Abstract
We study the putative emission of gravitational waves (GWs) in particular for pulsars with measured braking index. We show that the appropriate combination of both GW emission and magnetic dipole brakes can naturally explain the measured braking index, when the surface magnetic field and the angle between the magnetic dipole and rotation axes are time dependent. Then we discuss the detectability of these very pulsars by aLIGO and the Einstein Telescope. We call attention to the realistic possibility that aLIGO can detect the GWs generated by at least some of these pulsars, such as Vela, for example.
Highlights
Gravitational waves (GWs) have been detected [1]
This equation can be interpreted as follows: the term on the left side stands for the resulting deceleration due to magnetic dipole and gravitational waves (GWs) brakes, the first and the second terms on the right side denote the independent contributions of these decelerating processes, respectively
In this paper we study the putative emission of GWs generated in particular by pulsars with measured braking indices
Summary
Gravitational waves (GWs) have been detected [1]. The signal was identified as coming from the final fraction of a second of the coalescence of two black holes (BHs), which resulted in a spinning remnant black hole. The so-called braking index (n), which is a quantity closely related to the pulsar spindown, can provide information as regards the pulsars’ energy loss mechanisms. Such mechanisms can include GW emission, among others. Since pulsars can spindown through gravitational emission associated to asymmetric deformations (see e.g., [20,21]), it is appropriate to take into account this mechanism in a model which aims to explain the braking indices which have been measured.
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