Workshop: Gas Dynamics and Star Formation in the Extreme Environment of Galactic Nuclei, Ringberg

Session

Approaching the event horizon

22 Mar 2013, 09:25

Ringberg

Conveners

Approaching the event horizon

• Martin Krause (MPE)

Approaching the event horizon

• Martin Krause (MPE)

43. Towards imaging the horizon in the Galactic Centre (R)

Heino Falcke (Radboud University Nijmegen & ASTRON)

22/03/2013, 09:25

Review

Black holes are supposed to power the nuclei of galaxies. The best place to test this paradigm is the Galactic center. Here a compact radio source, Sgr A*, with a mass of 4 Million solar masses marks the very center of our Galaxy. Numerical magnetohydrodynamic simulations and semi-analytic models seem to converge towards a combined jet-disk model producing radiation from radio to X-rays to...

44. Infrared Interferometry of the Galactic Center Black Hole with GRAVITY (R)

Frank Eisenhauer (MPE)

22/03/2013, 10:40

Review

GRAVITY is a new instrument to combine the four 8m ESO Very Large Telescopes in Chile. Providing precision astrometry of order 10 microarcseconds and infrared imaging with 4-milliarcsecond resolution, GRAVITY will address a number of fundamental open questions on the Galactic Center black hole and its surrounding: What is the nature of its flares? What is the spin of the black hole? How can we...

45. Astronomical tests of GR and the pseudocomplex field theory with X-ray and NIR spectroscopy

Thomas Boller (MPE)

22/03/2013, 11:25

Talk

Gravitation is very well des- cribed by Einstein's General Relativity. However, several theoretical predictions like the existence of curvature singularities and event horizons are under debate. We contrast predictions made by General Relativity with the pseudo–complex field theory proposed recently. Among them we study the gravitational redshift effect, perihelion shift, orbital motion,...