Spectro-astrometry with Photonic Lanterns

New frontiers of astronomical science push the imaging capabilities of modern adaptive optics (AO)-equipped telescopes.  Examples included studies of planet formation through high-contrast imaging studies of exoplanets and circumstellar disks, and studies of accretion and outflows in circumstellar environments.  However, precision measurement at the diffraction limit is made challenging by time-varying residual aberrations in AO-corrected wavefronts.  Photonic lanterns are a novel technology with the potential to enable new capabilities in precision measurement at the diffraction limit through the exploitation of their novel spatial filtering and coherence properties. We present the potential sensitivity of photonic-lantern spectrometers for determining two-dimensional spectroastrometric signals for emission-line sources as a function of AO residual wavefront error.