Paper:	Spatial Distribution of CO Isotopologue Abundance Ratios in the Center of NGC 1068
Volume:	499, Revolution in Astronomy with ALMA: The Third Year
Page:	107
Authors:	Taniguchi, A.; Kohno, K.; Tamura, Y.; Izumi, T.; Takano, S.; Nakajima, T.; Tosaki, T.
Abstract:	We present an initial result of the spatial distribution of [12CO]/[13CO] and [C16O]/[C18O] abundance ratios in the central ∼1 kpc region of the nearby Seyfert 2 galaxy NGC 1068 observed with ALMA Cycle 0. With non-LTE analyses, both ratios are found to be different between the central circumnuclear disk (CND) and surrounding starburst ring (the Ring). The very high (∼300–1000) value may reflects the difference of chemical evolution and environment at the Ring.

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