4.4 Article

Galaxy rotation curve in hyperconical universes: a natural relativistic MOND

Related references

Note: Only part of the references are listed.
Article Astronomy & Astrophysics

A comparison of the baryonic Tully-Fisher relation in MaNGA and IllustrisTNG

Julian S. Goddy et al.

Summary: This study compares the observed baryonic Tully-Fisher relation (BTFR) from the MaNGA and HI-MaNGA surveys to a simulated BTFR from the IllustrisTNG simulation. The results show that the BTFRs from MaNGA and IllustrisTNG agree within uncertainties, indicating that IllustrisTNG has successfully created a galaxy population that follows the observed relationship between mass and rotation velocity in the universe.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2023)

Article Astronomy & Astrophysics

The massive relic galaxy NGC 1277 is dark matter deficient From dynamical models of integral-field stellar kinematics out to five effective radii

Sebastien Comeron et al.

Summary: According to the Lambda CDM cosmology, galaxies with stellar masses greater than 10^11 solar masses should contain a significant amount of dark matter. However, observations of the NGC1277 galaxy show a lack of dark matter within 5 effective radii, contradicting the expectations of the Lambda CDM theory. This suggests that NGC1277 either lost its dark matter early on or was initially dark matter deficient.

ASTRONOMY & ASTROPHYSICS (2023)

Article Astronomy & Astrophysics

The gravito-electromagnetic approximation to the gravimagnetic dipole and its velocity rotation curve

Jan Govaerts

Summary: Considering the observed flat rotation curves of spiral galaxies, it is suggested that the flattening may be a result of a stationary axisymmetric spacetime curvature without the need for dark matter particles. This possibility is explored in the case of a gravimagnetic dipole and its tensionless Misner string as an exact vacuum solution to Einstein's equations. By analyzing the situation within the limits of weak field gravito-electromagnetism and nonrelativistic dynamics, interesting and encouraging results are obtained.

CLASSICAL AND QUANTUM GRAVITY (2023)

Article Astronomy & Astrophysics

Pitfalls in applying gravitomagnetism to galactic rotation curve modelling

Kostas Glampedakis et al.

Summary: The flatness of galaxy rotation curves at large radii is considered as supporting evidence for dark matter. Some studies have suggested that post-Newtonian corrections could eliminate the need for dark matter. However, recent research has identified errors in these claims, including technical and fundamental mistakes in the calculations. Our work reinforces the consensus that post-Newtonian effects are too small to significantly alter galactic rotation curves and provides a guide for avoiding common errors in such calculations.

CLASSICAL AND QUANTUM GRAVITY (2023)

Article Astronomy & Astrophysics

Understanding galaxy rotation curves with Verlinde's emergent gravity

Youngsub Yoon et al.

Summary: This study presents the analysis of galaxy rotation curves using Verlinde's emergent gravity. The results show that the predicted and observed gravitational accelerations agree well, suggesting that Verlinde's emergent gravity could be a good solution to the missing mass problem.

CLASSICAL AND QUANTUM GRAVITY (2023)

Article Astronomy & Astrophysics

The cosmic timeline implied by the JWST high-redshift galaxies

Fulvio Melia

Summary: The impossibly early galaxy problem, identified by the Hubble Space Telescope and exacerbated by JWST's recent discoveries, suggests a faster rate of star formation than predicted by simulations. The R-h = ct universe, which incorporates the zero active mass condition from general relativity, provides a better explanation for cosmological data and eliminates the inconsistencies in the current standard model. The latest JWST discoveries, if confirmed, would further support the R-h = ct universe.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2023)

Article Astronomy & Astrophysics

JWST early Universe observations and Lambda CDM cosmology

Rajendra P. Gupta

Summary: Deep space observations of the JWST suggest that very early Universe galaxies may be as evolved as galaxies that have existed for much longer, which contradicts the Lambda CDM cosmological model. While tired light models explain the JWST data, they don't account for other observations like isotropy of the cosmic microwave background. Hybrid models that combine tired light and Lambda CDM have been proposed, with covarying coupling constants and yielding a stretched age of the Universe that resolves the "impossible early galaxy" problem.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2023)

Article Astronomy & Astrophysics

Gravitomagnetism and galaxy rotation curves: a cautionary tale

A N Lasenby et al.

