Hyperbolic limit on the early arrival time of bright pulses from PSR J0835-4510 (Vela)

Astronomers have studied the Vela pulsar (PSR J0835-4510) for decades. This study analyses almost 100 h of single-pulse data collected over three consecutive days in 2016 and 2020. The work investigates the fascinating phenomena of the earlier arrival of brighter pulses with their increase in peak intensity. We found a hyperbolic relation between them by constructing integrated pulse profiles using flux density intervals and examining the relationship between pulse arrival time and intensity. We identified a phase limit of -0.85 & PLUSMN; 0.0109 ms for the earliest arrival of the brightest pulses. This study offers exciting prospects for further exploring the emission regions responsible for the Vela pulsar's regular pulses and giant micro-pulses.

Automated summary

This study examines the Vela pulsar (PSR J0835-4510), which has been the subject of research for many years. By analyzing nearly 100 hours of single-pulse data collected over three consecutive days in 2016 and 2020, researchers discovered a hyperbolic relation between the earlier arrival of brighter pulses and their peak intensity. By constructing integrated pulse profiles and examining the relationship between pulse arrival time and intensity, a phase limit of -0.85 ± 0.0109 ms was identified for the earliest arrival of the brightest pulses. This study presents exciting prospects for further exploration of the emission regions responsible for the regular pulses and giant micro-pulses of the Vela pulsar.