Simulating the effect of the Sgr A* accretion flow on the appearance of G2 after pericenter

Abstract

We study the dynamical interaction of the G2 cloud with the accretion flow around Sgr A* by means of three-dimensional, hydrodynamic simulations. We show the effects of the rotating accretion flow on the evolution of G2 by projecting the cloud density onto the plane of the sky, and extracting position-velocity diagrams. We study a number of possible orientations of the cloud orbit with respect to the disk. We find that once the center of mass of the cloud has crossed the pericenter, the differences between models becomes significant. Models with the cloud counter-rotating with respect to the disk are expected to reach higher blue-shifted line of sight velocities. The spatial extent of the emission depends strongly on the cloud-to-disk inclination angle. Future imaging and spectroscopy of G2 emission will shed light both on the structure of the Sgr A* disk and on the properties of the cloud.

14 pages, 11 figures

References in corpus (8)

• Dissecting X-ray-emitting Gas around the Center of our Galaxy
• 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
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• Pericenter passage of the gas cloud G2 in the Galactic Center
• Hydrodynamical simulations of a compact source scenario for the Galactic Center cloud G2
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Cited by in corpus (14)

• Hot Accretion Flows Around Black Holes
• Magnetized Gas Clouds can Survive Acceleration by a Hot Wind
• Detection of Galactic Center source G2 at 3.8 $\mu$m during periapse passage
• The Galactic Center cloud G2 and its gas streamer
• Fifteen years of XMM-Newton and Chandra monitoring of Sgr A*: Evidence for a recent increase in the bright flaring rate
• Spitzer/IRAC Observations of the Variability of Sgr A* and the Object G2 at 4.5 microns
• The Galactic Center: Improved Relative Astrometry for Velocities, Accelerations, and Orbits near the Supermassive Black Hole
• Very-high energy observations of the Galactic center region by VERITAS in 2010-2012
• Polarized near-infrared light of the Dusty S-cluster Object (DSO/G2) at the Galactic Center
• A Stellar Wind Origin for the G2 Cloud: Three-Dimensional Numerical Simulations
• Stellar Populations in the Central 0.5 pc of Our Galaxy III: The Dynamical Sub-structures
• A Possible Time-Delayed Brightening of the Sgr A* Accretion Flow after the Pericenter Passage of G2 Cloud
• 3D AMR hydrosimulations of a compact source scenario for the Galactic Centre cloud G2
• G2 and Sgr A*: A Cosmic Fizzle At The Galactic Center