The modified Newtonian dynamics Fundamental Plane

V. F. Cardone, G. Angus, A. Diaferio, C. Tortora, R. Molinaro

    Research output: Contribution to journalArticle

    19 Citations (Scopus)

    Abstract

    Modified Newtonian dynamics (MOND) has been shown to be able to fit spiral galaxy rotation curves as well as giving a theoretical foundation for empirically determined scaling relations, such as the Tully-Fisher law, without the need for a dark matter halo. As a complementary analysis, one should investigate whether MOND can also reproduce the dynamics of early-type galaxies (ETGs) without dark matter. As a first step, we here show that MOND can indeed fit the observed central velocity dispersion σ0 of a large sample of ETGs assuming a simple MOND interpolating functions and constant anisotropy. We also show that, under some assumptions on the luminosity dependence of the Sérsic n parameter and the stellar mass-to-light ratio (M/L), MOND predicts a Fundamental Plane for ETGs: a loglinear relation among the effective radius Reff, σ0 and the mean effective intensity 〈Ie〉. However, we predict a tilt between the observed and the MOND Fundamental Planes.

    Original languageEnglish
    Pages (from-to)2617-2630
    Number of pages14
    JournalMonthly Notices of the Royal Astronomical Society
    Volume412
    Issue number4
    DOIs
    Publication statusPublished - Apr 2011

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    tilt
    anisotropy
    galaxies
    dark matter
    mass to light ratios
    spiral galaxies
    stellar mass
    halos
    luminosity
    scaling
    radii
    curves
    need
    analysis
    parameter

    All Science Journal Classification (ASJC) codes

    • Space and Planetary Science
    • Astronomy and Astrophysics

    Cite this

    Cardone, V. F. ; Angus, G. ; Diaferio, A. ; Tortora, C. ; Molinaro, R. / The modified Newtonian dynamics Fundamental Plane. In: Monthly Notices of the Royal Astronomical Society. 2011 ; Vol. 412, No. 4. pp. 2617-2630.
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    The modified Newtonian dynamics Fundamental Plane. / Cardone, V. F.; Angus, G.; Diaferio, A.; Tortora, C.; Molinaro, R.

    In: Monthly Notices of the Royal Astronomical Society, Vol. 412, No. 4, 04.2011, p. 2617-2630.

    Research output: Contribution to journalArticle

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