Conveners
The Galactic Centre cloud G2
- Andreas Burkert (MPE/LMU)
The Galactic Centre cloud G2
- Andreas Burkert (MPE/LMU)
The Galactic Centre cloud G2
- Stefan Gillessen (MPE)
The Galactic Centre cloud G2
- Stefan Gillessen (MPE)
-
Dr Stefan Gillessen (MPE)18/03/2013, 10:00ReviewMeasurements of stellar orbits provide compelling evidence that the compact radio source Sagittarius A* at the Galactic Centre is a black hole four million times the mass of the Sun. With the exception of modest X-ray and infrared flares Sgr A* is surprisingly faint, suggesting that the accretion rate currently is very low. In 2011 we discovered a dense gas cloud approximately three times the...Go to contribution page
-
Leo Meyer (University of California, Los Angeles)18/03/2013, 11:15HighlightWe present new observations and analysis of G2 – the intriguing red emission-line Galactic-center object that is fast approaching the central black hole on what appears to be a very eccentric orbit. The observations were obtained with the laser guide star Adaptive Optics systems on the W. M. Keck I and II telescopes and include spectroscopy (R ∼ 3600) centered on the Br-γ line and K’ (2.2 μm)...Go to contribution page
-
Ruth Murray-Clay (Harvard University)18/03/2013, 11:45Highlight
-
Nick Scoville (Caltech)18/03/2013, 14:00HighlightWe explore the possibility that the G2 gas cloud falling in towards Sgr A* is the mass loss envelope of a young TTauri star. As the star plunges to smaller radius at 1000 to 6000 km/s, a strong bow shock forms where the stellar wind is impacted by the hot X-ray emitting gas in the vicinity of Sgr A*. For a stellar mass loss rate of 4e-8 solar masses per yr and wind velocity 100 km/s, the bow...Go to contribution page
-
Alessandro Ballone (MPE / LMU)18/03/2013, 14:30TalkSome authors have suggested and studied the possibility of the gas and dust cloud G2 observed in the Galactic Center (Gillessen et al., 2012; 2013) being the outflow from a low luminosity star embedded in it (Gillessen et al., 2012; Burkert et al., 2012; Murray-Clay \& Loeb, 2012; Miralda-Escud\'e, 2012; Meyer \& Meyer-Hofmeister, 2012, Scoville, 2013). With the help of 2D hydrodynamical...Go to contribution page
-
Jorge Cuadra (Universidad Católica de Chile)18/03/2013, 14:55TalkThe infalling cloud G2 is in a Keplerian orbit with apocentre in a region populated by Wolf-Rayet stars. As such, its origin is likely associated with the mass lost by these stars. We present numerical simulations of the gas dynamics in the inner parsec of the Galaxy, including the stars that produce copious amounts of stellar winds, and the gravitational potential of SgrA*. As expected,...Go to contribution page
-
Mark Morris (University of California, Los Angeles)18/03/2013, 15:50Highlight