Title: Seyfert''s Sextet: Timing the Disruption of  Galaxies and the Formation of the Intragroup 
Medium

Abstract:
We''ve  explored the effects of mergers on galaxy evolution and  the formation of the intragroup 
medium  (IGM) in  the Seyfert''s Sextet (SS, HCG 79).  For this aim,  we have used integral field 
spectroscopy (IFS)  data  from the Calar Alto Legacy Integral field Area (CALIFA) survey and 
HST archival imaging. We have studied the stellar population and  ionized gas distribution  in 
galaxies  H79a, H79b (NGC 6027), H79c, and H79f searching for constraints for their star 
formation histories (SFH). Comparing the SFHs  allows us to reject the hypothesis  that  H79f is 
a tidal tail from galaxy H79b; instead, we suggest that H79f is a disrupted galaxy that has   
experienced a disrupting  encounter with galaxy  H79c, followed by a less disrupting one with  
galaxy H79b.  Those encounters, happened  within a time scale of ~1.5 Gyr. In the disrupted 
galaxy and in a lesser manner in galaxy H79c,  gas has been depleted and dust has been  
destroyed, while  a large fraction of their stars have been  incorporated to the IGM. The  ionized 
gas  in H79b is contrarotating with respect to the stellar disk, this supports the presence of 
multiplemegers.  To complement our IFU observations, we have estimated star formation rates, 
and revise  dust extinction, using  archival infrared data.  The processes taking place in SS 
might  provide a    plausible mechanism for the generation  of intra-halo light, a likely major 
source of photons in the cosmos (Zemcov, M., Smidt, J., Arai, T., et al.\ 2014, Science, 346, 
732)