GEMINI 3 D spectroscopy of BAL + IR + Fe II QSOs : II .

From a study of BAL + IR + Fe ii QSOs (using deep Gemini GMOS-IFU spectroscopy) new results are presented: for IRAS 04505−2958. Specifically, we have studied in detail the out flow (OF) process and their associated structures, mainly at two large galactic scales: (i) two blobs at radius r ∼0.2 and 0.4 (∼1.1 and 2.2 kpc); and (ii) an external hyper giant symmetric shell at r ∼2.0 (11 kpc). In addition, the presence of a very extended hyper giant shells at r ∼ 15 (∼80 kpc) is discussed. From this study the following main results were obtained: (i) In general the GMOS data show strong emission lines, in almost all the observed GMOS field: 3.5× 5.0 (∼ 20 × 30 kpc). Furthermore, multiple emission line systems were detected, in the regions of the shells (which are aligned at PA ∼ 131: i.e. suggesting that part of the OF process is in the blow-out phase with bipolar structure). These shells also show emission lines ratios consistent with an extreme outflow process with the associated shocks, plus starbursts. (ii) For the two more internal blobs (at r ∼ 1 and 2 kpc) the GMOS data show that these structures are symmetric shells in expansion, with very similar properties to those detected recently in the super shells of Mrk 231. (iii) A strong blue continuum component was observed in all the observed GMOS field (including the 3 shells). (iv) For the external hyper giant shell at r = 2.0 (11 kpc) the kinematics GMOS maps of the ionized gas ([O ii], [Ne iii], [O iii], Hβ) show very similar features to those of the prototype of exploding external hyper shell: in NGC 5514. Furthermore, in the knots of the shells S3 the stellar population and the the [S ii]/Hα, [O i]/Hα, [N ii]/Hα and [O iii]/Hβ ELR show all typical feature of of starburst, poststarburst plus OF/shocks. Using the optical GMOS and HST data we have confirmed that the more probable source of ultra-luminous IR energy is the QSO. The nature of the extreme OF process in IRAS 04505−2958, with very large scale super/hyper shells (from 1 to ∼100 kpc) is discussed. In addition, using the new GMOS data, the 4 main scenarios –proposed for this IRAS QSO– are analysed and compared (an interaction of galaxies, a composite hyper wind, a naked QSO and an ejected QSO). The new GMOS data show a good agreement with an extreme + explosive OF scenario: where part of the ISM of the host galaxy was ejected in the form of multiple shells. This extreme OF process could be also associated with 2 main processes or steps in the evolution of QSOs and their host galaxies. Specifically: (i) the formation of young/satellite galaxies by giant explosions; and (ii) to define the final mass of the host galaxy, and even if the explosive nuclear outflow is extremely energetic, this process could disrupt an important fraction (or even all) of the host galaxy. Finally, the presence of cosmic rays and neutrino/dark–matter in BAL + IR + Fe ii QSO (associated with HyN) is discussed.