76 citations · 248 across the 8 of their papers we have counts for
8 papers
The distribution of dark and luminous matter inferred from extended rotation curves
Roelof Bottema, Jose Luis G. Pestana
A better understanding of the formation of mass structures in the universe can be obtained by determining the amount and distribution of dark and luminous matter in spiral galaxies…
Simulations of Normal Spiral Galaxies
Roelof Bottema
Results are presented of numerical simulations of normal isolated late type spiral galaxies. Specifically the galaxy NGC 628 is used as a template. The method employs a TREESPH cod…
MOND rotation curves for spiral galaxies with Cepheid-based distances
Roelof Bottema, Jose L. G. Pestana, Barry Rothberg +1
Rotation curves for four spiral galaxies with recently determined Cepheid-based distances are reconsidered in terms of modified Newtonian dynamics (MOND). For two of the objects, N…
Dark and luminous matter in the NGC 3992 group of galaxies, II. The dwarf companions UGC 6923, UGC 6940, UGC 6969, and the Tully-Fisher relation
Roelof Bottema
Detailed neutral hydrogen observations have been obtained of the large barred spiral galaxy NGC 3992 and its three small companion spiral galaxies, UGC 6923, UGC 6940, and UGC 6969…
Dark and luminous matter in the NGC 3992 group of galaxies, I. The large barred spiral NGC 3992
Roelof Bottema, Marc A. W. Verheijen
Detailed neutral hydrogen observations have been obtained of the large barred spiral galaxy NGC 3992 and its three small companion galaxies, UGC 6923, UGC 6940, and UGC 6969. For t…
The kinematics of the bulge and the disc of NGC 7331
Roelof Bottema
Presented are spectroscopic emission and absorption line observations along the major axis of the Sb galaxy NGC 7331. The kinematics of the ionized gas and the stars appears to be…