Felix Bosco (Germany)
bosco @ mpia.de
We will utilize the adaptive optics (AO) simulations to explore the feasibility of software-based improvements on existing AO systems and interferometers, like speckle holography or the piston roconstruction experiment (P-REx). The first one improves the combination of short-exposure-time images by replacing a simple shift-and-add algorithm by a more sophisticated algorithm, on ground-layer AO corrected data. As part of P-REx, we will analyze the possibility of reconstructing the atmospheric piston over a single telescopes being part of an interferometer which is fed to a fringe tracker for phase stabilization of the interferometric observation. This would be useful for enabling longer integration times of fringe trackers working on the low signal to noise ratio (SNR) limit.
In a second project, we will estimate the extent of broad emission line regions (BLRs) in active galactic nuclei (AGNs) which is a means to estimate the mass of central super-massive black holes (SMBHs) of galaxies. This quantity is usually estimated using the method of reverberation mapping which is, however, restricted to low-luminosity AGNs which are required to be spatially resolved, i.e. this technique is restricted to AGNs at low redshift (z < 2.5). These limits are in theory overcome by the method of spectroastrometry what we will be testing on VLT/SINFONI data.
Supervisor: Joerg-Uwe Pott (MPIA)