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Identification of Extremely Large Scale Structures in SDSS-III

Published online by Cambridge University Press:  12 October 2016

Shishir Sankhyayan
Affiliation:
Indian Institute of Science Education and Research, Pune, India email: shishir.sankhyayan@students.iiserpune.ac.in
J. Bagchi
Affiliation:
Inter University Center for Astronomy and Astrophysics, Pune, India
P. Sarkar
Affiliation:
Tata Institude of Fundamental Research, Mumbai, India
V. Sahni
Affiliation:
Inter University Center for Astronomy and Astrophysics, Pune, India
J. Jacob
Affiliation:
Newman College, Kerela, India
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Abstract

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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.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2016 

References

Hao, J., McKay, T. A., Koester, B. P., et al. 2010, ApJS, 191, 254 Google Scholar