Searching for a cosmological preferred direction with 147 rotationally supported galaxies

@article{Zhou2017SearchingFA,
  title={Searching for a cosmological preferred direction with 147 rotationally supported galaxies},
  author={Yong Zhou and Zhi-Chao Zhao and Zhe Chang},
  journal={arXiv: Cosmology and Nongalactic Astrophysics},
  year={2017}
}
It is well known that the Milgrom's MOND (modified Newtonian dynamics) explains well the mass discrepancy problem in galaxy rotation curves. The MOND predicts a universal acceleration scale below which the Newtonian dynamics is invalid yet. The universal acceleration scale we got from the SPARC dataset is $g_†=1.02\times10^{-10} \rm m~s^{-2}$. Milgrom suggested that the acceleration scale may be a fingerprint of cosmology on local dynamics and related with the Hubble constant $g_†\sim cH_0$. In… 

Figures from this paper

Searching for a possible dipole anisotropy in acceleration scale with 147 rotationally supported galaxies
We report a dipole anisotropy on acceleration scale $g_{\dag}$ in local universe with 147 rotationally supported galaxies. We find that a monopole and dipole correction for the radial acceleration
Is there a fundamental acceleration scale in galaxies?
Milgrom's modified Newtonian dynamics (MOND) can explain well the mass discrepancy problem in galaxy without invoking dark matter. The MOND theory predicts a universal constant acceleration scale in
Testing cosmic anisotropy with Pantheon sample and quasars at high redshifts
In this paper, we investigate the cosmic anisotropy from the SN-Q sample, consisting of the Pantheon sample and quasars, by employing the hemisphere comparison (HC) method and the dipole fitting (DF)
Probing the universality of acceleration scale in modified Newtonian dynamics with SPARC galaxies
We probe the universality of acceleration scale in Milgrom's modified Newtonian dynamics (MOND) using the recently released rotation curve data from SPARC galaxies. We divide the SPARC data into
Anisotropy of the Universe via the Pantheon supernovae sample revisited
We employ the hemisphere comparison (HC) method and the dipole fitting (DF) method to investigate the cosmic anisotropy in the recently released Pantheon sample of type Ia supernovae (SNe Ia) and
The radial acceleration relation in galaxy clusters
Recently, the discovery of the radial acceleration relation (RAR) in galaxies has been regarded as an indirect support of alternative theories of gravity such as modified Newtonian dynamics (MOND)
Constraining the anisotropy of the Universe with the Pantheon supernovae sample
We test the possible dipole anisotropy of the Finslerian cosmological model and the other three dipole-modulated cosmological models, i.e. the dipole-modulated ΛCDM, wCDM and
Testing the cosmic anisotropy with supernovae data: Hemisphere comparison and dipole fitting
The cosmological principle is one of the cornerstones in modern cosmology. It assumes that the universe is homogeneous and isotropic on cosmic scales. Both the homogeneity and the isotropy of the
Cosmic anisotropy and fast radio bursts
In the recent years, the field of fast radio bursts (FRBs) is thriving and growing rapidly. It is of interest to study cosmology by using FRBs with known redshifts. In the present work, we try to
...
...

References

SHOWING 1-10 OF 46 REFERENCES
Constraining anisotropy of the universe from different groups of type-Ia supernovae
Recently released Planck data and other astronomical observations show that the universe may be anisotropic on large scales. Inspired by this, anisotropic cosmological models have been proposed. We
Constraining the anisotropy of the universe from supernovae and gamma-ray bursts
Recently, an anisotropic cosmological model was proposed. An arbitrary one-form, which picks out a privileged axis in the universe, was added to the Friedmann Robertson Walker (FRW) line element. The
Effects of spacetime anisotropy on the galaxy rotation curves
The observations on galaxy rotation curves show significant discrepancies from the Newtonian theory. This issue could be explained by the effect of the anisotropy of the spacetime. Conversely, the
THINGS about MOND
We present an analysis of 12 high-resolution galactic rotation curves from The HI Nearby Galaxy Survey (THINGS) in the context of modified Newtonian dynamics (MOND). These rotation curves were
Milky Way Mass Models and MOND
Using the Tuorla-Heidelberg model for the mass distribution of the Milky Way, I determine the rotation curve predicted by MOND (modified Newtonian dynamics). The result is in good agreement with the
TESTING MODIFIED NEWTONIAN DYNAMICS WITH ROTATION CURVES OF DWARF AND LOW SURFACE BRIGHTNESS GALAXIES
Dwarf and low surface brightness (LSB) galaxies are ideal objects to test modified Newtonian dynamics (MOND), because in most of these galaxies the accelerations fall below the threshold where MOND
Searching for a Cosmological Preferred Axis: Union2 Data Analysis and Comparison with Other Probes
We review, compare and extend recent studies searching for evidence for a preferred cosmological axis. We start from the Union2 SnIa dataset and use the hemisphere comparison method to search for a
Rings and shells of "dark matter'' as mond artifacts
MOND predicts that a mass, M, contained within its transition radius, r(t) equivalent to ( MG/a(0))(1/2), may exhibit a feature at about that radius in the form of a shell, or projected ring, in the
(An)isotropy of the Hubble diagram: comparing hemispheres
Aims. We test the isotropy of the Hubble diagram. At small redshifts, this is possible without assumptions on the cosmic inventory and provides a fundamental test of the cosmological principle. At
...
...