CERN Accelerating science

Article
Title	The gravitational wave and short gamma-ray burst GW170817/SHB170817A
Author(s)	De Rujula, Alvaro (CERN ; Madrid, IFT)
Publication	2022
Number of pages	10
In:	Nuovo Cimento C 46 (2023) 5
In:	35th Rencontres de Physique de La Vallée d'Asoste (La Thuile 2022), La Thuile, Italy, 6 - 12 Mar 2022, pp.5
DOI	10.1393/ncc/i2023-23005-2
Subject category	Astrophysics and Astronomy ; General Relativity and Cosmology
Abstract	This event, so far unique, beautifully confirmed the standard views on the gravitational waves produced by a merger of two neutron stars, but its electromagnetic multi-wavelenth observations disagreed with the numerous initial versions of the “standard fireball model(s)” of gamma ray bursts. Contrariwise, they provided strong evidence in favour of the “cannonball” model. Most uncontroversially, a cannonball was observed at radio wavelengths, with an overwhelming statistical significance (>17 σ), and travelling in the plane of the sky, as expected, at an average apparent superluminal velocity V$_{app}$ ∼ $4 c$.
Copyright/License	CC-BY-4.0

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