I think it would do you well to read the article, or even better, the paper associated because:
due to the size and density of the star,
It was found near two orbiting white dwarf stars, not a single star and:
Well then isn't it obvious
The key find here as that it is visual evidence, as opposed to inference from radio waves. I am unsure what the size of the stars has to do with this find. Could you explain?
"Science is interesting, and if you don't agree you can fuck off." -Dawkins