The orbital structure of the massive elliptical galaxy NGC 5846

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

doi:10.1002/asna.200811052

The orbital structure of the massive elliptical galaxy NGC 5846

P. Das^*, O. Gerhard, L. Coccato, E. Churazov, W. Forman, A. Finoguenov, H. Böhringer, M. Arnaboldi, M. Capaccioli, A. Cortesi, F. De Lorenz, N. G. Douglas, K. C. Freeman, K. Kuijken, M. R. Merrifield, N. R. Napolitano, E. Noordermeer, A. J. Romanowsky

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

We use density and temperature profiles obtained from XMM-Newton observations to derive a potential of NGC 5846 out to 11R_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 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 0.7R_e with β ∼ 0.75.

Original language	English
Pages (from-to)	940-943
Number of pages	4
Journal	Astronomische Nachrichten
Volume	329
Issue number	9-10
DOIs	https://doi.org/10.1002/asna.200811052
Publication status	Published - Dec 2008

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Das, P., Gerhard, O., Coccato, L., Churazov, E., Forman, W., Finoguenov, A., Böhringer, H., Arnaboldi, M., Capaccioli, M., Cortesi, A., De Lorenz, F., Douglas, N. G., Freeman, K. C., Kuijken, K., Merrifield, M. R., Napolitano, N. R., Noordermeer, E., & Romanowsky, A. J. (2008). The orbital structure of the massive elliptical galaxy NGC 5846. Astronomische Nachrichten, 329(9-10), 940-943. https://doi.org/10.1002/asna.200811052

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title = "The orbital structure of the massive elliptical galaxy NGC 5846",

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.",

keywords = "Celestial mechanics, Dark matter, Galaxies: elliptical and lenticular, Galaxies: halos, Galaxies: individual (NGC 5846), Planetary nebulae: general, Stellar dynamics, X-rays: galaxies, cd",

author = "P. Das and O. Gerhard and L. Coccato and E. Churazov and W. Forman and A. Finoguenov and H. B{\"o}hringer and M. Arnaboldi and M. Capaccioli and A. Cortesi and {De Lorenz}, F. and Douglas, {N. G.} and Freeman, {K. C.} and K. Kuijken and Merrifield, {M. R.} and Napolitano, {N. R.} and E. Noordermeer and Romanowsky, {A. J.}",

year = "2008",

month = dec,

doi = "10.1002/asna.200811052",

language = "English",

volume = "329",

pages = "940--943",

journal = "Astronomische Nachrichten",

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Das, P, Gerhard, O, Coccato, L, Churazov, E, Forman, W, Finoguenov, A, Böhringer, H, Arnaboldi, M, Capaccioli, M, Cortesi, A, De Lorenz, F, Douglas, NG, Freeman, KC, Kuijken, K, Merrifield, MR, Napolitano, NR, Noordermeer, E & Romanowsky, AJ 2008, 'The orbital structure of the massive elliptical galaxy NGC 5846', Astronomische Nachrichten, vol. 329, no. 9-10, pp. 940-943. https://doi.org/10.1002/asna.200811052

TY - JOUR

T1 - The orbital structure of the massive elliptical galaxy NGC 5846

AU - Das, P.

AU - Gerhard, O.

AU - Coccato, L.

AU - Churazov, E.

AU - Forman, W.

AU - Finoguenov, A.

AU - Böhringer, H.

AU - Arnaboldi, M.

AU - Capaccioli, M.

AU - Cortesi, A.

AU - De Lorenz, F.

AU - Douglas, N. G.

AU - Freeman, K. C.

AU - Kuijken, K.

AU - Merrifield, M. R.

AU - Napolitano, N. R.

AU - Noordermeer, E.

AU - Romanowsky, A. J.

PY - 2008/12

Y1 - 2008/12

N2 - 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.

AB - 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.

KW - Celestial mechanics

KW - Dark matter

KW - Galaxies: elliptical and lenticular

KW - Galaxies: halos

KW - Galaxies: individual (NGC 5846)

KW - Planetary nebulae: general

KW - Stellar dynamics

KW - X-rays: galaxies

KW - cd

UR - http://www.scopus.com/inward/record.url?scp=57149138882&partnerID=8YFLogxK

U2 - 10.1002/asna.200811052

DO - 10.1002/asna.200811052

M3 - Article

SN - 0004-6337

VL - 329

SP - 940

EP - 943

JO - Astronomische Nachrichten

JF - Astronomische Nachrichten

IS - 9-10

ER -

The orbital structure of the massive elliptical galaxy NGC 5846

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