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Search: authors:"Hai-Nan Lin"

4 papers found.
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Finslerian dipolar modulation of the CMB power spectra at scales \(2<l<600\)

A common explanation for the CMB power asymmetry is to introduce a dipolar modulation at the stage of inflation, where the primordial power spectrum is spatially varying. If the universe in the stage of inflation is Finslerian, and if the Finsler spacetime is non-reversible under parity flip, \(x\rightarrow -x\), then a three dimensional spectrum which is a function of wave vector ...

A unified description for dipoles of the fine-structure constant and SnIa Hubble diagram in Finslerian universe

We propose a Finsler spacetime scenario of the anisotropic universe. The Finslerian universe requires both the fine-structure constant and the accelerating cosmic expansion to have a dipole structure and the directions of these two dipoles to be the same. Our numerical results show that the dipole direction of the SnIa Hubble diagram locates at \((l,b)=(314.6^\circ \pm 20.3^\circ ...

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 note that the Finsler–Randers spacetime provides an appropriate framework for the anisotropic cosmology. By adding an arbitrary 1-form to the Friedmann–Robertson–Walker line element, a ...

Finslerian MOND versus observations of Bullet Cluster 1E 0657−558

It is known that theory of MOND (Modification of Newtonian Dynamics) with spherical symmetry cannot account for the convergence κ-map of Bullet Cluster 1E 0657−558. In this paper, we try to set up a Finslerian MOND, a generalization of MOND in Finsler space–time. We use Ric = 0 to obtain the gravitational vacuum field equation in a 4D Finsler space–time. To leading order in the ...