Massive double compact object mergers: gravitational wave sources and r-process-element production sites

摘要: With our galactic evolutionary code that contains a detailed intermediate mass and massive binary population model, we study the temporal evolution of double neutron star binaries, mixed systems with black hole component binaries. We compute merger rates these relativistic binaries translate them into LIGO II detection rates. demonstrate accounting for uncertainties in relation 'initial mass-final mass' predicted by close due to possible effect large stellar wind loss during luminous blue variable phase initial larger than 30-40 Mo red supergiant smaller when such is component, rate may be very small, contrary predictions made other groups. Hydrodynamic computations r-process chemical yields ejected process have recently become available. includes it then straightforward calculate elements mergers. conclude except earliest Galaxy (~the first 100 Myr) compact mergers major production sites probable dominate this over