We report on results of imaging and spectral analysis of the supernova remnant ( SNR ) RCW 86 observed with Suzaku .
The SNR is known to exhibit K-shell emission of low ionized Fe , possibly originating from supernova ejecta .
We revealed the global distribution of the Fe-rich plasma in the entire remnant , for the first time ; the Fe-K emission was clearly detected from the west , north , and south regions , in addition to the X-ray brighter shells of southwest and northeast , where the presence of the Fe-rich ejecta has already been reported .
The spectrum of each region is well represented by a three-component model consisting of low- and high-temperature thermal plasmas and a non-thermal emission .
The lower-temperature component , with elemental abundances of near the solar values , likely originates from the forward shocked interstellar medium , while the Fe-rich ejecta is described by the hotter plasma .
From the morphologies of the forward and reverse shocks in the west region , the total ejecta mass is estimated to be 1–2 M _ { \odot } for the typical explosion energy of \sim 1 \times 10 ^ { 51 } erg .
The integrated flux of the Fe-K emission from the entire SNR roughly corresponds to a total Fe mass of about 1 M _ { \odot } .
Both of these estimates suggest a Type Ia supernova origin of this SNR .
We also find possible evidence of an Fe-rich clump located beyond the forward-shock front in the north rim , which is reminiscent of ejecta knots observed in the Tycho and Vela SNRs .