TERRAPUB Earth, Planets and Space

Earth Planets Space, Vol. 62 (No. 2), pp. 215-221, 2010

Simulation of heterogeneity sections obtained by neutrino radiography

Nozomu Takeuchi

Earthquake Research Institute, University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo 113-0032, Japan

(Received November 18, 2008; Revised April 22, 2009; Accepted May 1, 2009; Online published February 22, 2010)

Abstract: Heterogeneity sections potentially observed by neutrino radiography are simulated by using S-velocity tomography models. All of the velocity heterogeneities in these models are assumed to be of thermal origin, and the velocity anomalies are translated into density anomalies by using the scaling relations obtained from previous laboratory experiments. Assuming the use of the IceCube Neutrino Detector, the density anomalies were integrated along the paths to this detector. Five tomography models were tested, but the obtained sections show common features: paths sampling the CMB region beneath Africa and paths sampling the root of East Antarctica are anomalous. Previous studies suggested that these two regions may be chemically distinct. Approximate order estimations suggest that if these regions have 10% density anomalies, IceCube will detect them in about 300 years.
Key words: Earth's interior, seismic tomography, neutrino radiography.

Corresponding author E-mail: takeuchi@eri.u-tokyo.ac.jp

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