EPJ Web of Conferences 19, 02007 (2012)
https://doi.org/10.1051/epjconf/20121902007

Sub-structures in the inner halo of the Milky Way

¹ Centro de Investigaciones de Astronomía (CIDA), Mérida, Venezuela
² Astronomy Department, Yale University, New Haven, CT, USA
³ Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg, Germany
⁴ Osservatorio Astronomico di Padova INAF, Italy

^a e-mail: akvivas@cida.ve

Abstract

We present a spectroscopic study of a sample of 238 RR Lyrae stars, from the QUEST survey, located in the Galactic halo at distances between 4 and 20 kpc from the Sun. Combining their spatial position and kinematics we were able to identify sub-structures in this part of the halo. Some of those sub-structures may be associated with known halo features like the Virgo Overdensity, the Hercules-Aquila Cloud, and the Anticenter Stream.