[121] This would put A's disc entirely within the frost line, and a small part of B's outer disc just outside. (en.wikipedia.org)
Like a wheel in a wheel, GG Tau - A contains a large, outer disc encircling the entire system as well as an inner disc around the main central star. (alma-telescope.jp)
ALMA observations of the disc and gas streams around HD 142527 The dust in the outer disc is shown in red. (alma-telescope.jp)