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Discovery and characterization of substructures in TGAS and RAVE

Virginiflosia, T (2017) Discovery and characterization of substructures in TGAS and RAVE. Master's Thesis / Essay, Astronomy.

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We exploit the powerful combination of astrometric data from Gaia and radial velocity data from RAVE to find substructures in the solar neighborhood, using a friends-of-friends algorithm in six phase space dimensions. We show that this algorithm is successful in recovering the known substructures, as well as finding new substructures. A significance test reveals that the newly discovered substructures are not likely to be found by chance. Their physical sizes and the velocity dispersions are typically larger than Galactic open clusters, yet visual analyses of the color magnitude diagrams reveals the stars are likely to have the same age and origin. We conclude that some of these substructures are candidates of dissolving open clusters.

Item Type: Thesis (Master's Thesis / Essay)
Degree programme: Astronomy
Thesis type: Master's Thesis / Essay
Language: English
Date Deposited: 15 Feb 2018 08:34
Last Modified: 15 Feb 2018 08:34

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