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- W2765652242 endingPage "1360" @default.
- W2765652242 startingPage "1342" @default.
- W2765652242 abstract "We perform a detailed study of the location of brightest cluster galaxies (BCGs) on the Fundamental Plane of black hole (BH) accretion, which is an empirical correlation between a BH X-ray and radio luminosity and mass supported by theoretical models of accretion. The sample comprises 72 BCGs out to z ∼ 0.3 and with reliable nuclear X-ray and radio luminosities. These are found to correlate as |$L_mathrm{X} propto L_mathrm{R}^{0.75 pm 0.08}$|, favouring an advection-dominated accretion flow as the origin of the X-ray emission. BCGs are found to be on average offset from the Fundamental Plane such that their BH masses seem to be underestimated by the MBH–MK relation a factor ∼10. The offset is not explained by jet synchrotron cooling and is independent of emission process or amount of cluster gas cooling. Those core-dominated BCGs are found to be more significantly offset than those with weak core radio emission. For BCGs to on average follow the Fundamental Plane, a large fraction ( ∼ 40 per cent) should have BH masses >1010 M⊙ and thus host ultramassive BHs. The local BH–galaxy scaling relations would not hold for these extreme objects. The possible explanations for their formation, either via a two-phase process (the BH formed first, the galaxy grows later) or as descendants of high-z seed BHs, challenge the current paradigm of a synchronized galaxy–BH growth." @default.
- W2765652242 created "2017-11-10" @default.
- W2765652242 creator A5039036049 @default.
- W2765652242 creator A5056567141 @default.
- W2765652242 creator A5064328569 @default.
- W2765652242 creator A5073329735 @default.
- W2765652242 creator A5076490501 @default.
- W2765652242 creator A5082575274 @default.
- W2765652242 date "2017-10-30" @default.
- W2765652242 modified "2023-10-11" @default.
- W2765652242 title "The most massive black holes on the Fundamental Plane of black hole accretion" @default.
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