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The Angular Correlation Function of Faint Galaxies during the Decreasing Correlation Period

Published online by Cambridge University Press:  25 May 2016

Tomoya Ogawa ,
Boudewijn F. Roukema  and
Kazuyuki Yamashita
Tomoya Ogawa
Affiliation:
Graduate School of Science and Technology, Chiba Univ., Japan
Boudewijn F. Roukema
Affiliation:
Observatoire Astronomique de Strasbourg, France
Kazuyuki Yamashita
Affiliation:
Information Processing Center, Chiba Univ., Japan

Extract

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During the period of galaxy formation, many small-length-scale perturbations superimposed on high-amplitude large-length-scale perturbations should have their overdensities boosted into the non-linear regime, while small-scale perturbations in other regions remain linear. The formation of the first galaxies in discrete, high overdensity regions may lead to an initial amplitude of the spatial correiatio? function of galaxies, ξ0, much higher than that expected from linear fluctuation theory. This initially high “bias” would consequently decrease to the near-unity values expected from local observations. Such a Decreasing Correlation Period (DCP) is detected in N-body simulations under certain conditions by several authors; Roukema (1993), Brainerd & Villumsen (1994), Roukema et al. (1997) and unpublished simulations by one of us (Yamashita).

Type
IV. Structure Formation and Dark Matter
Information
Symposium - International Astronomical Union , Volume 183: Cosmological Parameters and the Evolution of the Universe , 1999 , pp. 260
Copyright
Copyright © Kluwer 1999 

References

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