The orbital structure of the massive elliptical galaxy NGC 5846

P. Das; O. Gerhard; L. Coccato; E. Churazov; W. Forman; A. Finoguenov; H. Bohringer; M. Arnaboli; M. Capaccioli; A. Cortesi; F. de Lorenzi; N. G. Douglas; K. C. Freeman; K. Kuijken; M. R. Merrifield; N. R. Napolitano; E. Noordermeer; A. J. Romanowsky

doi:10.1002/asna.200811052

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The orbital structure of the massive elliptical galaxy NGC 5846

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The orbital structure of the massive elliptical galaxy NGC 5846

P. Das, O. Gerhard, L. Coccato, E. Churazov, W. Forman, A. Finoguenov, H. Bohringer, M. Arnaboli, M. Capaccioli, A. Cortesi, …

Astronomische Nachrichten, Vol.329(9-10), pp.940-943

01/12/2008

DOI: https://doi.org/10.1002/asna.200811052

Abstract

Astronomy & Astrophysics

Physical Sciences

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We use density and temperature profiles obtained from XMM-Newton observations to derive a potential of NGC 5846 out to 11 R(e), 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 surface-brightness 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 0.7R(e) with beta similar to 0.75. (C) 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

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Title: The orbital structure of the massive elliptical galaxy NGC 5846
Creators: P. Das - Max
O. Gerhard - Max Planck Institute for Extraterrestrial Physics
L. Coccato - Max Planck Institute for Extraterrestrial Physics
E. Churazov - Max Planck Institute for Astrophysics
W. Forman - Center for Astrophysics Harvard & Smithsonian
A. Finoguenov - Max Planck Institute for Extraterrestrial Physics
H. Bohringer - Max Planck Institute for Extraterrestrial Physics
M. Arnaboli - European So Observ, D-85748 Garching, Germany
M. Capaccioli - University of Naples Federico II
A. Cortesi - University of Nottingham
F. de Lorenzi - Max Planck Institute for Extraterrestrial Physics
N. G. Douglas - University of Groningen
K. C. Freeman - Supreme Council Of Health
K. Kuijken - Leiden University
M. R. Merrifield - University of Nottingham
N. R. Napolitano - Astronomical Observatory of Capodimonte
E. Noordermeer - University of Nottingham
A. J. Romanowsky - University of California, Santa Cruz
Publication Details: Astronomische Nachrichten, Vol.329(9-10), pp.940-943
Publisher: Wiley
Number of pages: 4
Date published: 01/12/2008
Grant note: ST/F00298X/1; PP/C504686/1 / STFC; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC) DFG; German Research Foundation (DFG) ST/F00298X/1; PP/C504686/1 / Science and Technology Facilities Council; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC)
Identifiers: 99783242702346
Academic Unit: School of Maths and Physics
Language: English
Resource Type: Journal article

The orbital structure of the massive elliptical galaxy NGC 5846

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