CLASSICAL AND QUANTUM GRAVITY (2023)

Article Astronomy & Astrophysics

Geometric perspective for explaining Hubble tension: theoretical and observational aspects

Robert Monjo et al.

Summary: The Universe expansion rate has two incompatible but precise values and this causes Hubble tension, adding to other cosmological questions. This study aims to explain the Hubble tension by using a geometrical interpretation of observational viewpoints in embedded manifolds. The model proposes a link between the behaviors of different universes and a dark-energy-like phenomenon emerges from the distortion of metrics.

CLASSICAL AND QUANTUM GRAVITY (2023)

Article Astronomy & Astrophysics

Galaxy clusters in high definition: A dark matter search

Geoff Beck et al.

Summary: Recent radio-frequency probes using the ATCA and ASKAP telescopes have made significant progress in indirectly constraining the properties of dark matter, surpassing the constraining power of Fermi-LAT data. This study reexamines the potential of galaxy clusters, which are often overlooked due to radio backgrounds, by extrapolating known cluster surface brightness profiles observable with MeerKAT. Despite baryonic backgrounds, clusters can compete with dwarf galaxies, with extrapolated Coma data ruling out weakly interacting massive particles of mass < 700 GeV annihilating via b-quarks. This is due to the clash between the inner shape of the dark matter halo and the flat inner profile of radio halos, with supporting evidence in the literature for Navarro-Frenk-White-like Einasto profiles.

PHYSICAL REVIEW D (2023)

Article Astronomy & Astrophysics

Galaxy-scale Test of General Relativity with Strong Gravitational Lensing

Xiao-Hui Liu et al.

Summary: In this study, we test general relativity at the galactic scale using a newly compiled galaxy-scale strong gravitational lensing sample. We find that the choice of lens models significantly affects the constraints on the PPN parameter gamma(PPN). The most reliable lens model yields a result that is in good agreement with the prediction of general relativity. Our 6.4% constraint result is the best result so far among recent works using the SGL method.

ASTROPHYSICAL JOURNAL (2022)

Article Astronomy & Astrophysics

Atmospheric Dynamics of Temperate Sub-Neptunes. I. Dry Dynamics

Hamish Innes et al.

Summary: This study explores the dynamics of dry atmospheres of temperate sub-Neptunes and finds weak horizontal temperature gradients and zonal wind structures dominated by high-latitude cyclostrophic jets. Additionally, superrotating equatorial jets are observed, potentially driven by a Rossby-Kelvin instability.

ASTROPHYSICAL JOURNAL (2022)

Article Astronomy & Astrophysics

The distribution and morphologies of Fornax Cluster dwarf galaxies suggest they lack dark matter

Elena Asencio et al.

Summary: Due to their low surface brightness, dwarf galaxies are vulnerable to tidal forces. This study compares the properties of dwarf galaxies in the Fornax Cluster with the Lambda Cold Dark Matter (Lambda CDM) cosmological model and Milgromian dynamics (MOND). The results show that MOND is more consistent with the observed deformations and the lack of low surface brightness dwarfs in the Fornax Cluster than the Lambda CDM model.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2022)

Article Astronomy & Astrophysics

Panic! at the Disks: First Rest-frame Optical Observations of Galaxy Structure at z > 3 with JWST in the SMACS 0723 Field

Leonardo Ferreira et al.

Summary: This study presents early results on the morphological and structural properties of galaxies at z > 3 observed with the JWST. The discovery of a higher number of disk galaxies at z > 1.5 compared to the Hubble Space Telescope observations is surprising.

ASTROPHYSICAL JOURNAL LETTERS (2022)

Article Astronomy & Astrophysics

Result of the MICROSCOPE weak equivalence principle test

Pierre Touboul et al.

Summary: The MICROSCOPE space mission, dedicated to testing the equivalence principle, was operational from April 25, 2016, until October 16, 2018. The analysis compares the free-fall accelerations of two test masses using the Eotvos parameter eta(A,B)=2aA-aBaA+aB.

CLASSICAL AND QUANTUM GRAVITY (2022)

Article Astronomy & Astrophysics

Asymmetrical tidal tails of open star clusters: stars crossing their cluster's prah† challenge Newtonian gravitation

Pavel Kroupa et al.

