English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

What determines the nuclear radio emission in local galaxies? We combineoptical [O III] line emission, robust black hole (BH) mass estimates, andhigh-resolution e-MERLIN 1.5-GHz data, from the LeMMINGs survey, of astatistically-complete sample of 280 nearby, optically active (LINER andSeyfert) and inactive HII and Absorption line galaxies [ALG]) galaxies. Using[O III] luminosity ($L_{\rm [O~III]}$) as a proxy for the accretion power,local galaxies follow distinct sequences in the optical-radio planes of BHactivity, which suggest different origins of the nuclear radio emission for theoptical classes. The 1.5-GHz radio luminosity of their parsec-scale cores($L_{\rm core}$) is found to scale with BH mass ($M_{\rm BH}$) and [O~III]luminosity. Below $M_{\rm BH} \sim$10$^{6.5}$ M$_{\odot}$, stellar processesfrom non-jetted HII galaxies dominate with $L_{\rm core} \propto M_{\rmBH}^{0.61\pm0.33}$ and $L_{\rm core} \propto L_{\rm [O~III]}^{0.79\pm0.30}$.Above $M_{\rm BH} \sim$10$^{6.5}$ M$_{\odot}$, accretion-driven processesdominate with $L_{\rm core} \propto M_{\rm BH}^{1.5-1.65}$ and $L_{\rm core}\propto L_{\rm [O~III]}^{0.99-1.31}$ for active galaxies: radio-quiet/loudLINERs, Seyferts and jetted HII galaxies always display (although low)signatures of radio-emitting BH activity, with $L_{\rm 1.5\,GHz}\gtrsim$10$^{19.8}$ W Hz$^{-1}$ and $M_{\rm BH}\gtrsim10^{7}$ M$_{\odot}$,on a broad range of Eddington-scaled accretion rates ($\dot{m}$). Radio-quietand radio-loud LINERs are powered by low-$\dot{m}$ discs launchingsub-relativistic and relativistic jets, respectively. Low-power slow jets anddisc/corona winds from moderately high to high-$\dot{m}$ discs account for thecompact and edge-brightened jets of Seyferts, respectively. Jetted HII galaxiesmay host weakly active BHs. Fuel-starved BHs and recurrent activity account forALG properties. [abridged]

monthly notices of the royal astronomical society

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