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We discuss the emerging trend that super-Chandrasekhar Type Ia Supernovae(SCSNe) with progenitor mass estimates significantly exceeding 1.4 M_sun tendto explode in metal-poor environments. While Taubenberger et al. 2011 notedthat some of the SCSNe host galaxies are relatively metal-poor, we focusquantitatively on their locations in the hosts to point out that in three outof four cases, the SCSNe explosions occurred in the outer edge of the disks oftheir hosts. It is therefore very likely that their progenitors had far lowermetallicities than those implied by the metallicity of their hosts' centralregions. In two cases (SN 2003fg and SN 2009dc) the explosion sites wereoutside 99% of the host's light, and in one case (SN 2006gz) the host's radialmetallicity slope indicates that the explosion site is in a metal-poor region.The fourth case (SN 2007if) has the lowest spectroscopically measured SN Iahost metallicity (Childress et al. 2011. It may be possible to explain each ofthese unusually bright events through some progenitor scenario specific to thatcase, but a much simpler and straightforward conclusion would be to ascribe thecontrolling factor to the only physical aspect they have in common --- metalpoor environments.

Super-Chandrasekhar SNe Ia Strongly Prefer Metal-Poor Environments