Takayuki R. Saitoh, Junichiro Makino, Yoshiharu Asaki, Junichi Baba, Shinya Komugi, Makoto Miyoshi, Tohru Nagao, Masaaki Takahashi, Takaaki Takeda, Masato Tsuboi, Ken-ichi Wakamatsu
A compact gas cloud G2 (Gillessen+2012) is predicted to reach the pericentre of its orbit around the super massive black hole (SMBH) of our galaxy, Sagittarius (Sgr A*), by summer 2013. This event will give us a rare opportunity to observe the interaction between SMBH and gas around it. We report the result of the fully three-dimensional simulation of the evolution of G2 during the first pericentre passage. The strong tidal force by the SMBH stretches the cloud along its orbit, and compress it strongly in the vertical direction, resulting in the heating up and flaring up of the cloud. The bolometric luminosity will reach the maximum of 100 $L_{\odot}$ by July 2013. This flare should be easily observed in the near infrared.
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http://arxiv.org/abs/1212.0349
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