“Mergers of black holes with neutron stars are exceptionally rare in the Universe. “An actual merger of a neutron star with a black hole happens, perhaps, once every million years in a galaxy. To see one in the Milky Way, we would have to watch for a very long time,” Harald Pfeiffer,group leader in the Astrophysical and Cosmological Relativity department at Max Planck Institute for Gravitational Physics (AEI) in Potsdam, Germany, told The Daily Galaxy about recent neutron star-black hole merger of GW200105, detected by LIGO and Virgo in the past five years that have opened a completely new new way of observing the Universe.
Avi Shporer, Research Scientist, MIT Kavli Institute for Astrophysics and Space Research. A Google Scholar, Avi was formerly a NASA Sagan Fellow at the Jet Propulsion Laboratory (JPL). His motto, not surprisingly, is a quote from Carl Sagan: “Somewhere, something incredible is waiting to be known.”
The visible mass in the Universe emerged at the Big Bang when hadrons — the building blocks of atomic nuclei — formed from a hot fireball made of quarks and gluons reports Nature. When temperatures raise to trillions of degrees, particles deep inside the atoms start to shift into new, non-atomic states. Protons and neutrons inside the fireball of a neutron-star merger reach a density analogous to the effect of cramming New York City into a sugar cube.
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