3D AMR simulations of G2 as an outflow

Abstract

We study the evolution of G2 in a \textit{Compact Source Scenario}, where G2 is the outflow from a low-mass central star moving on the observed orbit. This is done through 3D AMR simulations of the hydrodynamic interaction of G2 with the surrounding hot accretion flow. A comparison with observations is done by means of mock position-velocity (PV) diagrams. We found that a massive (${\dot{M}}_{\mathrm{w}}=5\times 10^{-7}{M}_{\odot }\mathrm{y}{\mathrm{r}}^{-1}$) and slow ($v_{\mathrm{w}}=50\mathrm{km}{\mathrm{s}}^{-1}$) outflow can reproduce G2's properties. A faster outflow ($v_{\mathrm{w}}=400\mathrm{km}{\mathrm{s}}^{-1}$) might also be able to explain the material that seems to follow G2 on the same orbit.

2 pages, 1 figure, Proceedings of IAU Symposium 322: The Multi-Messenger Astrophysics of the Galactic Centre