0 Assigned ID: 2131 ----- Attempting Submission 1 (Fri Apr 09 19:11:58 GMT 2021) ----- There has been major progress recently in the study of quasar absorption outflows and their potential contribution for AGN feedback. HST spectral observations of the 500A-1050A rest-frame (hereafter, EUV500) in medium redshift objects (z~1) uncovered a rich phenomenology of absorption troughs. The quality and quantity of EUV500 diagnostic troughs allow us to probe the very high ionization phase, which carries 90% or more of the outflowing material, as well as determine the distance of most outflows from the central source (R). The first objective is impossible to achieve with the thousands of available ground-based spectra, and R can be measured in only ~1% of them. The EUV500 effort yielded the most energetic outflows measured to date with enough kinetic luminosity to be major agents of AGN feedback processes. The HST spectral UV archive includes observations of more than 800 quasars. These observations were taken for studying intervening absorption systems, and quasar outflows detected in these spectra were rarely analyzed. WE PROPOSE an archive program to study the EUV500 outflows found in these spectra. Based on previous studies, we expect to find 20-30 very high ionization outflows (tripling the existing sample), and 10-15 outflows with measurable distance (doubling the existing sample). PI Dr. Arav published several refereed papers on analyzing COS data of quasar outflows, including on a similar quasar outflow: Arav et al. 2013 MNRAS, 436, 3286 Quasar outflows and AGN feedback in the extreme UV: HST/COS observations of HE 0238-1904 The Co-I team has substantial expertise in both the data and science of this proposal. Dr Jerry Kriss: An expert on COS data and in the analysis of AGN outflows based on COS data. Dr. Korista is an AGN expert, with several publications on quasar and Seyfert outflows involving HST UV spectral observations. Dr Xinfeng Xu: who published 3 papers analyzing COS data of quasar outflows Supermassive Black Holes and Active Galaxies 0 Regular false false true false false SUPPORTED