Title makes no sense. Let's see if the questions do. I got bogged down in this article from Science Daily. https://www.scienced...90124141600.htm
So, I backed up to some definitions. Wiki says "A neutron star is the collapsed core of a giant star which before collapse had a total of between 10 and 29 solar masses.
Google says "Neutron stars are thought to form by the gravitational collapse of the remnant of a massive star after a supernova explosion, provided that the star is insufficiently massive to produce a black hole.
Question 1: Provided which star is insufficiently massive?
Wiki also says that a binary system is a neutron star paired with a massive "normal" supergiant star.
Question 2: In the Science Daily article, we have a binary system. Is the "normal supergiant" collapsed or did that neutron core come from another star that did collapse?
Thanks for answers. They will help read the article with comprehension. I am thinking we have a different picture when we speak of binary systems.