Feeding the Milky Way: Properties of the Leading Arm of the Magellanic Stream

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The Leading Arm is a tidally formed gaseous structure spearheading the Magellanic Cloud galaxies on their trajectory through the Milky Way's halo. Its morphology shows evidence of interaction with the disk. Thus, this gas stream presents a first-hand opportunity to study direct fueling of our Galaxy with star-forming material. Using HST/COS spectra of two QSO targets and WHAM H-alpha detections, we determine the structure's metallicity and distance in two locations with confirmed HI 21-cm emission and therefore place constraints on its origin and formation.

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