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arxiv 2306.13281 v1 pith:QZRLYIOA submitted 2023-06-23 astro-ph.HE astro-ph.SR

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

classification astro-ph.HE astro-ph.SR
keywords arrivalpulsesvelahyperbolicintensityj0835limitpulsar
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Astronomers have studied the Vela pulsar (PSR~J0835$-$4510) for decades. This study analyses almost one hundred hours of single-pulse data collected over three consecutive days from 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 $-0.85~\pm 0.0109$~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 and giant micro-pulses.

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