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A new empirical fit to galaxy rotation curves
Frontiers in Astronomy and Space Sciences, 2023 We present a new empirical model for galaxy rotation curves that introduces a velocity correction term ω, derived from observed stellar motion and anchored to Keplerian baselines.
David C. Flynn, Jim Cannaliato
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Galaxy Size and Rotation Curve Diversity in ΛCDM with Baryons
The Astrophysical JournalThe observed rotation curves of dwarf galaxies exhibit significant diversity at fixed halo mass, challenging galaxy formation within the cold dark matter (CDM) model.
Akaxia Cruz +9 more
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Uncertainties in galaxy rotation curves [PDF]
Monthly Notices of the Royal Astronomical Society, 2021 ABSTRACT Assessing the likelihood that the rotation curve of a galaxy matches predictions from galaxy formation simulations requires that the uncertainties in the circular speed as a function of radius derived from the observational data be statistically robust. Few uncertainties presented in the literature meet this requirement. In this
Sellwood, J A +2 more
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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.
Hobson, M. P. +2 more
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On the Extraction of Optical Rotation Curves for Spiral Galaxies [PDF]
Journal of Astronomy and Space Sciences, 1998 We discussed four different methods - the single, double and triple Gaussian fits, and the intensity weighted centroid fit - which extract rotation curves from several emission lines ([OII], Hβ, [OIII], and Hα) of spiral galaxies. Spatial extents and the
Young-Jong Sohn +2 more
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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
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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.
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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
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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
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