[[UTAPwiki/セミナー/初期宇宙・相対論速報]] Daisuke Yamauchi, TBA Speaker: Daisuke Yamauchi Title: ``Constraining non-Gaussianity with multi-tracer technique" Abstract: We evaluate accuracy on nonlinear parameter with SKA continuum and Euclid surveys via multi-tracer technique. Performing a Fisher matrix analysis, we show that the availability of multiple biased tracers drastically improves measurement of nonlinear parameter. When we split whole samples into 5 subsamples, we obtain the constraint of \sigma(f_{NL})<O(1). |