Evidence Of A Clumpy Disc-Wind In The Star Forming Galaxy Mcg–03–58–007

We report the result of a detailed analysis from a deep simultaneous130 ks XMM-Newton & NuSTAR observation of the nearby (z = 0.0315)and bright starburst-AGN system: MCG-03-58-007. Rapid X-ray spectralvariability has been detected, which may be caused by an obscurationevent. We show that most of the observed variability may be caused by aninhomogeneous, highly ionized fast (vw,1~0.10c and vw,2~0.35c)disc-wind rather than a neutral absorber embedded in the clumpy torus.Suchdramatic and fast variability of the wind, places MCG–3–58-007among the unique objects such as the luminous quasar PDS 456, whichis considered the prototype of fast disc-wind. We also show that most ofthe scattered soft X-ray emission in MCG–03–58–007 originates formthe larger scale photoionized plasma, possibly associated with NLR gas,as seen from the presence of several narrow emission lines in the RGSspectra.