Constraining X-ray Absorption in Emergent BAL Quasars

Quasar outflows are important for their feedback on galaxy evolution and blackhole growth. These outflows are observed as broad UV absorption lines (BALs) inquasars, reaching velocities >0.1c. In radiative acceleration models,UVabsorbing gas must be shielded by Xray absorbing gas to reach suchvelocities and, typically, BAL quasars are indeed Xrayweaker than nonBALquasars. However, recent observations are shaking our understanding on how theXray and UV absorbers are connected. We propose to reobserve with XMMNewtonthree zvirgul2 quasars that did not display UV absorption at the time of the firstXMMNewton observations, but that have recently developed new BAL troughs. Theseobservations will allow us to constrain, for the first time, the Xray/UV connection on newly emerged BALs. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]