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 journalArticlepeer-review

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 anisotropies required to fit the los velocity dispersions are remarkably similar to the anisotropies 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
Number of pages4
JournalMonthly Notices of the Royal Astronomical Society
Volume383
DOIs
Publication statusPublished - 1 Jan 2008

Keywords

  • gravitation
  • galaxies : clusters
  • dark matter
  • ELLIPTIC GALAXY NGC-720
  • TIDAL DWARF GALAXIES
  • X-RAY CONSTRAINTS
  • DARK-MATTER
  • MISSING MASS
  • MOND
  • CLUSTERS
  • GRAVITY
  • NEUTRINOS
  • PHYSICS

Fingerprint

Dive into the research topics of 'The velocity distribution of Sloan Digital Sky Survey satellites in Modified Newtonian Dynamics'. Together they form a unique fingerprint.

Cite this