Probing the Jet–Torus Interaction in the Radio Galaxy NGC 1052 by Sulfur-bearing Molecules
Metadatos
Mostrar el registro completo del ítemAutor
Kameno, Seiji; Sawada-Satoh, Satoko; Impellizzeri; Kohno, Kotaro; Martín, Sergio; Espada Fernández, Daniel; Nakai, Naomasa; Sugai, Hajime; Terashima, Yuichi; Lee, Minju M.Editorial
Institute of Physics
Fecha
2023-02-20Referencia bibliográfica
Seiji Kameno... [et al.]. 2023 ApJ 944 156. [https://doi.org/10.3847/1538-4357/acb499]
Patrocinador
Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT) Japan Society for the Promotion of Science; Grants-in-Aid for Scientific Research (KAKENHI) 18K03712 21H01137 19K03918 17H06130; Ministry of Science and Innovation, Spain (MICINN); Spanish Government BG20/00224 MCIN/AEI PID2020-114414GB-100 ID2020-113689GB-I00; Junta de Andalucia P20_00334; FEDER/Junta de Andalucia-Consejeria de TransformacionEconomica, Industria, Conocimiento y Universidades A-FQM-510-UGR20Resumen
The radio galaxy NGC 1052 casts absorption features of sulfur-bearing molecules, H2S, SO, SO2, and CS toward
the radio continuum emission from the core and jets. Using the Atacama Large Millimeter/submillimeter Array,
we have measured the equivalent widths of SO absorption features in multiple transitions and determined the
temperatures of 344 ± 43 K and 26 ± 4 K in submillimeter and millimeter wavelengths, respectively. Since
submillimeter and millimeter continuum represents the core and jets, the high and low temperatures of the
absorbers imply a warm environment in the molecular torus and cooler downstream flows. The high temperature in
the torus is consistent with the presence of 22 GHz H2O maser emission, vibrationally excited HCN and HCO+
absorption lines, and sulfur-bearing molecules in the gas phase released from dust. The origin of the sulfur-bearing
gas is ascribed to the evaporation of the icy dust component through a jet–torus interaction. Shock heating is the
sole plausible mechanism to maintain such a high temperature of gas and dust in the torus. The implication of the
jet–torus interaction also supports the collimation of the sub-relativistic jets by the gas pressure of the torus.