User Tools

Site Tools

Please register and/or login to edit and create pages


start:physics:cosmology:fast_radio_bursts

Wikenigma - an Encyclopedia of Unknowns Wikenigma - an Encyclopedia of the Unknown Wikenigma - an Encyclopaedia of Unknowns Wikenigma - an Encyclopaedia of the Unknown

Fast radio bursts

“Lasting only a fraction of a second yet packing a phenomenal amount of energy, FRBs are brief radio flashes of unknown origin that appear to come from random directions on the sky. Though only a handful have been documented previously, astronomers believe that the observable Universe is rocked by thousands of these events each day.”

source: National Radio Astronomy Observatory, US

The bursts typically last only a few milliseconds, are wideband (from MHz to GHz), sometimes polarised, and are thought to originate predominantly outside our galaxy. Hypotheses for their source include:

• Collapsing black holes or neutron stars
• Blitzars (a spinning pulsar rapidly collapses into a black hole)
• Hyperflares of magnetars (a neutron star with an extremely powerful magnetic field)

However :

“None of the models put forward seem perfectly adequate. Not one really explains all the observations.”

source; PNAS 2017

More info Max Planck Institute for Radio Astronomy


Note: A new (2017) study from Harvard puts forward the imaginative idea that FRBs may be signs of Alien Civilisation's use of photon-drives to propel their spacecraft . . . though the authors end with the statement that the purpose of their paper includes “at the very least, the important purpose of enabling astronomers to rule it out” . . .
See : Fast Radio Bursts from Extragalactic Light Sails


Update August 2017 :

Project Breakthrough Listen (UC Berkeley)

“ […] has detected 15 fast radio bursts emanating from the mysterious 'repeater' FRB 121102.”

Source

    Share this page


DOKUWIKI IMPLEMENTATION DESIGN BY UNIV.ORG.UK