The velocity distribution of Sloan Digital Sky Survey satellites in Modified Newtonian Dynamics

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

    Research output: Contribution to journalLetter

    21 Citations (Scopus)

    Abstract

    The recent Sloan Digital Sky Survey measured velocity distribution of satellite galaxies has been modelled in the context of Modified Newtonian Dynamics (MOND). We show that even when the extra constraint of adhering to the projected satellite number density profile is added, the two line-of-sight (los) velocity dispersion profiles presented in Klypin & Prada can be matched simply with a radially varying anisotropy. Interestingly, the anisotropics required to fit the los velocity dispersions are remarkably similar to the anisotropics generated by dissipationless collapse simulations in MOND. The mass-to-light ratios of the two host galaxies used are sensible, and positivity of the distribution function is satisfied.

    Original languageEnglish
    JournalMonthly Notices of the Royal Astronomical Society: Letters
    Volume383
    Issue number1
    DOIs
    Publication statusPublished - Jan 2008

    Fingerprint

    line of sight
    velocity distribution
    galaxies
    mass to light ratios
    profiles
    distribution functions
    anisotropy
    simulation
    distribution

    All Science Journal Classification (ASJC) codes

    • Astronomy and Astrophysics
    • Space and Planetary Science

    Cite this

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    title = "The velocity distribution of Sloan Digital Sky Survey satellites in Modified Newtonian Dynamics",
    abstract = "The recent Sloan Digital Sky Survey measured velocity distribution of satellite galaxies has been modelled in the context of Modified Newtonian Dynamics (MOND). We show that even when the extra constraint of adhering to the projected satellite number density profile is added, the two line-of-sight (los) velocity dispersion profiles presented in Klypin & Prada can be matched simply with a radially varying anisotropy. Interestingly, the anisotropics required to fit the los velocity dispersions are remarkably similar to the anisotropics generated by dissipationless collapse simulations in MOND. The mass-to-light ratios of the two host galaxies used are sensible, and positivity of the distribution function is satisfied.",
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    The velocity distribution of Sloan Digital Sky Survey satellites in Modified Newtonian Dynamics. / Angus, G. W.; Famaey, B.; Tiret, O.; Combes, F.; Zhao, H. S.

    In: Monthly Notices of the Royal Astronomical Society: Letters, Vol. 383, No. 1, 01.2008.

    Research output: Contribution to journalLetter

    TY - JOUR

    T1 - The velocity distribution of Sloan Digital Sky Survey satellites in Modified Newtonian Dynamics

    AU - Angus, G. W.

    AU - Famaey, B.

    AU - Tiret, O.

    AU - Combes, F.

    AU - Zhao, H. S.

    PY - 2008/1

    Y1 - 2008/1

    N2 - The recent Sloan Digital Sky Survey measured velocity distribution of satellite galaxies has been modelled in the context of Modified Newtonian Dynamics (MOND). We show that even when the extra constraint of adhering to the projected satellite number density profile is added, the two line-of-sight (los) velocity dispersion profiles presented in Klypin & Prada can be matched simply with a radially varying anisotropy. Interestingly, the anisotropics required to fit the los velocity dispersions are remarkably similar to the anisotropics generated by dissipationless collapse simulations in MOND. The mass-to-light ratios of the two host galaxies used are sensible, and positivity of the distribution function is satisfied.

    AB - The recent Sloan Digital Sky Survey measured velocity distribution of satellite galaxies has been modelled in the context of Modified Newtonian Dynamics (MOND). We show that even when the extra constraint of adhering to the projected satellite number density profile is added, the two line-of-sight (los) velocity dispersion profiles presented in Klypin & Prada can be matched simply with a radially varying anisotropy. Interestingly, the anisotropics required to fit the los velocity dispersions are remarkably similar to the anisotropics generated by dissipationless collapse simulations in MOND. The mass-to-light ratios of the two host galaxies used are sensible, and positivity of the distribution function is satisfied.

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