Home > Astronomy, Astrophysics, General Astronomy, Stars > Fast Radio Bursts Might Come From Nearby Stars

Fast Radio Bursts Might Come From Nearby Stars


Credit: NASA

Credit: NASA

First discovered in 2007, “fast radio bursts” continue to defy explanation. These cosmic chirps last for only a thousandth of a second. The characteristics of the radio pulses suggested that they came from galaxies billions of light-years away. However, new work points to a much closer origin – flaring stars within our own galaxy.

“We propose that fast radio bursts aren’t as exotic as astronomers first thought,” says lead author Avi Loeb of the Harvard-Smithsonian Center for Astrophysics (CfA).

Fast radio bursts are both brief and bright, packing a lot of energy into a short time. Only six have been discovered to date, all of them in archival data. Each was detected only once, making follow-up studies difficult.

A detailed analysis of the bursts showed that the pulses passed through a large column of electrons on their way to Earth. If those electrons were spread out across intergalactic space, then the pulses must have crossed billions of light-years. As a result, they would have to come from extremely energetic events. Gamma-ray bursts don’t produce the right radio frequencies, so astronomers looked to other extreme events like the collapse of a neutron star into a black hole.

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