Structure and evolution of high-mass stellar mergers

Mergers of accreting stellar-mass black holes

We present post-Newtonian N -body simulations on mergers of accreting stellarmass black holes (BHs), where such general relativistic effects as the pericentre shift and gravitational wave emission are taken into consideration. To elucidate the key physics that regulates mergers of BHs, the dynamical friction and the mass accretion by ambient gas are incorporated. We consider a system composed o...

Stellar Structure and Evolution

Electromagnetic Signals following Stellar–mass Black Hole Mergers

It is often assumed that gravitational wave (GW) events resulting from the merger of stellar– mass black holes are unlikely to produce electromagnetic (EM) counterparts. We point out that the progenitor binary has probably shed a mass & 10 M during its prior evolution. If a tiny fraction of this gas is retained until the merger, the recoil and sudden mass loss of the merged black hole shocks an...

The evolution of the stellar mass versus halo mass relationship

We present an analysis of the predictions made by the GALFORM semi-analytic galaxy formation model for the evolution of the relationship between stellar mass and halo mass. We show that for the standard implementations of supernova feedback and gas reincorporation used in semianalytic models, this relationship is predicted to evolve weakly over the redshift range 0 < z < 4. Modest evolution in ...

Stellar interiors - physical principles, structure, and evolution

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