Summary: After their birth, many stars go through the tidal threshold of their cluster and enter the classical tidal tails. The asymmetry between the leading and trailing tails is a test of gravitational theory. Observations of open clusters show that there are more stars in the leading tail than in the trailing tail. Future research is needed to study the tidal tails around open clusters of different ages and develop appropriate methods for analysis.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2022)

Article Astronomy & Astrophysics

Distinguishing Dark Matter, Modified Gravity, and Modified Inertia with the Inner and Outer Parts of Galactic Rotation Curves

Kyu-Hyun Chae

Summary: The missing gravity in galaxies can be explained by dark matter, modified gravity, or modified inertia. This study compares and tests predictions of cold dark matter halos, modified gravity, and modified inertia using a statistical sample of galaxy rotation curves. The results show that modified gravity correctly predicts the observed statistical relation of accelerations, while cold dark matter halos deviate from the observed relation. The study suggests that modified gravity is the most natural explanation for all aspects of rotation curves.

ASTROPHYSICAL JOURNAL (2022)

Article Physics, Particles & Fields

Galactic rotation curve and dark matter according to gravitomagnetism

G. O. Ludwig

Summary: This study demonstrates that the gravitomagnetic field generated by mass currents modifies the rotation curve of galaxies, deviating from traditional theories. By solving a nonlinear differential equation, the rotation curve of galaxies can be reproduced without the need for dark matter components. A two-dimensional model is developed to estimate the total mass, central mass density, and overall shape of galaxies.

EUROPEAN PHYSICAL JOURNAL C (2021)

Article Physics, Multidisciplinary

New Relativistic Theory for Modified Newtonian Dynamics

Constantinos Skordis et al.

Summary: The proposed relativistic gravitational theory leads to a modified Newtonian dynamics paradigm that explains the observed universal galactic acceleration scale and related phenomena. It meets the phenomenological requirements and is consistent with the observed cosmic microwave background and matter power spectra on linear cosmological scales. The theory shows stability without ghost instabilities and the possibility of being embedded in a more fundamental theory.

PHYSICAL REVIEW LETTERS (2021)

Article Astronomy & Astrophysics

Planck 2018 results: VI. Cosmological parameters

N. Aghanim et al.

ASTRONOMY & ASTROPHYSICS (2020)

Article Astronomy & Astrophysics

Lagrangian density and local symmetries of inhomogeneous hyperconical universes

Robert Monjo et al.

CLASSICAL AND QUANTUM GRAVITY (2020)

Article Multidisciplinary Sciences

Satellite Laser-Ranging as a Probe of Fundamental Physics

Ignazio Ciufolini et al.

SCIENTIFIC REPORTS (2019)

Article Astronomy & Astrophysics

The baryonic Tully-Fisher relation for different velocity definitions and implications for galaxy angular momentum

Federico Lelli et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2019)

Article Astronomy & Astrophysics

The scaling relationship between baryonic mass and stellar disc size in morphologically late-type galaxies

Po-Feng Wu

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2018)

Article Astronomy & Astrophysics

Geometric interpretation of the dark energy from projected hyperconical universes

R. Monjo

PHYSICAL REVIEW D (2018)

Article Physics, Multidisciplinary

The zero active mass condition in Friedmann-Robertson-Walker cosmologies

Fulvio Melia

FRONTIERS OF PHYSICS (2017)

Article History & Philosophy Of Science

Cosmology and convention

David Merritt

STUDIES IN HISTORY AND PHILOSOPHY OF MODERN PHYSICS (2017)

Article Astronomy & Astrophysics

Continuum-mediated dark matter-baryon scattering

Andrey Katz et al.

PHYSICS OF THE DARK UNIVERSE (2016)

Article Astronomy & Astrophysics

THE SMALL SCATTER OF THE BARYONIC TULLY-FISHER RELATION

Federico Lelli et al.

ASTROPHYSICAL JOURNAL LETTERS (2016)

Article Astronomy & Astrophysics

The mass discrepancy acceleration relation in a ΛCDM context

Arianna Di Cintio et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2016)

Article Chemistry, Physical

The 'Missing Mass Problem' in Astronomy and the Need for a Modified Law of Gravity

Sascha Trippe

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES (2014)

Article Astronomy & Astrophysics

DARK MATTER HALO PROFILES OF MASSIVE CLUSTERS: THEORY VERSUS OBSERVATIONS

Suman Bhattacharya et al.

