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The X-shaped Milky Way bulge in OGLE-III* photometry and in N-body models

Nataf, David; Udalski, A; Skowron, J; Szymanski, M; Kubiak, M; Pietrzynski, G; Soszynski, I.; Ulaczyk, K; Wyrzykowski, L; Poleski, R; Athanassoula, E; Ness, M


We model the split red clump of the Galactic bulge in OGLE-III photometry, and compare the results to predictions from two N-body models. Our analysis yields precise maps of the brightness of the two red clumps, the fraction of stars in the more distant peak, and their combined surface density. We compare the observations to predictions from two N-body models previously used in the literature. Both models correctly predict several features as long as one assumes an angle αBar ≈30° between the...[Show more]

CollectionsANU Research Publications
Date published: 2015
Type: Journal article
Source: Monthly Notices of the Royal Astronomical Society
DOI: 10.1093/mnras/stu2497


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