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We report on the result of our high quality spectropolarimetric observationfor the narrow-line region in a nearby Seyfert 2 galaxy, Mrk 573, by the SubaruTelescope. The polarized flux spectrum of Mrk 573 shows not only prominentscattered broad H$\alpha$ emission but also various narrow forbidden emissionlines. We find that the measured polarization degree of the observed forbiddenemission lines is positively correlated with the ionization potential of thecorresponding ions and the critical density of the corresponding transitions.We discuss some possible origins of these correlations, and then we point outthat the correlations are caused due to the obscuration of the stratifiednarrow-line region in Mrk 573 by the optically and geometrically thick dustytorus, just similar to the previous study on NGC 4258.Comment: 10 pages including 8 figures, to appear in The Astronomical Journa

Subaru Spectropolarimetry of Markarian 573: The Hidden High-Ionization Nuclear Emission-Line Region inside the Dusty Torus