RR Lyrae in Sagittarius Dwarf Globular Clusters (Poster abstract)

Volume 44 number 2 (2016)

Barton J. Pritzl

University of Wisconsin Oshkosh, Department of Physics and Astronomy, 800 Algoma Boulevard, Oshkosh, WI 54901; pritzlb@uwosh.edu

Thomas J. Gehrman

University of Wisconsin Oshkosh, Department of Physics and Astronomy, 800 Algoma Boulevard, Oshkosh, WI 54901

Ellyn Bell

University of Wisconsin Oshkosh, Department of Physics and Astronomy, 800 Algoma Boulevard, Oshkosh, WI 54901

Ricardo Salinas

University of Wisconsin Oshkosh, Department of Physics and Astronomy, 800 Algoma Boulevard, Oshkosh, WI 54901

Horace A. Smith

University of Wisconsin Oshkosh, Department of Physics and Astronomy, 800 Algoma Boulevard, Oshkosh, WI 54901

Maircio Catelan

University of Wisconsin Oshkosh, Department of Physics and Astronomy, 800 Algoma Boulevard, Oshkosh, WI 54901

Abstract

(Abstract only) The Milky Way Galaxy was built up in part by the cannibalization of smaller dwarf galaxies. Some of them likely contained globular clusters. The Sagittarius dwarf galaxy provides a unique opportunity to study a system of globular clusters that originated outside the Milky Way. We have investigated the RR Lyrae populations in two Sagittarius globular clusters, Arp 2 and Terzan 8. The RR Lyrae are used to study the properties of the clusters and to compare this system to Milky Way globular clusters. We will discuss whether or not dwarf galaxies similar to the Sagittarius dwarf galaxy could have played a role in the formation of the Milky Way Galaxy.