Mapping the Galactic Halo. VIII. Quantifying Substructure
Starkenburg, Else; Helmi, Amina; Morrison, Heather; Harding, Paul; van Woerden, Hugo; Mateo, Mario; Olszewski, Edward W; Sivarani, T; Norris, John; Freeman, Kenneth; Shectman, Stephen; Dohm-Palmer, Robbie C; Frey, Lucy
We have measured the amount of kinematic substructure in the Galactic halo using the final data set from the Spaghetti project, a pencil-beam high-latitude sky survey. Our sample contains 101 photometrically selected and spectroscopically confirmed giants with accurate distance, radial velocity, and metallicity information. We have developed a new clustering estimator: the "4distance" measure, which when applied to our data set leads to the identification of one group and seven pairs of clumped...[Show more]
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|01_Starkenburg_Mapping_the_Galactic_Halo._2009.pdf||385.42 kB||Adobe PDF||Request a copy|
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