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We here present 0.02-0.04'' resolution ALMA observation of the compactobscured nucleus (CON) of IRAS17578-0400. A dusty torus within the nucleus,approximately 4 pc in radius, has been uncovered, exhibiting a usually flatspectral index at ALMA band 3, likely due to the millimeter corona emissionfrom the central supermassive black hole (SMBH). The dense gas disk, traced by$^{13}$CO(1-0), spans 7 pc in radius and suggests an outflow driven by a diskwind due to its asymmetrical structure along the minor axis. Collimatedmolecular outflows (CMO), traced by the low-velocity components of the HCN(3-2)and HCO$^+$(3-2) lines, align with the minor axis gas disk. Examination ofposition-velocity plots of HCN(3-2) and HCO$^+$(3-2) reveals a flared dense gasdisk extended a radius of $\sim$ 60 pc, infalling and rotating at speeds ofabout 200 km/s and 300 km/s, respectively. A centrifugal barrier, locatedaround 4 pc from the dynamical center, implies an SMBH mass of approximately10$^8$ $M_\odot$, consistent with millimeter corona emission estimates. The CMOmaintains a steady rotation speed of 200 km/s over the 100 pc scale along theminor axis. The projected speed of the CMO is about 80 km/s, corresponding toaround $\sim$ 500 km/s, assuming an inclination angle of 80$^\circ$. Such akinematics structure of disk-driven collimated rotating molecular outflow withgas supplies from a falling rotating disk indicates that the feedback of thecompact obscured nucleus is likely regulated by the momentum transfer of themolecular gas that connects to both the feeding of the nuclear starburst andsupermassive black hole.

5-12 pc resolution ALMA imaging of gas and dust in the obscured compact nucleus of IRAS 17578-0400