What are fast radio bursts? Why are they such a great mystery phenomenon in astronomy?
by Owen Borville
July 14, 2024
Astronomy
NASA's Hubble Space Telescope has detected a unique phenomenon called fast radio bursts.
Fast radio bursts (FRB's) are a fleeting blast of energy or intense, bright bursts of electromagnetic radiation light seen in radio-wave frequencies that can outshine the entire galaxy for a few milliseconds.
Hundreds of FRB's have been detected over the past few years, but astronomers are uncertain of the origin of these phenomena.
A recent FRB in 2022 erupted halfway across the universe, making it the most powerful to date.
In a few milliseconds, an FRB can produce more intensity than our sun does in one year.
Random FRBs can be detected in the universe every minute or two, so these phenomena are very common.
An unexplained flash of radio waves that hit the Earth in 2022 came from a small group of seven distant galaxies outside our own Milky Way galaxy.
Although the origin is uncertain, astronomers believe that the FRB's are interacting with black holes or neutron stars, which would have a magnetic field strong enough to cause a major collision, eruption, or "starquake" caused by colliding stars or astronomical objects with very strong magnetic fields.
FRB's are difficult to detect because they are unpredictable and can last only a fraction of a second to three seconds. The first FRB was detected in 2007.
In addition to black holes and neutron stars, other stages of star formation can be involved in FRB's such as magnetars, which are rapidly rotating neutron stars, white dwarfs, and black holes merging with neutron stars.
These star remnants, neutron stars, white dwarfs, and black holes are believed to collide with each other and this collision is believed to cause fast radio bursts.
Because FRBs are so intense under unique conditions, they are of interest to astronomers because they can reveal secrets of the universe that we cannot observe in other parts of the universe that don't have these conditions.
In additon, because the FRB signals are so bright, they can light up the area around them and allow astronomers to study this area more easily and have a greater chance to learn new things about these phenomena.
FRB signals can also give information about the distance between the signal, and the structure and composition of the universe between the signal.
The energy of the FRB is determined by its brightness and its distance from the Earth.
A small percentage of FRBs repeat, which is another mystery of these phenomena.
NASA, UCSC News
by Owen Borville
July 14, 2024
Astronomy
NASA's Hubble Space Telescope has detected a unique phenomenon called fast radio bursts.
Fast radio bursts (FRB's) are a fleeting blast of energy or intense, bright bursts of electromagnetic radiation light seen in radio-wave frequencies that can outshine the entire galaxy for a few milliseconds.
Hundreds of FRB's have been detected over the past few years, but astronomers are uncertain of the origin of these phenomena.
A recent FRB in 2022 erupted halfway across the universe, making it the most powerful to date.
In a few milliseconds, an FRB can produce more intensity than our sun does in one year.
Random FRBs can be detected in the universe every minute or two, so these phenomena are very common.
An unexplained flash of radio waves that hit the Earth in 2022 came from a small group of seven distant galaxies outside our own Milky Way galaxy.
Although the origin is uncertain, astronomers believe that the FRB's are interacting with black holes or neutron stars, which would have a magnetic field strong enough to cause a major collision, eruption, or "starquake" caused by colliding stars or astronomical objects with very strong magnetic fields.
FRB's are difficult to detect because they are unpredictable and can last only a fraction of a second to three seconds. The first FRB was detected in 2007.
In addition to black holes and neutron stars, other stages of star formation can be involved in FRB's such as magnetars, which are rapidly rotating neutron stars, white dwarfs, and black holes merging with neutron stars.
These star remnants, neutron stars, white dwarfs, and black holes are believed to collide with each other and this collision is believed to cause fast radio bursts.
Because FRBs are so intense under unique conditions, they are of interest to astronomers because they can reveal secrets of the universe that we cannot observe in other parts of the universe that don't have these conditions.
In additon, because the FRB signals are so bright, they can light up the area around them and allow astronomers to study this area more easily and have a greater chance to learn new things about these phenomena.
FRB signals can also give information about the distance between the signal, and the structure and composition of the universe between the signal.
The energy of the FRB is determined by its brightness and its distance from the Earth.
A small percentage of FRBs repeat, which is another mystery of these phenomena.
NASA, UCSC News