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Cosmic Collision: Black Hole and Pulsar Born!
10 Sep
Summary
- A collapsing star likely created a pulsar and a black hole.
- An 'HB supernova' event involved electron and positron collisions.
- Multiple stellar explosions occurred within seconds of each other.
In early 2022, a massive gamma-ray burst from a distant galaxy, GRB 220101A, was detected by the Neil Gehrels Swift Observatory. Astronomers analyzing the event have proposed a complex origin story, suggesting the birth of both a pulsar and a black hole from a single collapsing star.
The proposed sequence began with the core collapse of a massive star, triggering an "HB supernova" characterized by electron and positron particle collisions. This event then caused a nearby white dwarf to collapse into a neutron star, initiating a second supernova blast just 3.5 seconds later.
This secondary explosion collided with another neutron star, leading to an intense energy burst before that neutron star collapsed into a black hole. Material falling onto the newly formed neutron star caused it to spin rapidly, transforming it into a pulsar.
However, not all experts agree with this intricate explanation. Some argue that while the proposed model is intriguing, the observational data, though excellent, does not definitively support such a complex outcome and could also be explained by a simpler event resulting in a single black hole.
