Velocity dispersion around ellipticals in MOND

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

    Research output: Contribution to journalArticle

    53 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.
    @article{5278cc68f85e4a92b46d123e0eb05a53,
    title = "Velocity dispersion around ellipticals in MOND",
    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.",
    author = "O. Tiret and F. Combes and W. Angus and B. Famaey and S. Zhao",
    year = "2007",
    month = "12",
    doi = "10.1051/0004-6361:20078569",
    language = "English",
    volume = "476",
    journal = "Astronomy and Astrophysics",
    issn = "0004-6361",
    publisher = "EDP Sciences",
    number = "1",

    }

    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

    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.

    UR - http://www.scopus.com/inward/record.url?scp=38049160443&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=38049160443&partnerID=8YFLogxK

    U2 - 10.1051/0004-6361:20078569

    DO - 10.1051/0004-6361:20078569

    M3 - Article

    VL - 476

    JO - Astronomy and Astrophysics

    JF - Astronomy and Astrophysics

    SN - 0004-6361

    IS - 1

    ER -