منابع مشابه
K - band Galaxy Counts
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We present an analytical model which reproduces measured galaxy number counts from surveys in the wavelength range of 500 μm to 2 mm. The model involves a single high-redshift galaxy population with a Schechter luminosity function which has been gravitationally lensed by galaxy clusters in the mass range 10 to 10M⊙. This simple model reproduces both the low flux and the high flux end of the num...
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– Fractal properties are usually characterized by means of various statistical tools which deal with spatial average quantities. Here we focus on the determination of fluctuations around the average counts and we develop a test for the study of galaxy distribution both in redshift and magnitude space. Fluctuations in the counts of galaxies, in a fractal distribution, are of the same order of th...
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The Hubble Deep Field (HDF) offers the best view to date of the optical sky at faint magnitudes and small angular scales. Early reports suggested that faint source counts continue to rise to the completeness limit of the data. In this letter, we investigate the possibility that some of these sources are in fact giant HII regions or merger fragments within the same galaxy, rather than individual...
متن کاملGalaxy number counts and Fractal correlations
– We report the correlation analysis of various redshift surveys which shows that the available data are consistent with each other and manifest fractal correlations (with dimension D ≃ 2) up to the present observational limits (≈ 150hMpc) without any tendency towards homogenization. This result points to a new interpretation of the number counts that represents the main subject of this letter....
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 1984
ISSN: 0252-9211
DOI: 10.1017/s0252921100107110