Detection of a Multi-Phase Ultra-Fast Wind in the Narrow-Line Seyfert 1
  Galaxy Mrk 1044
  We present a detailed analysis of XMM-Newton X-ray spectra of the Narrow-Line
Seyfert 1 galaxy Mrk 1044. We find robust evidence for a multi-phase,
ultra-fast outflow, traced by four separate components in the grating spectrum.
One component has high column density and ionization state, and is outflowing
at 0.15c. The other three wind components have lower temperature, lower column
density, and have outflow velocities 0.08c. This wind structure is strikingly
similar to that found in IRAS 17020+4544, suggesting that stratified winds may
be a common feature of ultra-fast outflows. Such structure is likely produced
by fluid instabilities that form when the nuclear wind shocks the ambient
medium. We show that in an energy-driven wind scenario, the wind in Mrk 1044
might carry enough energy to produce significant feedback on its host galaxy.
We further discuss the implications of the presence of a fast wind in yet
another NLS1 galaxy with high Eddington ratio.
