Evolution of the long-period pulsar PSR J0901-4046

Gençali, Ali Arda and Ertan, Ünal and Alpar, M. Ali (2023) Evolution of the long-period pulsar PSR J0901-4046. Monthly Notices of the Royal Astronomical Society: Letters, 520 (1). L11-L15. ISSN 1745-3925 (Print) 1745-3933 (Online)

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The fallback disc model predicted that anomalous X-ray pulsars (AXPs) and soft gamma repeaters (SGRs) will evolve to isolated long-period pulsars (LPPs) before the discovery of the first two LPPs this year. Unlike normal radio pulsars, LPPs show transient pulsed-radio epochs with unusual and variable pulse shapes, similar to the radio behaviour of the few radio emitting AXP/SGRs. We show that the present properties of the recently discovered second LPP, PSR J0901-4046 (P ≲ 76 s), are obtained as a result of evolution in interaction with a fallback disc, as we had already shown for the first discovered LPP, GLEAM-X J162759.5-523504.3 (P ≲ 1091 s). While there is only an upper limit to the period derivative, ˙P;, of GLEAM-X J162759.5-523504.3, the ˙P of the PSR J0901-4046 has already been measured, providing better constraints for the evolutionary models. The model can produce the source properties with a dipole moment μ ≲ 1030 G cm3. The results are not sensitive to the initial pulsar period. Our results indicate that PSR J0901-4046 went through an AXP/SGR epoch at an age of a few 104 yr, and is ∼(6-8) × 105 yr old at present.
Item Type: Article
Uncontrolled Keywords: accretion, accretion discs; pulsars: individual: PSR J0901-4046; stars: neutron
Divisions: Faculty of Engineering and Natural Sciences
Depositing User: Ünal Ertan
Date Deposited: 06 Aug 2023 20:11
Last Modified: 05 Oct 2023 15:57
URI: https://research.sabanciuniv.edu/id/eprint/47336

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