Electrically charged pulsars

Alloy, Marcelo D.; Menezes, D. P.

doi:10.1590/s0103-97332007000800001

Cited by 2 publications

(1 citation statement)

References 27 publications

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“…Thus, the quest for an equation of state that accommodates these high values for the maximum mass must take into account the effect of the charge on masses which is to increase the mass in comparison to the same equation of state without charge. In principle, (realistic) equations of state ruled out by recent observations can come into play again because of the effect of the charge.Thus, from our FRB model, it seems to be challenging to obtain some constraints on the equation of state of neutron stars, although we see a lack of investigations concerning the use of realistic nuclear matter equations of state in charged neutron stars in the literature (Alloy & Menezes 2007;Rotondo et al 2011).…”

Section: Discussionmentioning

confidence: 99%

Sudden discharge of young charged magnetars as a new model for FRBs

de Avellar,

Beaklini,

Nunes

et al. 2021

Preprint

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We propose a new model for Fast Radio Bursts (FRBs) based on a sudden discharge of a charged young magnetar, caused by the short falling timescale of oppositely charged particles onto the magnetar. In this scenario, curvature radiation is emitted by particles accelerated at relativistic by the strong electric fields produced by the disconnection and the subsequent reconnection of the magnetic field lines, a process triggered by the sudden discharge. We modeled the magnetars as charged neutron stars in the static approximation using the exterior metric by the Reissner-Nordström. We also adopted an electrical charge distribution proportional to the mass-energy density, although our results are not strongly sensitive to the specific star's charge distribution, only to the total charge. Our calculations show that the discharge and emission timescales are several milliseconds, compatible with the FRB phenomena for magnetars with a total charge of ∼ 10 20 C and mass and radius in the range of 1.5 to 3.0 M and 10 to 45 km, respectively. Furthermore, the calculated total emitted power of a coherent pulse is 𝑃 𝑡𝑜𝑡 ∼ 10 42−43 𝑒𝑟𝑔/𝑠, and the frequency range and time scale are also consistent with FRBs astronomical observations. Finally, if the magnetar does not collapse after the discharge, the existence of FRB repeater sources can not rule out the existence of a blast repetition after the time needed to magnetosphere recharges and produce a new discharge.

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Section: Discussionmentioning

confidence: 99%

Sudden discharge of young charged magnetars as a new model for FRBs

de Avellar,

Beaklini,

Nunes

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

Sudden discharge of young charged magnetars as a new model for FRBs

Avellar

Beaklini

Nunes

et al. 2021

Monthly Notices of the Royal Astronomical Society

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We propose a new model for Fast Radio Bursts (FRBs) based on a sudden discharge of a charged young magnetar, caused by the short falling timescale of oppositely charged particles onto the magnetar. In this scenario, curvature radiation is emitted by particles accelerated at relativistic by the strong electric fields produced by the disconnection and the subsequent reconnection of the magnetic field lines, a process triggered by the sudden discharge. We modeled the magnetars as charged neutron stars in the static approximation using the exterior metric by the Reissner-Nordström. We also adopted an electrical charge distribution proportional to the mass-energy density, although our results are not strongly sensitive to the specific star’s charge distribution, only to the total charge. Our calculations show that the discharge and emission timescales are several milliseconds, compatible with the FRB phenomena for magnetars with a total charge of ∼1020 C and mass and radius in the range of 1.5 to 3.0 M⊙ and 10 to 45 km, respectively. Furthermore, the calculated total emitted power of a coherent pulse is Ptot ∼ 1042 − 43erg/s, and the frequency range and time scale are also consistent with FRBs astronomical observations. Finally, if the magnetar does not collapse after the discharge, the existence of FRB repeater sources can not rule out the existence of a blast repetition after the time needed to magnetosphere recharges and produce a new discharge.

show abstract

Electrically charged pulsars

Cited by 2 publications

References 27 publications

Sudden discharge of young charged magnetars as a new model for FRBs

Sudden discharge of young charged magnetars as a new model for FRBs

Sudden discharge of young charged magnetars as a new model for FRBs

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