In reference to the following article and paper at https://phys.org/news/2019-05-rare-earth-metals-atmosphere-glowing-hot-exoplanet.html and the paper at https://arxiv.org/abs/1905.02096v1
With regard to the extract in the article thus, "Therefore, its atmosphere reaches temperatures of around 4000 °C. In such heat, all elements are almost completely vaporized and molecules are broken apart into their constituent atoms" I find it rather difficult to imagine how any planet could form that close to its parent star and at such temperatures. Is this evidence for "planetary migration"? I also vaguely remember a proposition a few years ago, supporting the "planetary migration" hypothesis with our own gaseous giants, Jupiter and Saturn...something along the lines of probably forming much further out then their current orbital parameters, migrating inwards, then back again to their now apparent stable orbits.
Any thoughts?