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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The origin of the dichotomy of radio loudness among quasars can be explainedusing recent findings that the mass of the central supermassive black hole(SMBH) in extended radio-loud quasars is systematically a few times that oftheir counterparts in radio-quiet quasars. This sensitive dependence of radiojet ejection upon SMBH mass probably arises from the blockage of jets by thepresence of substantial quantities of gas tidally stripped from stars by thecentral BH. This disruptive gas, however, will only be available around BHswith masses less than $M_c ~\gtrsim ~10^8\Msun$, for which the tidal disruptionradius lies outside the SMBH's event horizon. Consequently, we find that AGNwith $M_{BH} > M_c$ can successfully launch jets with a wide range of powers,thus producing radio-loud quasars. The great majority of jets launched by lessmassive BHs, however, will be truncated in the vicinity of the SMBH due to massloading from this stellar debris. This scenario also can naturally explain theremarkable dearth of extended radio structures in quasars showing broadabsorption line spectra.

Stellar Disruption and the Quasar Radio Dichotomy