The binary neutron star merger event GW170817 was detected through both electromagnetic radiation and gravitational waves. Its afterglow emission may have been produced by either a narrow relativistic jet or an isotropic outflow. High-spatial-resolution measurements of the source size and displacement can discriminate between these scenarios.We present very-long-baseline interferometry observations, performed 207.4 days after the merger by using a global network of 32 radio telescopes. The apparent source size is constrained to be smaller than 2.5 milli–arc seconds at the 90% confidence level. This excludes the isotropic outflow scenario, which would have produced a larger apparent size, indicating that GW170817 produced a structured relativistic jet. Our rate calculations show that at least 10% of neutron star mergers produce such a jet.
Compact radio emission indicates a structured jet was produced by a binary neutron star merger / Ghirlanda, G.; Salafia, O. S.; Paragi, Z.; Giroletti, M.; Yang, J.; Marcote, B.; Blanchard, J.; Agudo, I.; An, T.; Bernardini, M. G.; Beswick, R.; Branchesi, M.; Campana, S.; Casadio, C.; Chassande-Mottin, E.; Colpi, M.; Covino, S.; D'Avanzo, P.; D'Elia, V.; Frey, S.; Gawronski, M.; Ghisellini, G.; Gurvits, L. I.; Jonker, P. G.; van Langevelde, H. J.; Melandri, A.; Moldon, J.; Nava, L.; Perego, A.; Perez-Torres, M. A.; Reynolds, C.; Salvaterra, R.; Tagliaferri, G.; Venturi, T.; Vergani, S. D.; Zhang, M.. - In: SCIENCE. - ISSN 1095-9203. - 363:6430(2019), pp. 968-971. [10.1126/science.aau8815]
Titolo: | Compact radio emission indicates a structured jet was produced by a binary neutron star merger | |
Autori: | Ghirlanda, G.; Salafia, O. S.; Paragi, Z.; Giroletti, M.; Yang, J.; Marcote, B.; Blanchard, J.; Agudo, I.; An, T.; Bernardini, M. G.; Beswick, R.; Branchesi, M.; Campana, S.; Casadio, C.; Chassande-Mottin, E.; Colpi, M.; Covino, S.; D'Avanzo, P.; D'Elia, V.; Frey, S.; Gawronski, M.; Ghisellini, G.; Gurvits, L. I.; Jonker, P. G.; van Langevelde, H. J.; Melandri, A.; Moldon, J.; Nava, L.; Perego, A.; Perez-Torres, M. A.; Reynolds, C.; Salvaterra, R.; Tagliaferri, G.; Venturi, T.; Vergani, S. D.; Zhang, M. | |
Autori Unitn: | ||
Titolo del periodico: | SCIENCE | |
Anno di pubblicazione: | 2019 | |
Numero e parte del fascicolo: | 6430 | |
Codice identificativo Scopus: | 2-s2.0-85062385835 | |
Codice identificativo WOS: | WOS:000460194200043 | |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1126/science.aau8815 | |
Handle: | http://hdl.handle.net/11572/232034 | |
Citazione: | Compact radio emission indicates a structured jet was produced by a binary neutron star merger / Ghirlanda, G.; Salafia, O. S.; Paragi, Z.; Giroletti, M.; Yang, J.; Marcote, B.; Blanchard, J.; Agudo, I.; An, T.; Bernardini, M. G.; Beswick, R.; Branchesi, M.; Campana, S.; Casadio, C.; Chassande-Mottin, E.; Colpi, M.; Covino, S.; D'Avanzo, P.; D'Elia, V.; Frey, S.; Gawronski, M.; Ghisellini, G.; Gurvits, L. I.; Jonker, P. G.; van Langevelde, H. J.; Melandri, A.; Moldon, J.; Nava, L.; Perego, A.; Perez-Torres, M. A.; Reynolds, C.; Salvaterra, R.; Tagliaferri, G.; Venturi, T.; Vergani, S. D.; Zhang, M.. - In: SCIENCE. - ISSN 1095-9203. - 363:6430(2019), pp. 968-971. [10.1126/science.aau8815] | |
Appare nelle tipologie: | 03.1 Articolo su rivista (Journal article) |
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Compact radio emission.pdf | Pre-print non referato (Non-refereed preprint) | Tutti i diritti riservati (All rights reserved) | Open Access Visualizza/Apri |