Results 51 to 60 of about 1,810 (211)
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
openaire +5 more sources
Mass Models of the Milky Way and Estimation of Its Mass from the Gaia DR3 Data Set
The Astrophysical Journal, 2023 We use data from the Gaia DR3 data set to estimate the mass of the Milky Way (MW) by analyzing the rotation curve in the range of distances 5 to 28 kpc. We consider three mass models: The first model adds a spherical dark matter (DM) halo, following the ...
Francesco Sylos Labini +3 more
doaj +1 more source
The Nearly Universal Disk Galaxy Rotation Curve
The Astrophysical JournalThe universal rotation curve (URC) of disk galaxies was originally proposed to predict the shape and amplitude of any rotation curve (RC) based solely on photometric data.
Raj Patel +5 more
doaj +1 more source
The Discrepancy in Galaxy Rotation Curves
, 2019 In this work we try a new approach for dealing with the discrepancy between observed galaxy rotation curves and theoretical predictions. This new approach does not involve any changes in the current fundamental laws of nature or the addition of dark halos.
Gomel, Roy, Zimmerman, Tomer
openaire +2 more sources
Rotation curves of galaxies by fourth order gravity [PDF]
Physical Review D, 2011 We investigate the radial behavior of galactic rotation curves by a Fourth Order Gravity adding also the Dark Matter component. The Fourth Order Gravity is a Lagrangian containing the Ricci scalar, the Ricci and Riemann tensor, but the rotation curves are depending only on two free parameters.
G. Scelza, A. Stabile
openaire +3 more sources
Open Astronomy, 2018 The properties of unstable large-scale hydrodynamic (HD) modes of oscillations in the gaseous disk of a flat galaxy with a rotation curve having a velocity jump in the inner region of the disk are numerically investigated.
Torgashin Yury, Omurkanov Turgunbek
doaj +1 more source
Two-component galaxies with flat rotation curve [PDF]
Monthly Notices of the Royal Astronomical Society, 2009 11 pages, 5 figures, accepted by ...
CIOTTI, LUCA +2 more
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Galaxy rotation curves in the Grumiller's modified gravity [PDF]
Monthly Notices of the Royal Astronomical Society, 2013 12 pages, 3 figures, 4 ...
Hai-Nan Lin +3 more
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Rotation curves of galaxies in GR
, 2023 It has been suggested that the observed flat rotation curves of disk galaxies can be a peculiar effect of General Relativity (GR) rather than evidence for the presence of dark matter (DM) halos in Newtonian gravity. In Ciotti (2022) the problem has been quantitatively addressed by using the well known weak-field, low-velocity gravitomagnetic limit of ...
openaire +2 more sources
Gravothermal Solutions of SIDM Halos: Mapping from Constant to Velocity-dependent Cross Section
The Astrophysical Journal, 2023 The scale-free gravothermal fluid formalism has long proved effective in describing the evolution of self-interacting dark matter halos with a constant dark matter particle cross section.
Shengqi Yang +6 more
doaj +1 more source