Identification of Extremely Large Scale Structures in SDSS-III

Bagchi, J.; Sahni, V.; SANKHYAYAN, SHISHIR; Jacob, J.; Sarkar, P.

Identification of Extremely Large Scale Structures in SDSS-III

SANKHYAYAN, SHISHIR; Bagchi, J.; Sarkar, P.; Sahni, V.; Jacob, J.

URI: http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/5524 https://www.cambridge.org/core/journals/proceedings-of-the-international-astronomical-union/article/identification-of-extremely-large-scale-structures-in-sdssiii/D8CD4AC95F4BB510B8DC16515D1A94EF Date: 2016-10

Abstract:

We have initiated the search and detailed study of large scale structures present in the universe using galaxy redshift surveys. In this process, we take the volume-limited sample of galaxies from Sloan Digital Sky Survey III and find very large structures even beyond the redshift of 0.2. One of the structures is even greater than 600 Mpc which raises a question on the homogeneity scale of the universe. The shapes of voids-structures (adjacent to each other) seem to be correlated, which supports the physical existence of the observed structures. The other observational supports include galaxy clusters' and QSO distribution's correlation with the density peaks of the volume limited sample of galaxies.

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