APT2 - Supermassive Black Holes |
Speaker_ |
Gillessen, Stefan |
Co-autors |
Shay Zucker, Tal Alexander, Frank Eisenhauer, Reinhard Genzel |
Talk _ |
Probing Post-Newtonian Gravity near the Galactic Black Hole with Stellar Doppler Measurements |
Abstract _ |
Stars closely approaching the massive black hole in the center of the Galaxy provide a unique opportunity to probe post-Newtonian physics in a yet unexplored regime of celestial mechanics. Recent advances in infrared stellar spectroscopy allow the precise measurement of stellar Doppler shift curves and thereby the detection of beta-squared post-Newtonian effects (gravitational redshift in the black hole's potential and the transverse Doppler shift). The data at hand now will allow to search for these effects within a decade. I will present the simulations we have performed as well as the recent data which the MPE group is gathering now routinely. |