Gravitational waves from pulsars in the context of magnetic ellipticity

Abstract

In one of our previous articles we have considered the role of a time dependent magnetic ellipticity on pulsars' braking indices and on the putative gravitational waves these objects can emit. Since only nine of more than 2000 known pulsars have accurately measured braking indices, it is of interest to extend this study to all known pulsars, in particular to what concerns the gravitational waves generation. To do so, as shown in our previous article, we need to know some pulsars' observable quantities such as: periods and their time derivatives, and estimated distances to the Earth. Moreover, we also need to know the pulsars' masses and radii, for which, in here we are adopting current fiducial values. Our results show that the gravitational wave amplitude is at best $h\sim 10^{-28}$. This leads to a pessimistic prospect for the detection of gravitational waves generated by these pulsars, even for Advanced LIGO and Advanced Virgo, and the planned Einstein Telescope, whether the ellipticity has magnetic origin.

45 pages, 6 figures

References in corpus (5)

• First search for gravitational waves from known pulsars with Advanced LIGO
• Gravitational Waves from Pulsars and Their Braking Indices: The Role of a Time Dependent Magnetic Ellipticity
• Gravitational wave emission by the high braking index pulsar PSR J1640-4631
• A Very Large (${\theta }_E\gtrsim 40$") Strong Gravitational Lens Selected with the Sunyaev-Zel'dovich Effect: PLCK G287.0+32.9 ($z$ = 0.38)
• Gravitational waves from pulsars with measured braking index

Cited by in corpus (11)

• Searches for Continuous-Wave Gravitational Radiation
• Gravitational-wave constraints on the equatorial ellipticity of millisecond pulsars
• Gravitational waves from fast-spinning white dwarfs
• Evidence for a multipolar magnetic field in SGR J1745-2900 from X-ray light-curve analysis
• Born-Infeld magnetars: larger than classical toroidal magnetic fields and implications for gravitational-wave astronomy
• Constraining the ellipticity of new-born magnetar with the observational data of Long gamma-ray bursts
• Gravitational waves from SGRs and AXPs as fast-spinning white dwarfs
• Continuous Gravitational Waves and Magnetic Monopole Signatures from Single Neutron Stars
• Prospects for the Observation of Continuous Gravitational Waves from Deformed Fast-spinning White Dwarfs
• Observational Constraints on the Pulsar Wind Model: The Cases of Crab and Vela
• Gravitational Wave Emission by Accretion of Matter and Magnetic Deformation in Fast Rotating White Dwarfs