“The First Ever” –Cosmic Sleuths Witness Birth of a Black Hole or Neutron Star

The Cow Black Hole or Neutron Star


“We know from theory that black holes and neutron stars form when a star dies, but we’ve never seen them right after they are born. Never!” said Raffaella Margutti, assistant professor of physics and astronomy at Northwestern University about the mysterious bright object that has baffled astronomers dubbed ‘The Cow’. “A ‘lightbulb’ was sitting deep inside the ejecta of the explosion. It would have been hard to see this in a normal stellar explosion. But The Cow had very little ejecta mass, which allowed us to view the central engine’s radiation directly.”


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