Location of the bow shock ahead of cloud G2 at the Galactic Centre

Aleksander Sa̧dowski, Ramesh Narayan, Lorenzo Sironi, Feryal Özel

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


We perform detailed magnetohydrodynamic simulations of the gas cloud G2 interacting with the accretion flow around the Galactic Centre black hole Sgr A*. We take as our initial conditions a steady-state, converged solution of the accretion flow obtained earlier using the general-relativistic magnetohydrodynamic code HARM. Using the observed parameters for the cloud's orbit, we compute the interaction of the cloud with the ambient gas and identify the shock structure that forms ahead of the cloud. We show that for many configurations, the cloud front crosses the orbit pericentre seven to nine months earlier than the centre-of-mass.

Original languageEnglish (US)
Pages (from-to)2165-2171
Number of pages7
JournalMonthly Notices of the Royal Astronomical Society
Issue number3
StatePublished - Aug 11 2013


  • Acceleration of particles
  • Accretion
  • Accretion discs
  • Black hole physics
  • Radiation mechanisms: non-thermal

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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