AGN-driven Cold Gas Outflow of NGC 1068 Characterized by Dissociation-sensitive Molecules

Recent developments in (sub-)millimeter facilities have drastically changed the amount of information obtained from extragalactic spectral scans. In this paper, we present a feature extraction technique using principal component analysis (PCA) applied to arcsecond-resolution (1.0-2.0 arcsec = 72-144 pc) scan datasets for nearby type-2 Seyfert galaxy, NGC 1068, Band 3 Atacama Large Millimeter/submillimeter Array. We apply PCA 16 well-detected molecular line intensity maps convolved common 150 pc resolution. addition, include [SIII]/[SII] ratio and [CI] $^3P_1$-$^3P_0$ literature, both whose distributions show remarkable resemblance with that kpc-scale biconical outflow central AGN. identify two prominent features: (1) concentration at circumnuclear disk (CND) (2) peaks across center coincide peaks. The concentrated lines CND are mostly high-dipole molecules (e.g., H$^{13}$CN, HC$_3$N, HCN). Line emissions known be enhanced irradiated interstellar medium, CN, C$_2$H, HNC, similar concentrations extended components along bicone, suggesting molecule dissociation is dominant chemical effect cold galaxy. Although further investigation should made, scenario consistent faintness or absence emission CO isotopologues, CH$_3$OH, N$_2$H$^+$, outflow, which easily destroyed by dissociating photons electrons.