Gravitational Wave Astronomy

Abstract

PACS Codes 95.30.SF, 95.55.YM ■ Abstract The existence of gravitational radiation is a direct prediction of Einstein's theory of general relativity, published in 1916. The observation of gravitational radiation will open a new astronomical window on the universe, allowing the study of dynamic strong-field gravity, as well as many other astrophysical objects and processes impossible to observe with electromagnetic radiation. The relative weakness of the gravitational force makes detection extremely challenging; nevertheless, sustained advances in detection technology have made the observation of gravitational radiation probable in the near future. In this article, we review the theoretical and experimental status of this emerging field. CONTENTS

A comprehensive simulation of weak-light phase-locking for space-borne gravitational wave antenna

“…The addition of the 'G.W. signal' is given based on the references [41][42][43] that the strain amplitude of major LISA G.W. sources, after one year integration, could reach to a level from 21 10 Hz  to 18 10 Hz  strongly depends on the distances and types.…”

Detailing Coherent, Minimum Uncertainty States of Gravitons, as Semi Classical Components of Gravity Waves, and How Squeezed States Affect Upper Limits To Graviton Mass

“…If as an example T  is many times larger than 100 GeV, which is the case if GW nucleation occurred at the ORIGIN of the big bang, i.e. at temperatures 32 10 Kelvin , then it is likely that f in Equation (10) below is capable of approaching values of the order of what was predicted by Grishkuk [26] (2007), i.e. approaching 10 Giga Hertz.…”

Detecting gravitational waves with pulsars

“…For example, detectors such as the European-based VIRGO and GEO600 and the US-based LIGO use powerful lasers directed down orthogonal arms several kilometers long to attempt to detect the passage of a GW by sophisticated extensions of Michelson interferometry [1]. These detectors are sensitive to gravitational waves with periods comparable to the light travel time across the array: tens of microseconds.…”