Colliding wind binaries and γ-ray binaries: Relativistic version of the RAMSES code

Astrid Lamberts, Guillaume Dubus, Sébastien Fromang, Geoffroy Lesur

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

γ-ray binaries are colliding wind binaries (CWB) composed of a massive star a nonaccreting pulsar with a highly relativistic wind. Particle acceleration at the shocks results in emission going from extended radio emission to the γ-ray band. The interaction region is expected to show common features with stellar CWB. Performing numerical simulations with the hydrodynamical code RAMSES, we focus on their structure and stability and find that the Kelvin-Helmholtz instability (KHI) can lead to important mixing between the winds and destroy the large scale spiral structure. To investigate the impact of the relativistic nature of the pulsar wind, we extend RAMSES to relativistic hydrodynamics (RHD). Preliminary simulations of the interaction between a pulsar wind and a stellar wind show important similarities with stellar colliding winds with small relativistic corrections.

Original languageEnglish
Title of host publicationHigh Energy Gamma-Ray Astronomy - 5th International Meeting on High Energy Gamma-Ray Astronomy
Pages406-409
Number of pages4
DOIs
Publication statusPublished - 1 Dec 2012
Externally publishedYes
Event5th International Meeting on High Energy Gamma-Ray Astronomy - Heidelberg, Germany
Duration: 9 Jul 201213 Jul 2012

Publication series

NameAIP Conference Proceedings
Volume1505
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference5th International Meeting on High Energy Gamma-Ray Astronomy
Country/TerritoryGermany
CityHeidelberg
Period9/07/1213/07/12

Keywords

  • Gamma-ray binaries
  • Instabilities
  • Methods : numerical
  • Outflows
  • Relativity
  • Stars : winds

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