TY - JOUR
T1 - Velocity dispersion around ellipticals in MOND
AU - Tiret, O.
AU - Combes, F.
AU - Angus, W.
AU - Famaey, B.
AU - Zhao, S.
PY - 2007/12
Y1 - 2007/12
N2 - We investigate how different models that have been proposed for solving the dark matter problem can fit the velocity dispersion observed around elliptical galaxies, on either a small scale (~20 kpc) with stellar tracers, such as planetary nebulae, or large scale (~200 kpc) with satellite galaxies as tracers. Predictions of Newtonian gravity, either containing pure baryonic matter, or embedded in massive cold dark matter (CDM) haloes, are compared with predictions of the modified gravity of MOND. The standard CDM model has problems on a small scale, and the Newtonian pure baryonic model has difficulties on a large scale, while a fit with MOND is possible on both scales.
AB - We investigate how different models that have been proposed for solving the dark matter problem can fit the velocity dispersion observed around elliptical galaxies, on either a small scale (~20 kpc) with stellar tracers, such as planetary nebulae, or large scale (~200 kpc) with satellite galaxies as tracers. Predictions of Newtonian gravity, either containing pure baryonic matter, or embedded in massive cold dark matter (CDM) haloes, are compared with predictions of the modified gravity of MOND. The standard CDM model has problems on a small scale, and the Newtonian pure baryonic model has difficulties on a large scale, while a fit with MOND is possible on both scales.
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U2 - 10.1051/0004-6361:20078569
DO - 10.1051/0004-6361:20078569
M3 - Article
AN - SCOPUS:38049160443
SN - 0004-6361
VL - 476
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
IS - 1
ER -