English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The short GRB 170817A, detected by the Fermi Gamma-ray Burst Monitor,orbiting satellites and ground-based telescopes, was the electromagneticcounterpart of a gravitational-wave transient (GW170817) from a binary neutronstar merger. After this merger the $\gamma$-ray light curve exhibited a faintpeak at $\sim$ 1.7s and the X-ray, optical and radio light curves displayed anextended emission which increased in brightness up to $\sim$ 160 days. In thispaper, we show that the X-ray, optical and radio fluxes are consistent with thesynchrotron forward-shock model viewed off-axis when the matter in the outflowis parametrized through a power law velocity distribution. We discuss theorigin of the $\gamma$-ray peak in terms of internal and external shocks. Weshow that the $\gamma$-ray flux might be consistent with a synchrotronself-Compton reverse-shock model observed at high latitudes. Comparing thebest-fit values obtained after describing the $\gamma$-ray, X-ray, optical andradio fluxes with our model, we find that the afterglow and $\gamma$-rayemission occurred in different regions and also evidence to propose that theprogenitor environment was entrained with magnetic fields and therefore, weargue for the presence of the magnetic field amplification in the binaryneutron star merger.

The short GRB 170817A: Modelling the off-axis emission and implications on the ejecta magnetization