Orientations, ellipticities and nearest-neighbor correlations in rich clusters of galaxies
β Scribed by M.P. Ulmer; S.L.W. McMillan; M.P. Kowalski
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 226 KB
- Volume
- 10
- Category
- Article
- ISSN
- 0273-1177
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## Abstract Using photometric data from SDSS survey we study the galaxy luminosity function in the 75 rich and poor Abell clusters. The integrated Schechter functions were fitted to unbinned data in the four __g__, __r__, __i__, and __z__ photometric passbands. We find that the luminosity function
For multivariate data sets, we study the relationship between the connectivity of a mutual k-nearest-neighbor graph, and the presence of clustering structure and outliers in the data. A test for detection of clustering structure and outliers is proposed and its performance is evaluated in simulated