Models for superbursts from neutron stars involving carbon shell flashes predict that the mass accretion rate should be anywhere in excess of one tenth of the Eddington limit. Yet, superbursts have so far only been detected in systems for which the accretion rate is derived to be between 0.1 and 0.25 times that limit. The question arises whether

At high-z the most superdense massive galaxies are supposed to be the result of gas-rich mergers resulting in compact remnant. After this, dry mergers are expected to be the mechanism that moves these very massive galaxies towards the current stellar mass size relation. Within these merging scenarios, a non-negligible fraction (1-10%) of these

We investigate the evolution of supermassive black holes in the `Evolution and Assembly of GaLaxies and their Environments' (EAGLE) cosmological hydrodynamic simulations. The largest of the EAGLE volumes covers a (100 cMpc)3 and includes state-of-the-art physical models for star formation and black hole growth that depend only on local gas

IAUC 5123 available at Central Bureau for Astronomical Telegrams.

IAUC 5634 available at Central Bureau for Astronomical Telegrams. IAUC 5634 available at Central Bureau for Astronomical Telegrams.

IAUC 5129 available at Central Bureau for Astronomical Telegrams. IAUC 5129 available at Central Bureau for Astronomical Telegrams.