The angular correlation function of galaxies from early sloan digital sky survey data
作者： Andrew J. Connolly , Ryan Scranton , David Johnston , Scott Dodelson , Daniel J. Eisenstein
DOI: 10.1086/342787
关键词: Astrophysics 、 Redshift 、 Astronomy 、 Physics 、 Correlation function (astronomy) 、 Magnitude (mathematics) 、 Sky 、 Galaxy 、 Power law 、 Amplitude 、 Function (mathematics)
摘要: The Sloan Digital Sky Survey is one of the first multicolor photometric and spectroscopic surveys designed to measure statistical properties galaxies within local universe. In this paper we present some initial results on angular two-point correlation function measured from early SDSS galaxy data. form function, over magnitude interval 18 < r* 22, shown be consistent with existing wide-field, photographic-based narrower CCD surveys. On scales between 1' 1° well described by a power law an exponent ≈-0.7. amplitude interval, decreases fainter magnitudes in good agreement analysis There characteristic break approximately 1°-2°. small scales, θ 1', does not appear power-law fitted 05 With data set that less than 2% full survey area, have obtained high-precision measurements 1°, which are robust systematic uncertainties. Because limited area highly correlated nature error covariance matrix, these do yet provide definitive characterization departures at smaller larger angles. near future, however, imaging will sufficient allow detailed small- large-scale regimes, higher order correlations, studies clustering as redshift type.
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