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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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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