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We present Hubble Space Telescope (HST) ultraviolet Fe I and Fe II images ofthe remnant of Supernova 1885 (S And) which is observed in absorption againstthe bulge of the Andromeda galaxy, M31. We compare these Fe I and Fe IIabsorption line images to previous HST absorption images of S And, of which thehighest quality and theoretically cleanest is Ca II H & K. Because the remnantis still in free expansion, these images provide a 2D look at the distributionof iron synthesized in this probable Type Ia explosion, thus providing insightsand constraints for theoretical SN Ia models. The Fe I images show extendedabsorption offset to the east from the remnant's center as defined by Ca IIimages and is likely an ionization effect due to self-shielding. Moresignificant is the remnant's apparent Fe II distribution which consists of fourstreams or plumes of Fe-rich material seen in absorption that extend fromremnant center out to about 10,000 km/s. This is in contrast to the remnant'sCa II absorption, which is concentrated in a clumpy, roughly spherical shell at1000 to 5000 km/s but which extends out to 12,500 km/s. The observeddistributions of Ca and Fe rich ejecta in the SN 1885 remnant are consistentwith delayed detonation white dwarf models. The largely spherical symmetry ofthe Ca-rich layer argues against a highly anisotropic explosion as might resultfrom a violent merger of two white dwarfs.

The 2D Distribution of Iron Rich Ejecta in the Remnant of SN 1885 in M31