Velocity dispersion around ellipticals in MOND

O. Tiret, F. Combes, W. Angus, B. Famaey, S. Zhao

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

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.

Original languageEnglish
JournalAstronomy and Astrophysics
Volume476
Issue number1
DOIs
Publication statusPublished - Dec 2007

Fingerprint

dark matter
tracer
gravity
tracers
prediction
gravitation
elliptical galaxies
planetary nebulae
predictions
halos
galaxies
cold

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Tiret, O. ; Combes, F. ; Angus, W. ; Famaey, B. ; Zhao, S. / Velocity dispersion around ellipticals in MOND. In: Astronomy and Astrophysics. 2007 ; Vol. 476, No. 1.
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Velocity dispersion around ellipticals in MOND. / Tiret, O.; Combes, F.; Angus, W.; Famaey, B.; Zhao, S.

In: Astronomy and Astrophysics, Vol. 476, No. 1, 12.2007.

Research output: Contribution to journalArticle

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