3D AMR hydrosimulations of a compact source scenario for the Galactic Centre cloud G2

Abstract

The nature of the gaseous and dusty cloud G2 in the Galactic Centre is still under debate. We present three-dimensional hydrodynamical adaptive mesh refinement (AMR) simulations of G2, modeled as an outflow from a "compact source" moving on the observed orbit. The construction of mock position-velocity (PV) diagrams enables a direct comparison with observations and allow us to conclude that the observational properties of the gaseous component of G2 could be matched by a massive (${\dot{M}}_{\mathrm{w}}=5\times 10^{-7}{M}_{\odot }\mathrm{y}{\mathrm{r}}^{-1}$) and slow ($50\mathrm{km}{\mathrm{s}}^{-1}$) outflow, as observed for T Tauri stars. In order for this to be true, only the material at larger ($>100\mathrm{AU}$) distances from the source must be actually emitting, otherwise G2 would appear too compact compared to the observed PV diagrams. On the other hand, the presence of a central dusty source might be able to explain the compactness of G2's dust component. In the present scenario, 5-10 years after pericentre the compact source should decouple from the previously ejected material, due to the hydrodynamic interaction of the latter with the surrounding hot and dense atmosphere. In this case, a new outflow should form, ahead of the previous one, which would be the smoking gun evidence for an outflow scenario.

resubmitted to MNRAS after referee report, 16 pages, 11 figures

References in corpus (58)

• Monitoring stellar orbits around the Massive Black Hole in the Galactic Center
• PLUTO: a Numerical Code for Computational Astrophysics
• Measuring Distance and Properties of the Milky Way's Central Supermassive Black Hole with Stellar Orbits
• The Galactic Center Massive Black Hole and Nuclear Star Cluster
• A Multi-Code Analysis Toolkit for Astrophysical Simulation Data
• The Two Young Star Disks in the Central Parsec of the Galaxy: Properties, Dynamics and Formation
• The PLUTO Code for Adaptive Mesh Computations in Astrophysical Fluid Dynamics
• Elemental Abundances in QSOs: Star Formation and Galactic Nuclear Evolution at High Redshifts
• A Disk of Young Stars at the Galactic Center as Determined by Individual Stellar Orbits
• On the Evolutionary Status of Class I Stars and Herbig-Haro Energy Sources in Taurus-Auriga
• A gas cloud on its way towards the super-massive black hole in the Galactic Centre
• PS1-10jh: The Disruption of a Main-Sequence Star of Near-Solar Composition
• Evidence for Warped Disks of Young Stars in the Galactic Center
• Probing T Tauri Accretion and Outflow with 1 Micron Spectroscopy
• Magnetized Gas Clouds can Survive Acceleration by a Hot Wind
• Stellar and wind properties of massive stars in the central parsec of the Galaxy
• Merging Binaries in the Galactic Center: The eccentric Kozai-Lidov mechanism with stellar evolution
• Physics of the Galactic Center Cloud G2, on its Way towards the Super-Massive Black Hole
• The First Laser Guide Star Adaptive Optics Observations of the Galactic Center: Sgr A*'s Infrared Color and the Extended Red Emission in its Vicinity
• Radio and Millimeter Monitoring of Sgr A*: Spectrum, Variability, and Constraints on the G2 Encounter
• Detection of Galactic Center source G2 at 3.8 $\mu$m during periapse passage
• Simulations of the Origin and Fate of the Galactic Center Cloud G2
• 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
• Keck Observations of the Galactic Center Source G2: Gas Cloud or Star?
• Secular Evolution Of Binaries Near Massive Black Holes: Formation of compact binaries, merger/collision products and G2-like objects
• Pericenter passage of the gas cloud G2 in the Galactic Center
• New observations of the gas cloud G2 in the Galactic Center
• The Galactic Center Cloud G2 -- a Young Low-Mass Star with a Stellar Wind
• Three-Dimensional Moving-Mesh Simulations of Galactic Center Cloud G2
• Hydrodynamical simulations of a compact source scenario for the Galactic Center cloud G2
• Monitoring the Dusty S-Cluster Object (DSO/G2) on its Orbit towards the Galactic Center Black Hole
• Radio light curves during the passage of cloud G2 near Sgr A*
• Radio Synchrotron Emission from a Bow Shock around the Gas Cloud G2 Heading toward the Galactic Center
• A dual emission mechanism in Sgr A*/L' ?
• The infrared L'-band view of the Galactic Center with NAOS-CONICA at VLT
• Possible Origin of the G2 Cloud from the Tidal Disruption of a Known Giant Star by Sgr A*
• 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 nova origin of the gas cloud at the Galactic Center ?
• A star disrupted by a stellar black hole as the origin of the cloud falling toward the Galactic center
• Clump formation through colliding stellar winds in the Galactic Centre
• The Properties and Fate of the Galactic Center G2 Cloud
• Multi-epoch Sub-arcsecond [Fe II] Spectroimaging of the DG Tau Outflows with NIFS. I. First data epoch
• Revealing the fastest component of the DG Tau outflow through X-rays
• Multiwavelength study of the flaring activity of Sgr A* in 2014 February-April
• Nature of the Galactic centre NIR-excess sources. I. What can we learn from the continuum observations of the DSO/G2 source?
• Detection of the Sgr A* activity at 3.8 and 4.8 microns with NACO
• Location of the bow shock ahead of cloud G2 at the Galactic Center
• A Stellar Wind Origin for the G2 Cloud: Three-Dimensional Numerical Simulations
• Radio Synchrotron Emission from the Bow Shock of G2
• Modelling Accretion Disk and Stellar Wind Interactions: the Case of Sgr A*
• 3D adaptive mesh refinement simulations of the gas cloud G2 born within the disks of young stars in the Galactic Center
• Effect of an isotropic outflow from the Galactic centre on the bow-shock evolution along the orbit
• Using gas clouds to probe the accretion flow around SgrA*: G2's delayed pericenter passage
• Simulating the effect of the Sgr A* accretion flow on the appearance of G2 after pericenter
• Monitoring the Galactic Centre with Australia Telescope Compact Array
• The G2+G2t complex as a fast and massive outflow?

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• Tidal phenomena in the Galactic Center: The curious case of X7