A spectral stacking analysis to search for faint outflow signatures in z~6 quasars

Understand

Outflows in quasars during the early epochs of galaxy evolution are an important part of the feedback mechanisms potentially affecting the evolution of the host galaxy.

• However, systematic observations of outflows are only now becoming possible with the advent of sensitive mm telescopes.
• In this study we use spectral stacking methods to search for faint high velocity outflow signal in a sample of [C II] detected, z ~ 6 quasars.
• We search for broad emission line signatures from high-velocity outflows for a sample of 26 z ~ 6 quasars observed with ALMA, with a detection of the [C II] line.