASA’s Fermi Gamma-ray Space Telescope, a team of astronomers have made the…
Scientists have been monitoring radio signals from the galaxy Arp 220, located 250 million light…
NASA’s Fermi Gamma-Ray Telescope has detected enough energetic photons to produce the first all-sky map…