ASTROPHYSICAL JOURNAL (2013)

Article Astronomy & Astrophysics

The Rh=ct universe

F. Melia et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2012)

Review Physics, Particles & Fields

Modified Newtonian Dynamics (MOND): Observational Phenomenology and Relativistic Extensions

Benoit Famaey et al.

LIVING REVIEWS IN RELATIVITY (2012)

Article Physics, Multidisciplinary

Support for the Thermal Origin of the Pioneer Anomaly

Slava G. Turyshev et al.

PHYSICAL REVIEW LETTERS (2012)

Review Astronomy & Astrophysics

The Dark Matter Crisis: Falsification of the Current Standard Model of Cosmology

P. Kroupa

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA (2012)

Article Physics, Multidisciplinary

High precision thermal modeling of complex systems with application to the flyby and Pioneer anomaly

Benny Rievers et al.

ANNALEN DER PHYSIK (2011)

Article Physics, Multidisciplinary

Support for Temporally Varying Behavior of the Pioneer Anomaly from the Extended Pioneer 10 and 11 Doppler Data Sets

Slava G. Turyshev et al.

PHYSICAL REVIEW LETTERS (2011)

Article Physics, Particles & Fields

On the origin of gravity and the laws of Newton

Erik Verlinde

JOURNAL OF HIGH ENERGY PHYSICS (2011)

Article Astronomy & Astrophysics

On the equivalence principle and gravitational and inertial mass relation of classical charged particles

Mario Goto et al.

CLASSICAL AND QUANTUM GRAVITY (2010)

Article Physics, Multidisciplinary

Hamiltonian Formulation of f(Riemann) Theories of Gravity

Nathalie Deruelle et al.

PROGRESS OF THEORETICAL PHYSICS (2010)

Article Astronomy & Astrophysics

HIGH-RESOLUTION ROTATION CURVES AND GALAXY MASS MODELS FROM THINGS

W. J. G. de Blok et al.

ASTRONOMICAL JOURNAL (2008)

Article Astronomy & Astrophysics

Mond and the universal rotation curve: Similar phenomenologies

Gianfranco Gentile

ASTROPHYSICAL JOURNAL (2008)

Article Physics, Multidisciplinary

Diffeomorphism invariance in the Hamiltonian formulation of General Relativity

N. Kiriushcheva et al.

PHYSICS LETTERS A (2008)

Article Astronomy & Astrophysics

Stability of spherically symmetric solutions in modified theories of gravity

Michael D. Seifert

PHYSICAL REVIEW D (2007)

Article Astronomy & Astrophysics

Gravitational polarization and the phenomenology of MOND

Luc Blanchet

CLASSICAL AND QUANTUM GRAVITY (2007)

Article Astronomy & Astrophysics

The rotation velocity attributable to dark matter at intermediate radii in disk galaxies

S. S. McGaugh et al.

ASTROPHYSICAL JOURNAL (2007)

Article Astronomy & Astrophysics

Modelling the Pioneer anomaly as modified inertia

M. E. McCulloch

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2007)

Article Engineering, Aerospace

Tests of the weak equivalence principle for charged particles in space

H. Dittus et al.

ADVANCES IN SPACE RESEARCH (2007)

Article Astronomy & Astrophysics

A direct empirical proof of the existence of dark matter

Douglas Clowe et al.

ASTROPHYSICAL JOURNAL (2006)

Article Astronomy & Astrophysics

Can MOND take a bullet? Analytical comparisons of three versions of MOND beyond spherical symmetry

G. W. Angus et al.

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY (2006)

Article Education, Scientific Disciplines

Study of the Pioneer anomaly: A problem set

SG Turyshev et al.

AMERICAN JOURNAL OF PHYSICS (2005)

Article Astronomy & Astrophysics

The mass discrepancy-acceleration relation: Disk mass and the dark matter distribution

SS McGaugh

ASTROPHYSICAL JOURNAL (2004)

Article Astronomy & Astrophysics

Relativistic gravitation theory for the modified Newtonian dynamics paradigm

JD Bekenstein

PHYSICAL REVIEW D (2004)

Article Astronomy & Astrophysics

Problems for modified Newtonian dynamics in clusters and the Lyα forest?

A Aguirre et al.

ASTROPHYSICAL JOURNAL (2001)