Abstract
| Cuellar |
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| High ionization clouds in Proximate molecular quasar absorbers |
| Proximate molecular quasar absorbers (PH2 ) are an intriguing population of absorption systems that was recently uncovered through strong H2 absorption at a small velocity separation from the background quasars. In Noterdaeme et al 2023, we study the overall chemical enrichment measured from the HI, H2 , metal lines and the neutral gas kinematics with respect to the quasar host. We found that high-metallicity neutral and molecular gas is more likely to be located in outflows, while low-metallicity gas could be more clustered in velocity space around the quasar host, possibly with an infalling component. To further increase knowledge of these systems and better understand feedback mechanisms, we study the high ionization lines (SiIV, CIV, NV, OVI). NV is only present in proximate systems (Perrotta et al 2018), so it is a good tool for identifying gas that is physically related to the quasar host. NV absorption is clearly seen at the quasar redshift for 9 out of our 13 proximate H2 absorbers. Using cloudy (v17.00; Ferland et al. 2017) we model each system. We find information about the distances for the high ionization clouds to the quasar host and the relative abundance of the ions for the proximate systems. These new results are the ones we will present in the conference. |