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

Powering the 10^62 erg nuclear outburst in the MS0735.6+7421 cluster centralgalaxy by accretion implies that its supermassive black hole (SMBH) grew by~6x10^8 solar masses over the past 100 Myr. We place upper limits on the amountof cold gas and star formation near the nucleus of <10^9 solar masses and <2solar masses per year, respectively. These limits imply that an implausiblylarge fraction of the preexisting cold gas in the bulge must have been consumedby its SMBH at the rate of ~3-5 solar masses per year while leaving no trace ofstar formation. Such a high accretion rate would be difficult to maintain bystellar accretion or the Bondi mechanism, unless the black hole mass approaches10^11 solar masses. Its feeble nuclear luminosities in the UV, I, and X-raybands compared to its enormous mechanical power are inconsistent with rapidaccretion onto a ~5x10^9 solar mass black hole. We suggest instead that the AGNoutburst is powered by a rapidly-spinning black hole. A maximally-spinning,10^9 solar mass black hole contains enough rotational energy, ~10^62 erg, toquench a cooling flow over its lifetime and to contribute significantly to theexcess entropy found in the hot atmospheres of groups and clusters. Two modesof AGN feedback may be quenching star formation in elliptical galaxies centeredin cooling halos at late times. An accretion mode that operates in gas-richsystems, and a spin mode operating at modest accretion rates. The spinconjecture may be avoided in MS0735 by appealing to Bondi accretion onto acentral black hole whose mass greatly exceeds 10^10 solar mass. The hostgalaxy's unusually large, 3.8 kpc stellar core radius (light deficit) maywitness the presence of an ultramassive black hole.

An Energetic AGN Outburst Powered by a Rapidly Spinning Supermassive Black Hole or an Accreting Ultramassive Black Hole