Literature DB >> 36224419

Optical superluminal motion measurement in the neutron-star merger GW170817.

Kunal P Mooley1,2, Jay Anderson3, Wenbin Lu4,5,6,7.   

Abstract

The afterglow of the binary neutron-star merger GW1708171 gave evidence for a structured relativistic jet2-6 and a link3,7,8 between such mergers and short gamma-ray bursts. Superluminal motion, found using radio very long baseline interferometry3 (VLBI), together with the afterglow light curve provided constraints on the viewing angle (14-28 degrees), the opening angle of the jet core (less than 5 degrees) and a modest limit on the initial Lorentz factor of the jet core (more than 4). Here we report on another superluminal motion measurement, at seven times the speed of light, leveraging Hubble Space Telescope precision astrometry and previous radio VLBI data for GW170817. We thereby obtain a measurement of the Lorentz factor of the wing of the structured jet, as well as substantially improved constraints on the viewing angle (19-25 degrees) and the initial Lorentz factor of the jet core (more than 40).
© 2022. The Author(s), under exclusive licence to Springer Nature Limited.

Entities:  

Year:  2022        PMID： 36224419     DOI： 10.1038/s41586-022-05145-7

Source DB:  PubMed          Journal:  Nature        ISSN： 0028-0836            Impact factor:   69.504


  5 in total

1.  Compact radio emission indicates a structured jet was produced by a binary neutron star merger.

Authors:  G Ghirlanda; O S Salafia; Z Paragi; M Giroletti; J Yang; B Marcote; J Blanchard; I Agudo; T An; M G Bernardini; R Beswick; M Branchesi; S Campana; C Casadio; E Chassande-Mottin; M Colpi; S Covino; P D'Avanzo; V D'Elia; S Frey; M Gawronski; G Ghisellini; L I Gurvits; P G Jonker; H J van Langevelde; A Melandri; J Moldon; L Nava; A Perego; M A Perez-Torres; C Reynolds; R Salvaterra; G Tagliaferri; T Venturi; S D Vergani; M Zhang
Journal:  Science       Date:  2019-02-21       Impact factor: 47.728

2.  A dust-enshrouded tidal disruption event with a resolved radio jet in a galaxy merger.

Authors:  S Mattila; M Pérez-Torres; A Efstathiou; P Mimica; M Fraser; E Kankare; A Alberdi; M Á Aloy; T Heikkilä; P G Jonker; P Lundqvist; I Martí-Vidal; W P S Meikle; C Romero-Cañizales; S J Smartt; S Tsygankov; E Varenius; A Alonso-Herrero; M Bondi; C Fransson; R Herrero-Illana; T Kangas; R Kotak; N Ramírez-Olivencia; P Väisänen; R J Beswick; D L Clements; R Greimel; J Harmanen; J Kotilainen; K Nandra; T Reynolds; S Ryder; N A Walton; K Wiik; G Östlin
Journal:  Science       Date:  2018-06-14       Impact factor: 47.728

3.  GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral.

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Journal:  Phys Rev Lett       Date:  2017-10-16       Impact factor: 9.161

4.  A mildly relativistic wide-angle outflow in the neutron-star merger event GW170817.

Authors:  K P Mooley; E Nakar; K Hotokezaka; G Hallinan; A Corsi; D A Frail; A Horesh; T Murphy; E Lenc; D L Kaplan; K De; D Dobie; P Chandra; A Deller; O Gottlieb; M M Kasliwal; S R Kulkarni; S T Myers; S Nissanke; T Piran; C Lynch; V Bhalerao; S Bourke; K W Bannister; L P Singer
Journal:  Nature       Date:  2017-11-20       Impact factor: 49.962

5.  Superluminal motion of a relativistic jet in the neutron-star merger GW170817.

Authors:  K P Mooley; A T Deller; O Gottlieb; E Nakar; G Hallinan; S Bourke; D A Frail; A Horesh; A Corsi; K Hotokezaka
Journal:  Nature       Date:  2018-09-05       Impact factor: 49.962
  5 in total

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