PHYSICS OF THE GALACTIC CENTER CLOUD G2, ON ITS WAY TOWARD THE SUPERMASSIVE BLACK HOLE

@article{Burkert2012PHYSICSOT,
  title={PHYSICS OF THE GALACTIC CENTER CLOUD G2, ON ITS WAY TOWARD THE SUPERMASSIVE BLACK HOLE},
  author={A. Burkert and Marc Schartmann and Christian Alig and Stefan Gillessen and Reinhard Genzel and Tobias K. Fritz and Frank Eisenhauer},
  journal={The Astrophysical Journal},
  year={2012},
  volume={750}
}
We investigate the origin, structure, and evolution of the small gas cloud G2, which is on an orbit almost straight into the Galactic central supermassive black hole (SMBH). G2 is a sensitive probe of the hot accretion zone of Sgr A*, requiring gas temperatures and densities that agree well with models of captured shock-heated stellar winds. Its mass is equal to the critical mass below which cold clumps would be destroyed quickly by evaporation. Its mass is also constrained by the fact that at… 

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