Stellar over-densities in the outer halo of the milky way
This study presents a tomographic survey of a subset of the outer halo (1040 kpc) drawn from the Sloan Digital Sky Survey Data Release 6. Halo substructure on spatial scales of >3 degrees is revealed as an excess in the local density of sub-giant stars. With an appropriate assumption of a model stellar isochrone it is possible for us to then derive distances to the sub-giant population. We describe three new candidate halo substructures; the 160- and 180-degree over-densities (at distances of...[Show more]
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|Source:||Publications of the Astronomical Society of Australia|
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