Effect of Fluid Composition on a Jet Breaking out of a Cocoon in Gamma-Ray Bursts: A Relativistic de Laval Nozzle Treatment

Mukesh K. Vyas

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

In this paper we carry out a semi-analytic general relativistic study of a Gamma-Ray Bursts (GRB) jet that is breaking out of a cocoon or stellar envelope. We solve hydrodynamic equations with the relativistic equation of state that takes care of fluid composition. In short GRBs, a general relativistic approach is required to account for curved spacetime in strong gravity. The piercing of the jet through the cocoon resembles a de Laval nozzle and the jet may go through recollimation shock transitions. We show that the possibility of shock transition and the shock properties are sensitive to the matter composition and the cocoon strength. Obtained Lorentz factors in thermally driven jets comfortably reach few ×10.

Original languageEnglish
Article number294
JournalUniverse
Volume8
Issue number6
DOIs
StatePublished - Jun 2022

Bibliographical note

Publisher Copyright:
© 2022 by the author. Licensee MDPI, Basel, Switzerland.

Funding

Acknowledgments: I am thankful to the anonymous reviewers who helped in clarifying various aspects of the study and I am grateful to Asaf Pe’er for an insightful discussion and important suggestions. I further acknowledge the support from Israel government’s PBC program and the European Union (EU) via ERC consolidator grant 773062 (O.M.J.)

FundersFunder number
European Commission
European Commission773062

    Keywords

    • Fermi acceleration
    • astrophysical shocks
    • gamma ray bursts
    • high energy astrophysics
    • relativistic hydrodynamics
    • theoretical models

    Fingerprint

    Dive into the research topics of 'Effect of Fluid Composition on a Jet Breaking out of a Cocoon in Gamma-Ray Bursts: A Relativistic de Laval Nozzle Treatment'. Together they form a unique fingerprint.

    Cite this