2023-08-20 17:01:00
20/08/2023 at 20:01 (Doha time) Chinese scientists have discovered a new form of radiation emission from pulsars, called “dwarf pulsars”, through the use of the Chinese telescope “Fast”, which is a spherical radio telescope with a diameter of 500 meters. meter. The discovery was recently published in the journal Nature Astronomy. According to the study, pulsars emit radio signals when they rotate, however, some old pulsars often stop radiating for some periods, a phenomenon called “nullity”. The mechanism responsible for this is still unknown, as it is difficult to probe the magnetosphere during the voiding state due to the lack of measurements of the radioactive emissions. With the high sensitivity of the “Fast” telescope, scientists from the National Astronomical Observatories of the Chinese Academy of Sciences discovered sporadic, weak and accurate pulses in the state of invalidity of the “B2111 + 46” pulsar, and called this new form of pulses the name of dwarf pulses, which are difficult to monitor by telescopes. other radio. Further analysis shows that the magnetic field structure in the dwarf emitting region remains unchanged compared to the magnetic field structure of the normal emitting region. The magnetic structure of a pulsar does not fundamentally change when its radiation is almost extinguished. The study notes that while the radio emission of normal pulses is radiated by a “thunderstorm” of particles in the magnetosphere, the dwarf pulses are produced by one or a few “raindrops” of particles in the magnetosphere. Hahn said these pulses can help reveal the mysteries of pulsars’ radiation processes and the plasma extremes within those stars’ magnetospheres.
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