Dark matter in early-type spiral galaxies: the case of NGC 2179 and of NGC 2775

E.M. Corsini; A. Pizzella; M. Sarzi; P. Cinzano; J. Vega Beltran; J. Funes; F. Bertola; M. Persic; P. Salucci

Dark matter in early-type spiral galaxies: the case of NGC 2179 and of NGC 2775

E.M. Corsini, A. Pizzella, M. Sarzi, P. Cinzano, J. Vega Beltran, J. Funes, F. Bertola, M. Persic, P. Salucci

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Abstract

We present the stellar and ionized-gas velocity curves and velocity-dispersion profiles along the major axis for six early-type spiral galaxies. Two of these galaxies, namely NGC 2179 and NGC 2775, are particularly suited for the study of dark matter halos. Using their luminosity profiles and modeling their stellar and gaseous kinematics, we derive the mass contributions of the luminous and the dark matter to the total potential. In NGC 2179 we find that the data (measured out to about the optical radius Ropt) unambiguously require the presence of a massive dark halo. For the brighter and bigger object NGC 2775, we can rule out a significant halo contribution at radii R < 0:6Ropt. Although preliminary, these results agree with the familiar mass distribution trend known for late-type spirals of comparable mass.

Original language	English
Pages (from-to)	671-686
Journal	Astronomy and Astrophysics
Volume	342
Publication status	Published - 1999

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@article{cf330dc6c92c4e2a9df28c6db1eddaab,

title = "Dark matter in early-type spiral galaxies: the case of NGC 2179 and of NGC 2775",

abstract = "We present the stellar and ionized-gas velocity curves and velocity-dispersion profiles along the major axis for six early-type spiral galaxies. Two of these galaxies, namely NGC 2179 and NGC 2775, are particularly suited for the study of dark matter halos. Using their luminosity profiles and modeling their stellar and gaseous kinematics, we derive the mass contributions of the luminous and the dark matter to the total potential. In NGC 2179 we find that the data (measured out to about the optical radius Ropt) unambiguously require the presence of a massive dark halo. For the brighter and bigger object NGC 2775, we can rule out a significant halo contribution at radii R < 0:6Ropt. Although preliminary, these results agree with the familiar mass distribution trend known for late-type spirals of comparable mass.",

author = "E.M. Corsini and A. Pizzella and M. Sarzi and P. Cinzano and {Vega Beltran}, J. and J. Funes and F. Bertola and M. Persic and P. Salucci",

year = "1999",

language = "English",

volume = "342",

pages = "671--686",

journal = "Astronomy and Astrophysics",

issn = "1432-0746",

publisher = "EDP Sciences",

}

TY - JOUR

T1 - Dark matter in early-type spiral galaxies: the case of NGC 2179 and of NGC 2775

AU - Corsini, E.M.

AU - Pizzella, A.

AU - Sarzi, M.

AU - Cinzano, P.

AU - Vega Beltran, J.

AU - Funes, J.

AU - Bertola, F.

AU - Persic, M.

AU - Salucci, P.

PY - 1999

Y1 - 1999

N2 - We present the stellar and ionized-gas velocity curves and velocity-dispersion profiles along the major axis for six early-type spiral galaxies. Two of these galaxies, namely NGC 2179 and NGC 2775, are particularly suited for the study of dark matter halos. Using their luminosity profiles and modeling their stellar and gaseous kinematics, we derive the mass contributions of the luminous and the dark matter to the total potential. In NGC 2179 we find that the data (measured out to about the optical radius Ropt) unambiguously require the presence of a massive dark halo. For the brighter and bigger object NGC 2775, we can rule out a significant halo contribution at radii R < 0:6Ropt. Although preliminary, these results agree with the familiar mass distribution trend known for late-type spirals of comparable mass.

AB - We present the stellar and ionized-gas velocity curves and velocity-dispersion profiles along the major axis for six early-type spiral galaxies. Two of these galaxies, namely NGC 2179 and NGC 2775, are particularly suited for the study of dark matter halos. Using their luminosity profiles and modeling their stellar and gaseous kinematics, we derive the mass contributions of the luminous and the dark matter to the total potential. In NGC 2179 we find that the data (measured out to about the optical radius Ropt) unambiguously require the presence of a massive dark halo. For the brighter and bigger object NGC 2775, we can rule out a significant halo contribution at radii R < 0:6Ropt. Although preliminary, these results agree with the familiar mass distribution trend known for late-type spirals of comparable mass.

M3 - Article

SN - 1432-0746

VL - 342

SP - 671

EP - 686

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

ER -

Dark matter in early-type spiral galaxies: the case of NGC 2179 and of NGC 2775

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