(ORDO NEWS) — Using a 500-meter aperture spherical radio telescope (FAST), Chinese astronomers studied the behavior of the rotating single-pulse radio transient (RRAT) PSR J0628+0909.
PSR J0628+0909 has a pulse period of approximately 1.24 seconds and a dispersion index of 88 pc/cm3.
According to previous studies, the frequency of flashes of this pulsar is about 141 per hour, and the duration of the pulse is a maximum of 10 milliseconds.
A team of astronomers led by Juy-An Hsu of Peking University has been studying single pulses of PSR J0628+0909, hoping to shed more light on the nature of this source.
They used a 19-beam FAST L-band receiver that covers the frequency range from 1.0 to 1.5 GHz.
When analyzing the distribution of the peak stream of single pulses, scientists found that three log-normal components are required to describe the distribution.
The detected components are at least several times weaker compared to previous results.
This indicates that the intrinsic peak momentum flux or energy distribution is more complex when observed with higher sensitivity.
In addition, astronomers have identified weaker pulse signals hidden behind radiometer noise.
Similar weak pulses have been detected in other RRATs, therefore, this discovery supports the hypothesis that RRATs in general are low-output pulsars.
The study also showed that the correlation between latency and pulse energy is relatively weak.
It was added that the event rate for PSR J0628+0909 single pulses with a signal to noise ratio (S/N) greater than 7.0 was calculated as approximately 270 per hour.
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