LeMMINGs III. The e-MERLIN legacy survey of the Palomar sample: exploring the origin of nuclear radio emission in active and inactive galaxies through the [O III] - radio connection
What determines the nuclear radio emission in local galaxies? To address this question, we combine optical [O III] line emission, robust black hole (BH) mass estimates, and high-resolution e-MERLIN 1 .5-GHz data, from the LeMMINGs survey, of a statistically complete sample of 280 nearby optically ac...
| Autores: | , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2021 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/4924 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/4924 |
| Access Level: | acceso abierto |
| Palabra clave: | 52 Black-hole mass Advection-dominated accretion X-ray binaries Host galaxy/agn connection Dwarf seyfert nuclei Loud/radio-quiet dichotomy Jet production efficiency Star-forming galaxies Galactic nuclei Vla observations Astrofísica |
| Sumario: | What determines the nuclear radio emission in local galaxies? To address this question, we combine optical [O III] line emission, robust black hole (BH) mass estimates, and high-resolution e-MERLIN 1 .5-GHz data, from the LeMMINGs survey, of a statistically complete sample of 280 nearby optically active (LINER and Seyfert) and inactive [H II and absorption line galaxies (ALGs)] galaxies. Using [O III] luminosity (L-[o iii]) as a proxy for the accretion power, local galaxies follow distinct sequences in the optical-radio planes of BH activity, which suggest different origins of the nuclear radio emission for the optical classes. The 1 .5-GHz radio luminosity of their parsec-scale cores (L-core) is found to scale with BH mass (M-BH) and [O III] luminosity. Below M-BH similar to 10(6.5 )M(circle dot), stellar processes from non-jetted H II galaxies dominate with (Lcore) proportional to M(BH)(0.61 +/- 0.33 )and L-core proportional to L-[Oiii](0.79 +/- 0.30). Above M-BH similar to 10(6.5 )M(circle dot), accretion-driven processes dominate with L-core proportional to M(BH)(1.5-1.65 )and L-core proportional to L-[Oiii](0.99-1.31) for active galaxies: radio-quiet/loud LINERs, Seyferts, and jetted H II galaxies always display (although low) signatures of radio-emitting BH activity, with L-1.5GHz greater than or similar to 10(19.8) W Hz(-1) and M-BH greater than or similar to 10(7) M-circle dot, on a broad range of Eddington-scaled accretion rates ((m)over dot). Radio-quiet and radio-loud LINERs are powered by low-(m)over dot discs launching sub-relativistic and relativistic jets, respectively. Low-power slow jets and disc/corona winds from moderately high to high-(m)over dot discs account for the compact and edge-brightened jets of Seyferts, respectively. Jetted H II galaxies may host weakly active BHs. Fuel-starved BHs and recurrent activity account for ALG properties. In conclusion, specific accretion-ejection states of active BHs determine the radio production and the optical classification of local active galaxies. |
|---|