Photometric investigation of the rich supercluster fourteen fifty-one plus twenty-two
The morphological properties of the rich supercluster 1451 + 22 are investigated using photographic galaxy photometry in a two color system especially sensitive to redshift. By measuring approx. 125,000 galaxies in five Palomar Schmidt fields, the supercluster's shape, density profile, density contrast, and galaxy population are found. The data suggest that the structure of 1451 + 22 is that of a face-on pancake, flattened against the plane of the sky, although spherical models are not ruled out. Filaments rich in early type galaxies do exist, but most of the supercluster mass lies outside these regions. In addition, 1451 + 22 seems to exhibit a core-halo structure, with the central degree containing a much higher galaxy density and a larger percentage of elliptical and SO galaxies than the outer regions. If 1451 + 22 is flat, the mean luminosity density contrast of the supercluster over the field is rho/rho/sub field approx. 10, and the total mass of the system is probably M > 10/sup 16/ solar masses. If the supercluster is quasi-spherical, the observed density contrast is rho/rho/sub field/ approx. 5, implying a total mass to light ratio for the supercluster of (M/L)/sub solar/ approx. 130, and a cosmological density parameter omega approx. 0.3.
- Research Organization:
- California Univ., Los Angeles (USA)
- OSTI ID:
- 6984402
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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