We present a detailed study of the ionised environment of the Seyfert 1 galaxy Mrk 704 using medium and high resolution X-ray spectra obtained with a long XMM-Newton observation .
The 0.3 - 10 { keV } continuum , well described by a power-law ( \Gamma \approx 1.86 ) and two blackbodies ( kT \approx 0.085 and 0.22 { keV } ) , is found to be affected by a neutral partial covering absorption ( N _ { H } \approx 10 ^ { 23 } { cm ^ { -2 } } , covering fraction \approx 0.22 ) and two warm absorber components .
We identify a low ionisation , \xi \sim 20 erg cm s ^ { -1 } , and high outflow velocity , v \sim 1350 { km s ^ { -1 } } , phase producing the O vi and Fe M-shell unresolved-transition array ( UTA ) .
An additional high ionisation warm absorbing phase with \xi \sim 500 erg cm s ^ { -1 } and low outflow velocity , v \sim 540 { km s ^ { -1 } } , gives rise to absorption features due to O vii , O viii , N vi , N vii and C vi .
We also detected weak emission lines of He-like triplets from O vii and N vi ions , thus making Mrk 704 a Seyfert 1 galaxy with both warm absorption and emission .
The emission lines are well described by two warm emitting , photoionised media with different densities but comparable \xi , suggesting discrete clouds of warm emission .
The high density phase ( n _ { e } \sim 10 ^ { 13 } { { cm ^ { -3 } } } ) responsible for the resonance lines appears to outflow at high velocity \sim 5000 { km s ^ { -1 } } .
The low velocity , low density phase is likely similar to the X-ray line emitting regions found in Seyfert 2 galaxies .
The physical conditions of warm emitters and warm absorbers suggest that these clouds are similar but observed in absorption along our line of sight and in emission at other lines of sight .
The unique line of sight passing close to the torus opening angle is likely responsible for the neutral partial covering absorption and our view of emission lines due to the suppressed continuum in this polar scattered Seyfert 1 galaxy .