Signatures Of Inhomogeneities Research Articles

Testing homogeneity in the Sloan Digital Sky Survey Data Release Twelve with Shannon entropy

We analyze a set of volume limited samples from SDSS DR12 to quantify the degree of inhomogeneity at different length scales using Shannon entropy. We find that the galaxy distributions exhibit a higher degree of inhomogeneity as compared to a Poisson point process at all length scales. Our analysis indicates that signatures of inhomogeneities in the galaxy distributions persist at least upto a length scale of $120 \, h^{-1}\, {\rm Mpc}$. The galaxy distributions appear to be homogeneous on a scale of $140 \, h^{-1}\, {\rm Mpc}$ and beyond. Analyzing a set of mock galaxy samples from a semi analytic galaxy catalogue from the Millennium simulation we find a scale of transition to homogeneity at $\sim 100 \, h^{-1}\, {\rm Mpc}$.

Magnetocapacitance in Nonmagnetic Composite Media

The dielectric response in a magnetic field is routinely used to probe the existence of coupled magnetic and elastic order in the multiferroics. However, here we demonstrate that magnetism is not necessary to produce a magnetocapacitance when the material is inhomogeneous. By considering a two-dimensional, two-component composite medium, we find a characteristic dielectric resonance that depends on magnetic field. We propose this as a possible signature of inhomogeneities and we argue that this behavior has already been observed in nanoporous silicon and some manganites.

Signatures of Inhomogeneity in the Early Universe: Erratum

Signatures of Inhomogeneity in the Early Universe: Erratum

Signatures of inhomogeneity in the early universe

view Abstract Citations (51) References (23) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Signatures of Inhomogeneity in the Early Universe Kawano, Lawrence H. ; Fowler, William A. ; Kavanagh, Ralph W. ; Malaney, Robert A. Abstract The production of elemental CNO in inhomogeneous nucleosynthesis is systematically studied for a much larger region of parameter space than ever before. The Li-7(n, gamma)Li-8(alpha, n)B-11 channel is shown to be the dominant path to CNO production in regions of parameter space in which there is significant CNO production. It is shown that this finding is a clear signal of an inhomogeneous Omega(b) = about 1 universe. Publication: The Astrophysical Journal Pub Date: May 1991 DOI: 10.1086/169948 Bibcode: 1991ApJ...372....1K Keywords: Evolution (Development); Nuclear Astrophysics; Nuclear Fusion; Universe; Astronomical Models; Carbon; Inhomogeneity; Nitrogen; Oxygen; Astrophysics; ABUNDANCES; EARLY UNIVERSE; NUCLEOSYNTHESIS full text sources ADS | Related Materials (1) Erratum: 1991ApJ...382..358K