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

We study radio and X-ray emissions from IMBHs and explore the unified modelfor accretion and ejection processes. The radio band survey of IMBH (candidate)hosted galaxies indicates that only a small fraction ($\sim$0.6\%) of them areradio-band active. In addition, very long baseline interferometry observationsreveal parsec-scale radio emission of IMBHs, further resulting in a lowerfraction of actively ejecting objects (radio emission is produced by IMBHsother than hosts), which is consistent with a long quiescent state in theevolution cycle of IMBHs. Most (75\%, i.e., 3 out of 4 samples according to arecent mini-survey) of the radio-emitting IMBHs are associated with radiorelics and there is also evidence of dual radio blobs from episodic ejectingphases. Taking the radio emission and the corresponding core X-ray emission ofIMBH, we confirm a universal fundamental plane relation (FMP) of black holeactivity. Furthermore, state transitions can be inferred by comparing a fewcases in XRBs and IMBHs in FMP, i.e., both radio luminosity and emissionregions evolve along these state transitions. These signatures and evidencesuggest an analogy among all kinds of accretion systems which span from stellarmass to supermassive black holes, hinting at unified accretion and ejectionphysics. To validate the unified model, we explore the correlation between thescale of outflows (corresponding to ejection powers) and the masses of centralengines; it shows that the largest scale of outflows $\hat{LS}_\mathrm{out}$follows a power-law correlation with the masses of accretors $M_\mathrm{core}$,i.e., $\log{\hat{LS}_\mathrm{out}} = (0.73\pm0.01)\log{M_\mathrm{core}} -(3.34\pm0.10)$. In conclusion, this work provides evidence to support the claimthat the ejection (and accretion) process behaves as scale-invariant and theirpower is regulated by the masses of accretors.

Intermediate-Mass Black Holes: The Essential Population to Explore the Unified Model for Accretion and Ejection Processes