[Tee tiong huat]

All three options remain on the table. The best way to figure it out will be to examine the chemical composition of the star in greater detail. If J1249+36 was the companion of a white dwarf, the supernova could have left trace elements that polluted the L subdwarf's atmosphere. Conversely, globular clusters contain stars that all have similar compositional properties, so it may be possible to link the star to a home population that way.

And if neither of those pan out, we may need to look to the Milky Way's satellites, to determine whether this tiny, dim star is a stranger from outside the galaxy, just winking howdy as it passes through.

The discovery was presented at the 224th Meeting of the American Astronomical Society.

Binary Star System Supernova Explosion and it Fly 600 k/m in just one (1) second.

https://youtu.be/lUijqBYb83w?si=B1nYTf03YuxrpUsq