Limits on Buried Energy Sources in Local Infrared-luminous Galaxies

28 May 2020

Emission from vibrationally excited HCN molecules (HCN-VIB) is a powerful probe of highly dust-obscured and luminous energy sources. We have recently completed a search for HCN-VIB emission in four galaxies which showed the potential for hosting buried, accreting supermassive black holes. In “Limits on Vibrationally Excited HCN Emission in Four HCN-enhanced GOALS Galaxies” (Jeff+) we present the non-detections and upper limits for the HCN-VIB emission. These measurements were used in Privon+2020 (in conjunction with NuSTAR X-ray observations) to place limits on the potential contribution of AGN to the bolometric luminosity of each galaxy.