SIMBAD references

2016ApJ...823...34E - Astrophys. J., 823, 34-34 (2016/May-3)

The inclination angle and evolution of the braking index of pulsars with plasma-filled magnetosphere: application to the high braking index of PSR J1640-4631.

EKSI K.Y., ANDAC I.C., CIKINTOGLU S., GUGERCINOGLU E., VAHDAT MOTLAGH A. and KIZILTAN B.

Abstract (from CDS):

The recently discovered rotationally powered pulsar PSR J1640-4631 is the first to have a braking index measured, with high enough precision, that is greater than 3. An inclined magnetic rotator in vacuum or plasma would be subject not only to spin-down but also to an alignment torque. The vacuum model can address the braking index only for an almost orthogonal rotator, which is incompatible with the single-peaked pulse profile. The magnetic dipole model with the corotating plasma predicts braking indices between 3 and 3.25. We find that the braking index of 3.15 is consistent with two different inclination angles, 18.°5±3° and 56°±4°. The smaller angle is preferred given that the pulse profile has a single peak and the radio output of the source is weak. We infer the change in the inclination angle to be at the rate -0.°23 per century, three times smaller in absolute value than the rate recently observed for the Crab pulsar.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): pulsars: general - pulsars: individual: PSR J1640-4631 - stars: evolution

Simbad objects: 4

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2021.03.04-14:36:54

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