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We present a detailed analysis of the Astrophysical Research Consortium 3.5 mtelescope spectrum of QSO SDSS J0838+2955. The object shows three broadabsorption line (BAL) systems at 22,000, 13,000, and 4900 km s^-1 blueshiftedfrom the systemic redshift of z=2.043. Of particular interest is the lowestvelocity system that displays absorption from low-ionization species such as MgII, Al II, Si II, Si II*, Fe II and Fe II*. Accurate column densities weremeasured for all transitions in this lowest velocity BAL using an inhomogeneousabsorber model. The ratio of column densities of Si II* and Fe II* with respectto their ground states gave an electron number density of log n_e (cm^-3) =3.75 +/- 0.22 for the outflow. Photoionization modeling with careful regards tochemical abundances and the incident spectral energy distribution predicts anionization parameter of log U_H = -1.93 +/- 0.21 and a hydrogen column densityof log N_H (cm^-2) = 20.80 +/- 0.28. This places the outflow at 3.3+1.5-1.0 kpcfrom the central AGN. Assuming that the fraction of solid angle subtended bythe outflow is 0.2, these values yield a kinetic luminosity of (4.5+3.1-1.8) x10^45 erg s^-1, which is (1.4+1.1-0.6)% the bolometric luminosity of the QSOitself. Such large kinetic luminosity suggests that QSO outflows are a majorcontributor to AGN feedback mechanisms.

Quasar Outflow Contribution to AGN Feedback: Observations of QSO SDSS J0838+2955