ANDROMEDA DWARFS IN LIGHT OF MOND. II. TESTING PRIOR PREDICTIONS

Journal Article · Tue Oct 01 00:00:00 EDT 2013 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/775/2/139· OSTI ID:22270879

McGaugh, Stacy ^[1]; Milgrom, Mordehai ^[2]

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1. Department of Astronomy, Case Western Reserve University, Cleveland, OH 44106 (United States)
2. Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 76100 (Israel)

We employ recently published measurements of the velocity dispersions in the newly discovered dwarf satellite galaxies of Andromeda to test our previously published predictions of this quantity. The data are in good agreement with our specific predictions for each dwarf made a priori with modified Newtonian dynamics (MOND), with reasonable stellar mass-to-light ratios, and no dark matter, while Newtonian dynamics point to quite large mass discrepancies in these systems. MOND distinguishes between regimes where the internal field of the dwarf, or the external field of the host, dominates. The data appear to recognize this distinction, which is a unique feature of MOND not explicable in ΛCDM.

• OSTI ID: 22270879
• Journal Information: Astrophysical Journal, Vol. 775, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ASTROPHYSICS
COSMOLOGICAL CONSTANT
COSMOLOGY
GALAXIES
MASS
NONLUMINOUS MATTER
VELOCITY
VISIBLE RADIATION