We present the analysis of two outflows ( S1 at –5500 km s ^ { -1 } and S2 at –9700 km s ^ { -1 } ) seen in recent HST/COS observations of quasar SDSS J0755+2306 ( z = 0.854 ) .
The outflows are detected as absorption troughs from both high-ionization species , including N iii , O iii , and S iv , and very high-ionization species , including Ar viii , Ne viii , and Na ix .
The derived photoionization solutions show that each outflow requires a two ionization-phase solution .
For S1 , troughs from S iv * and S iv allow us to derive an electron number density , n _ { \mathrm { \scriptstyle e } } = 1.8 \times 10 ^ { 4 } cm ^ { -3 } , and its distance from the central source of R = 270 pc .
For S2 , troughs from O iii * and O iii yield n _ { \mathrm { \scriptstyle e } } = 1.2 \times 10 ^ { 3 } cm ^ { -3 } and R = 1600 pc .
The kinetic luminosity of S2 is > 12 % of the Eddington luminosity for the quasar and therefore can provide strong AGN feedback effects .
Comparison of absorption troughs from O iii and O vi in both outflow systems supports the idea that for a given element , higher ionization ions have larger covering fractions than lower ionization ones .