The rotation curve of DDO 154 - A particularly acute test of the modified dynamics

Details The rotation curve of DDO 154 - A particularly acute test of the modified dynamics The rotation curve of DDO 154 - A particularly acute test of the modified dynamics

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...334..130m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 334, Nov. 1, 1988, p. 130-133.

Astronomy and Astrophysics

Astrophysics

31

Galactic Rotation, Space Density, H I Regions, Luminosity

Scientific paper

The authors compare the rotation curve of DDO 154, calculated in the framework of the modified dynamics, with the observed rotation curve reported recently by Carignan and Freeman. DDO 154 stands out as a very crucial test for two reasons: (1) The accelerations measured within it are, by far, the lowest reported for any galaxy that is amenable to a rotation curve analysis. (2) The mass of the galaxy is dominated by the contribution of H I which is measured directly. The authors find very good agreement between the calculated and observed rotation curves, with the value of the acceleration constant a0 ≈ 1.3×10-8cm s-1.

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