Publications (1)1.01 Total impact
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Article: The orbital structure of the massive elliptical galaxy NGC 5846
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ABSTRACT: We use density and temperature profiles obtained from XMM-Newton observations to derive a potential of NGC 5846 out to 11Re, thus probing the mass distribution deep into the halo. The inferred circular velocity is significantly higher than the extrapolation of dynamical models implying a halo, more massive than previously thought. Using an I -band surfacebrightness profile and a projected velocity dispersion profile consisting of long-slit kinematic measurements and planetary nebulae (PNe) velocity dispersions, we solve the Jeans equations, assuming a non-rotating spherical system. The solutions suggest a highly radially anisotropic galaxy outside 0.7Re with β ∼ 0.75. (© 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)Astronomische Nachrichten 11/2008; 329(9‐10):940 - 943. · 1.01 Impact Factor
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Institutions
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2008
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Max-Planck-Institut für extraterrestrische Physik
Garching bei München, Bavaria, Germany
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