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

Author:

Mahida Angiraben D1ORCID,Palfreyman J L2ORCID,Molera Calvés G2,Sett Susmita34

Affiliation:

1. OzGrav-UWA, Department of Physics, The University of Western Australia , Crawley, WA 6009, Australia

2. School of Natural Sciences, University of Tasmania , Private Bag 37, Hobart, TAS 7001, Australia

3. International Centre for Radio Astronomy Research, Curtin University , Bentley, WA 6102, Australia

4. CSIRO Astronomy and Space Science , PO Box 76, Epping, NSW 1710, Australia

Abstract

ABSTRACT 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 ± 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.

Funder

University of Tasmania

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

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