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Dearth of dark matter or massive dark halo? Mass-shape-anisotropy degeneracies revealed by NMAGIC dynamical models of the elliptical galaxy NGC 3379

De Lorenzi, F; Gerhard, Ortwin; Coccato, L; Arnaboldi, Magda; Capaccioli, Massimo; Douglas, Nigel G; Freeman, Kenneth; Kuijken, Konrad; Merrifield, M R; Napolitano, N. R.; Noordermeer, E; Romanowsky, A. J.; Debattista, Victor. P; Debattista, Victor P.


Recent results from the Planetary Nebula Spectrograph (PNS) survey have revealed a rapidly falling velocity dispersion profile in the nearby elliptical galaxy NGC 3379, casting doubts on whether this intermediate-luminosity galaxy has the kind of dark matter (DM) halo expected in Λ cold dark matter (ΛCDM) cosmology. We present a detailed dynamical study of this galaxy, combining ground based long-slit spectroscopy, integral-field data from the Spectrographic Areal Unit for Research on Optical...[Show more]

CollectionsANU Research Publications
Date published: 2009
Type: Journal article
Source: Monthly Notices of the Royal Astronomical Society
DOI: 10.1111/j.1365-2966.2009.14553.x


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