NOAO >   Observing Info >   Approved Programs >   2012B-0301

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Proposal Information for 2012B-0301


PI: Andrea Kunder, Cerro Tololo Inter-American Observatory, akunder@ctio.noao.edu
Address: Casilla 603, La Serena, Chile

CoI: R. Michael Rich, UCLA
CoI: Roberto De Propris, Cerro Tololo Inter-American Observatory
CoI: Andreas Koch, University of Heidelberg
CoI: Christian I Johnson, cijohnson@astro.ucla.edu

Title: Search for Stellar Sub-Structure in the Galactic Bulge

Abstract: We propose to acquire spectra of ~350 M giants in two Galactic bulge fields that show evidence for candidate cold stream features. Our fields are selected from the \it Bulge Radial Velocity Assay (BRAVA) and show clear departures from normality in their stellar velocity distribution. The number of stars observed by \sl BRAVA in each field (~100) is insufficient to allow a concrete detection of substructure, and we require subsequent observations to increase our sample size. Of the 87 \sl BRAVA fields that cover the southern Galactic bulge, only these two fields show signs of deviations from a normal distribution in velocity space. Therefore both confirming or refuting the presence of a stream in these fields will place limits on the detection of cold streams from fossil infall events in the \sl BRAVA database.


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NOAO >   Observing Info >   Approved Programs >   2012B-0301

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