Gravitational Radiation from Neutron Stars and Black Holes

TL;DR

This paper reviews the prospects of gravitational wave detection from neutron stars and black holes, focusing on nonlinear oscillations and extreme-mass-ratio inspirals as promising sources for current and future observatories.

Contribution

It presents new investigations into gravitational wave signatures from neutron star oscillations and black hole inspirals, highlighting their detectability and scientific potential.

Findings

Radial and non-radial oscillations produce distinctive gravitational waves within Earth-based detector bands.

Extreme-mass-ratio inspirals emit low-frequency gravitational waves detectable by space-based observatories.

Potential for gravitational-wave detection to advance fundamental physics understanding.

Abstract

Gravitational Wave Astronomy is becoming a reality as Earth-based interferometric gravitational-wave detectors reach the design sensitivities and move towards advanced configurations that may lead to gravitational-wave detections in the immediate future. In this contribution, I briefly summarize the basic characteristics of this new area, the discovery prospects and the potential for fundamental physics. Then, I present results of some investigations of two different sources of gravitational waves that are potential targets for present and future planned observatories. First, I will discuss the generation of gravitational radiation by non-linear effects arising from the coupling between radial and non-radial oscillations of neutron stars, which may produce distinctive gravitational-wave signatures. The gravitational radiation emitted by these sources is in the frequency band of Earth-based detectors. And second, I will discuss the gravitational-wave emission during the inspiral of extreme-mass-ratio compact binaries. In this case, the gravitational waves have low frequencies, inside the frequency band of space observatories like LISA.