期刊
ASTROPHYSICAL JOURNAL
卷 775, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/775/2/139
关键词
dark matter; galaxies: kinematics and dynamics; Local Group
资金
- NSF [AST AST0908370]
- NASA ADAP grant [NNX11AF89G]
- NASA [147141, NNX11AF89G] Funding Source: Federal RePORTER
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 Lambda CDM.
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