Sources of gravitational waves: Theory and observations

Alessandra Buonanno, B. S. Sathyaprakash

Research output: Chapter in Book/Report/Conference proceedingChapter

13 Citations (Scopus)

Abstract

Historical perspective James Clerk Maxwell discovered in 1865 that electromagnetic phenomena satisfied wave equations and found that the velocity of these waves in vacuum was numerically the same as the speed of light [1]. Maxwell was puzzled at this coincidence between the speed of light and his theoretical prediction for the speed of electromagnetic phenomena and proposed that “light is electromagnetic disturbance propagated through the field according to electromagnetic laws” [1]. Because any theory of gravitation consistent with special relativity cannot be an action-at-a-distance theory, in many ways, Maxwell’s theory, being the first relativistic physical theory, implied the existence of gravitational waves (GWs) in general relativity (GR). Indeed, years before Einstein derived the wave equation in the linearised version of his field equations and discussed the generation of GWs as one of the first consequences of his new theory of gravity [2, 3], Henri Poincaré proposed the existence of les ondes gravifiques purely based on consistency of gravity with special relativity [4]. However, for many years GWs caused much controversy and a lot of doubt was cast on their existence [5-8]. The year 1959 was, in many ways, the turning point-it was the year of publication of a seminal paper by Bondi, Pirani and Robinson [6] on the exact plane wave solution with cylindrical symmetry and the energy carried by the waves [9]. This paper proved that wave solutions exist not just in the weak-field approximation and that GWs in GR carry energy and angular momentum away from their sources. These results cleared the way for Joseph Weber [10] to start pioneering experimental efforts. The discovery of the Hulse–Taylor binary [11], a system of two neutron stars in orbit around each other, led to the first observational evidence for the existence of gravitational radiation [12]. The loss of energy and angular momentum to GWs causes the two stars in this system to slowly spiral in towards each other.

Original languageEnglish (US)
Title of host publicationGeneral Relativity and Gravitation
Subtitle of host publicationA Centennial Perspective
PublisherCambridge University Press
Pages287-346
Number of pages60
ISBN (Electronic)9781139583961
ISBN (Print)9781107037311
DOIs
StatePublished - Jan 1 2015

Fingerprint

gravitational waves
relativity
electromagnetism
gravitation
wave equations
angular momentum
kinetic energy
neutron stars
casts
plane waves
disturbances
orbits
stars
vacuum
causes
symmetry
predictions
approximation
energy

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Buonanno, A., & Sathyaprakash, B. S. (2015). Sources of gravitational waves: Theory and observations. In General Relativity and Gravitation: A Centennial Perspective (pp. 287-346). Cambridge University Press. https://doi.org/10.1017/CBO9781139583961.009
Buonanno, Alessandra ; Sathyaprakash, B. S. / Sources of gravitational waves : Theory and observations. General Relativity and Gravitation: A Centennial Perspective. Cambridge University Press, 2015. pp. 287-346
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Buonanno, A & Sathyaprakash, BS 2015, Sources of gravitational waves: Theory and observations. in General Relativity and Gravitation: A Centennial Perspective. Cambridge University Press, pp. 287-346. https://doi.org/10.1017/CBO9781139583961.009

Sources of gravitational waves : Theory and observations. / Buonanno, Alessandra; Sathyaprakash, B. S.

General Relativity and Gravitation: A Centennial Perspective. Cambridge University Press, 2015. p. 287-346.

Research output: Chapter in Book/Report/Conference proceedingChapter

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Buonanno A, Sathyaprakash BS. Sources of gravitational waves: Theory and observations. In General Relativity and Gravitation: A Centennial Perspective. Cambridge University Press. 2015. p. 287-346 https://doi.org/10.1017/CBO9781139583961.009