Results 51 to 60 of about 2,129 (213)
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
Single Parameter Model for Galaxy Rotation Curves
GalaxiesOne key piece of evidence for dark matter is the rotation-curve problem: the disagreement between measured galactic rotation curves and their luminous mass.
Sophia N. Cisneros +4 more
doaj +1 more source
Mass Distribution and Rotation Curve in the Galaxy [PDF]
, 2013 The mass distribution in the Galaxy is determined by dynamical and photometric methods. Rotation curves are the major tool for determining the dynamical mass distribution in the Milky Way and spiral galaxies. The photometric (statistical) method utilizes luminosity profiles from optical and infrared observations, and assumes empirical values of the ...
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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.
Stabile, A., Scelza, G.
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Correlation functions of matter from galaxy rotation curves [PDF]
, 1991 Based on the disk-halo decomposition method introduced by Persic & Salucci, we use 58 spiral rotation curves to measure the galaxy-background correlation function in the range 3-350 kpc (for H0 = 50 km s-1 Mpc-1).
Salucci, P. +7 more
core +1 more source
Kinematic and Dynamics of the Galaxy ESO 358-60
The Astrophysical JournalWe investigate the velocity field derived from H I measurements of the irregular galaxy ESO 358-60 using the velocity ring model (VRM) method. This technique, which assumes a coplanar disk, allows us to reconstruct coarse-grained maps of both radial and ...
Francesco Sylos Labini +1 more
doaj +1 more source
Advanced Robotics Research, EarlyView.This article introduces a soft wearable eyelid sling device incorporating a hydraulic soft artificial muscle (SAM) for achieving complete closure of an eyelid. The SAM is driven by a cam mechanism that provides a displacement profile closely matched with those of a healthy eyelid.
Patrick Pruscino +7 more
wiley +1 more source
Dark matter and galaxy rotation curves [PDF]
, 2017 Cosmological N-body simulations on structure formation in a Λ−CDM scenario point to a mass density distribution of dark matter, in local objects like galaxies, that are in strong tension with recent observations on low surface brightness galaxies ...
López Fune, Ernesto
core
Solid Harmonic Wavelet Bispectrum for Image Analysis
Advanced Science, EarlyView.The Solid Harmonic Wavelet Bispectrum (SHWB), a rotation‐ and translation‐invariant descriptor that captures higher‐order (phase) correlations in signals, is introduced. Combining wavelet scattering, bispectral analysis, and group theory, SHWB achieves interpretable, data‐efficient representations and demonstrates competitive performance across texture,
Alex Brown +3 more
wiley +1 more source
Advanced Science, EarlyView.We have shown that both simulated and actual spaceflight contribute to cartilage degradation in the knees of mice. Using RNA sequencing and bioenergetic profiling, we identified NADPH oxidase 4 (NOX4) as a key factor driving these changes. Additionally, we found that kaempferol, a naturally occurring flavonoid that binds directly to NOX4, reduces ...
Yuesong Yin +23 more
wiley +1 more source