Results 111 to 120 of about 1,242,731 (210)
New dynamical description of the rotation curves of galaxies
, 2005 Observations of dynamics of galaxies and plasma in the universe led us to the conclusion that there exists a huge amount of matter that is invisible, the so called "dark matter".
Paduroiu, Sinziana, Rusu, Mircea
core +1 more source
Dark matter, modified gravity and galaxy rotation curves analyses: novel methods
, 2023 The current ΛCDM cosmological model considers dark matter to be the most abundant type of matter on the universe, encompassing approximately 26.8% of it. As its name suggests, dark matter cannot be directly observed by means of electromagnetic radiation,
Arboleda, Alejandro Hernandez
core
Global monopoles in Horndeski theory
European Physical Journal C: Particles and FieldsIn this article, global monopole solutions will be presented for the Horndeski theory by solving linearized field equations. We obtain two different classes of solutions depending on whether the Horndeski scalar field is massless or massive.
M. Haluk Seçuk, Özgür Delice
doaj +1 more source
A new estimator of the deceleration parameter from galaxy rotation curves
, 2016 Invited presentation at the 7th KIAS Workshop on Structure Formation and Cosmology (2016), accompanying https://doi.org/10.5281/zenodo.162267. Inertia is perturbed when the Rindler horizon drops beyond the cosmological horizon. Implication are confronted
Maurice H.P.M. van Putten +1 more
core +1 more source
The Astrophysical JournalModified Newtonian dynamics (MOND) was originally proposed to model galaxy rotation curves without dark matter. However, MOND presents difficulties in explaining the radial acceleration relation observed in galaxy clusters, and moreover, it does not ...
Robert Monjo
doaj +1 more source
The Astrophysical JournalRecent measurements of the Milky Way rotation curve found a sharp decline at around 15–20 kpc from the center of the Galaxy, suggesting that the Galactic dark matter halo is much less massive than predicted by other dynamical tracers.
Xiaowei Ou +5 more
doaj +1 more source
Distinct gas and stellar circular velocity curves in the Milky Way
Astronomy & AstrophysicsContext. The rotational velocity of interstellar gas in the Milky Way has been taken to represent the circular velocity of a test particle in the Galaxy’s gravitational field, and hence an indicator of the Galaxy’s mass.
Nelson A. H., Sofue Y., Williams P. R.
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
Perfect fluid dark matter: a viability test with galaxy rotation curves
European Physical Journal C: Particles and FieldsThe anomalous rotation curves of galaxies provide compelling evidence for dark matter, yet its fundamental nature and distribution remain key unresolved issues in astrophysics.
Jan Kuncewicz
doaj +1 more source
The Astrophysical JournalWe characterize stellar, gas, and dark matter mass distributions for 17 nearby massive disk galaxies from the PHANGS sample. This allows us to compute the gravitational potential that vertically confines the interstellar gas and determines its ...
Vivek Vijayakumar +7 more
doaj +1 more source