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

Abstract

We perform detailed magnetohydrodynamic simulations of the gas cloud G2 interacting with the accretion flow around the Galactic Center 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 orbit pericenter 7 to 9 months earlier than the center-of-mass.

revised version, accounts for the new orbital model and recent observations; 8 pages, 7 figures, submitted to MNRAS

References in corpus (4)

• Shocks and cold fronts in galaxy clusters
• An Unambiguous Detection of Faraday Rotation in Sagittarius A*
• The Submillimeter Bump in Sgr A* from Relativistic MHD Simulations
• Semi-implicit scheme for treating radiation under M1 closure in general relativistic conservative fluid dynamics codes

Cited by in corpus (16)

• Magnetized Gas Clouds can Survive Acceleration by a Hot Wind
• Radio and Millimeter Monitoring of Sgr A*: Spectrum, Variability, and Constraints on the G2 Encounter
• Coupled jet-disk model for Sgr A*: explaining the flat-spectrum radio core with GRMHD simulations of jets
• The Galactic Center cloud G2 and its gas streamer
• Keck Observations of the Galactic Center Source G2: Gas Cloud or Star?
• Dust-enshrouded star near supermassive black hole: predictions for high-eccentricity passages near low-luminosity galactic nuclei
• The Post-Pericenter Evolution of the Galactic Center Source G2
• A Stellar Wind Origin for the G2 Cloud: Three-Dimensional Numerical Simulations
• Radio Synchrotron Emission from the Bow Shock of G2
• Simulating the effect of the Sgr A* accretion flow on the appearance of G2 after pericenter
• No Microwave Flare of Sagittarius A* around the G2 Periastron Passing
• A Possible Time-Delayed Brightening of the Sgr A* Accretion Flow after the Pericenter Passage of G2 Cloud
• S0-2 star, G1- and G2-objects and flaring activity of the Milky Way's Galactic Center black hole in 2019
• 3D AMR hydrosimulations of a compact source scenario for the Galactic Centre cloud G2
• The Keplerian orbit of G2
• G2 and Sgr A*: A Cosmic Fizzle At The Galactic Center