With the large effective area at high energies ( ~ 5-10 keV) provided by XMM-Newton, came the discovery of absorption features above 7 keV. These features were attributed to highly ionized Fe XXV and XXVI that are outflowing from the inner regions. The blueshifts indicate the material is moving at mildly relativistic velocities of about 104-105 km/s and have been coined ultra-fast outflows (UFOs). If confirmed, UFOs would correspond to the hottest, densest, and fastest gas expelled from the black hole system and dispelled on the host galaxy. With the large effective area at high energies ( ~ 5-10 keV) provided by XMM-Newton, came the discovery of absorption features above 7 keV. These features were attributed to highly ionized Fe XXV and XXVI that are outflowing from the inner regions. The blueshifts indicate the material is moving at mildly relativistic velocities of about 104-105 km/s and have been coined ultra-fast outflows (UFOs). If confirmed, UFOs would correspond to the hottest, densest, and fastest gas expelled from the black hole system and dispelled on the host galaxy.
Determining the nature of UFOs may be the key to understanding how galaxies grow and evolve. However, the modest spectral resolution of current instruments means little is known about the wind. The high spectral resolution and throughput of Colibrì will reveal the composition of the wind and the launching mechanism.