Results 21 to 30 of about 2,129 (213)
Galaxy rotation curve in hyperconical universes: a natural relativistic MOND [PDF]
, 2023 Modified Newtonian dynamics (MOND) and similar proposals can (at least partially) explain the excess rotation of galaxies or the equivalent mass-discrepancy acceleration, without (or by reducing) the requirement of dark matter halos.
Robert Monjo +2 more
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HI Rotation Curves of Galaxies [PDF]
Symposium - International Astronomical Union, 1987 The observational evidence on the discrepancy between the mass distribution in galaxies derived from HI rotation curves and that derived from the distribution of light is reviewed. In the outer parts the discrepancy is such that in some galaxies there is at least three times as much dark matter as luminous matter.
SANCISI, R, VANALBADA, TS
openaire +2 more sources
vcdisk.py: Rotation curves of thick galaxy disks [PDF]
, 2022 vcdisk: Rotation curves of thick galaxy disks A minimal python module to solve Poisson's equation in a thick galactic disk. This is useful to compute the circular velocity on the disk plane of a galaxy with observed surface density profile and ...
Lorenzo Posti
core +1 more source
Gravitomagnetism and galaxy rotation curves: a cautionary tale [PDF]
, 2023 We investigate recent claims that gravitomagnetic effects in linearised general relativity can explain flat and rising rotation curves, such as those observed in galaxies, without the need for dark matter.
core +2 more sources
Rotation Curves of 967 Spiral Galaxies [PDF]
The Astrophysical Journal Supplement Series, 1995 We present the rotation curves (RCs) of 967 spiral galaxies, obtained by folding and deprojecting the raw optical data by Mathewson et al. (1992). Out of these, we have identified 80 excellent RCs and 820 fair RCs. The 80 excellent RCs are smooth, symmetric, have negligible rms internal error, extend to at least the optical radius, and have high and ...
Persic, M., Salucci, P.
openaire +3 more sources
Rotation Curve of the Galaxy [PDF]
Publications of the Astronomical Society of Japan, 1997 Reanalyzing the galactic HI survey data with two methods which make use of the geometry of the galactic disk, we explore the outer rotation curve. In addition to the derivation of the outer rotation curve, we investigate their uncertainties, which have not been established previously.
Mareki Honma, Yoshiaki Sofue
openaire +1 more source
Low-mass galaxy rotation curves that fail as dynamical mass tracers [PDF]
, 2023 It is routinely assumed that galaxy rotation curves are equal to their circular velocity curves (modulo some corrections) such that they are good dynamical mass tracers.
Oman, K. A., Downing, E. R.
core +1 more source
The universal rotation curve of spiral galaxies [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2006 Abstract The observed strong dark-to-luminous matter coupling is described by a bias relation between visible and dark matter sources. We discuss the bias which emerges in the case where the topological structure of the Universe at very large distances does not properly match that of the Friedman space. With the use of such ‘topological’
Kirillov, AA, Turaev, D
openaire +3 more sources
Understanding the shape and diversity of dwarf galaxy rotation curves in LCDM [PDF]
, 2019 The shape and wide diversity of dwarf galaxy rotation curves is at apparent odds with dark matter halos in LCDM. We generate mock rotation curve data from dwarf galaxy simulations to show that this owes to bursty star formation driven by stellar feedback.
Agertz, Oscar +3 more
core +7 more sources
Galaxies with Declining Rotation Curves [PDF]
Astronomy Reports, 2020 A sample of 22 spiral galaxies compiled from published data is studied. The galaxy rotation curves pass through a maximum distance of more than $\sim 1$ kpc from the center with a subsequent decrease in the rotation velocity. The galaxy position in the Tully-Fisher (TF) and baryonic Tully-Fisher (BTF) diagrams show that the values of maximum rotation ...
Zobnina, D. I., Zasov, A. V.
openaire +2 more sources