Global anisotropy in galaxy orientations
نویسندگان
چکیده
منابع مشابه
Galaxy Clusters and Microwave Background Anisotropy
Previous estimates of the microwave background anisotropies produced by freely falling spherical clusters are discussed. These estimates are based on the Swiss-Cheese and Tolman-Bondi models. It is proved that these models give only upper limits to the anisotropies produced by the observed galaxy clusters. By using spherically symmetric codes including pressureless matter and a hot baryonic gas...
متن کاملGlobal azimuthal anisotropy in the transition zone.
Surface wave dispersion measurements for Love wave overtones carry evidence of azimuthal anisotropy in the transition zone of Earth's mantle (400 to 660 kilometers deep). A Backus-Gilbert inversion of anisotropic phase velocity maps, with resolution kernels mainly sensitive to the transition zone, shows a robust long-wavelength azimuthally anisotropic velocity structure. This observation puts n...
متن کاملGlobal regularities in integrated galaxy spectra
We have investigated some statistical properties of integrated spectra of galaxies from Kennicutt (1992a) spectrophotometric atlas. The input for the analysis are galaxy spectra sampled in 1300 bins between 3750 Å and 6500 Å. We make use of Principal Component Analysis (PCA) to analyse the 1300-dimensional space spanned by the spectra. Their projection onto the plane defined by the first two pr...
متن کاملPreferred Orientations and Anisotropy in Shales: Callovo-oxfordian Shale (france) and Opalinus Clay (switzerland)
Anisotropy in clay-rich sedimentary rocks is receiving increasing attention. Seismic anisotropy is essential in the prospecting for petroleum deposits. Anisotropy of diffusion has become relevant for environmental contaminants, including nuclear waste. In both cases, the orientation of component minerals is a critical ingredient and, largely because of small grain size and poor crystallinity, t...
متن کاملGlobal environmental effects versus galaxy interactions
We explore properties of close galaxy pairs and merging systems selected from the SDSS-DR4 in different environments with the aim to assess the relative importance of the role of interactions over global environmental processes. For this purpose, we perform a comparative study of galaxies with and without close companions as a function of local density and host-halo mass, carefully removing sou...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1994
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/268.3.665