Results 1 to 10 of about 957 (185)
Galaxy rotation curves via conformal factors [PDF]
European Physical Journal C: Particles and Fields, 2018 We propose a new formula to explain circular velocity profiles of spiral galaxies obtained from the Starobinsky model in the Palatini formalism. It is based on the assumption that the gravity can be described by two conformally related metrics: one of ...
Ciprian A. Sporea +2 more
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Modeling the Rising Tails of Galaxy Rotation Curves [PDF]
Galaxies, 2019 It is well known, but under-appreciated in astrophysical applications, that it is possible for gravity to take on a life of its own in the form of Weyl-curvature-only metrics (note that we are referring to the Weyl-only solutions of ordinary General ...
Fan Zhang
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A Simple Model for Explaining Galaxy Rotation Curves [PDF]
Galaxies, 2018 A new simple expression for the circular velocity of spiral galaxies is proposed and tested against HI Nearby Galaxy Survey (THINGS) data set. Its accuracy is compared with the one coming from MOND.
Aneta Wojnar +2 more
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On the Dwarf Galaxy Rotation Curve Diversity Problem [PDF]
Galaxies, 2018 In this paper, we show how baryonic physics can solve the problem of the striking diversity in dwarf galaxy rotation curves shapes. To this aim, we compare the distribution of galaxies of the SPARC sample, in the plane V2kpc-VRlast (V2kpc being the ...
Antonino Del Popolo +2 more
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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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Flattened Galaxy Rotation Curves in the Exochronous Metric
GalaxiesWe examine some of the consequences of the Exochronous (timeless) metric and the associated ΣGR cosmological model for the formation of galaxies, and, in particular, their characteristic rotation curves.
Robin Booth
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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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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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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 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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