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Full-Text Articles in Physical Sciences and Mathematics
Dance Of Two Supermassive Binary Black Holes, Karishma Bansal
Dance Of Two Supermassive Binary Black Holes, Karishma Bansal
Shared Knowledge Conference
Black holes exist in a various range of masses ranging from stellar mass (~ 10 Solar Mass) to Supermassive black holes (SMBHs, million to billion Solar Mass). It is expected that as the separation between the black holes decreases, emission of gravitational waves will grow stronger, which makes binary black holes one of the most promising sources for gravitational radiation detection. Gravitational waves from merging stellar-mass black holes have recently been discovered by LIGO; however, we are yet to detect them from binary SMBHs. These massive black holes reside at the heart of most of the galaxies and when two …
Nonthermal Dark Matter From Early Matter Domination, Jacek Ksawery Osinski
Nonthermal Dark Matter From Early Matter Domination, Jacek Ksawery Osinski
Shared Knowledge Conference
Dark matter (DM) production in the early universe traditionally assumes a standard thermal history where the universe is in a radiation-dominated phase after the end of inflation until matter-radiation equality. However, the presence of additional scalar fields (which is a generic prediction of explicit string constructions) can lead to an epoch of early matter domination (EMD) that ends before the onset of big bang nucleosynthesis. Such an EMD phase has important cosmological consequences and renders thermal production of DM irrelevant. We present three scenarios for DM production involving an era of EMD: evaporation of primordial black holes into DM, DM …