A "dust disk" is a term used to describe a flat shape made up of tiny particles of dust or debris. It can often be found around a celestial object, like a star or a planet. Full definition
While HCN molecules were found in 30 percent of dust disks circling 44 yellow stars like Sol, none was detected around 17 cooler and reddish, type - M dwarf stars and brown dwarfs believed to be common in the observable the universe as well as in our Milky Way galaxy. (members.nova.org)
An image of the circumstellar dust disk around the young star HR4796A, which is thought to have been created by collisions between asteroids and planetesimals that were left over following the star's formation. (americaspace.com)
More specifically, the researchers used Spitzer's Infrared Array Camera earlier this year in order to observe KIC 8462852 in mid-infrared wavelengths between 3.6 µm and 8 µm, while searching for an excess infrared radiation signature which would indicate the presence of a circumstellar dust disk of material, possibly caused by collisions between asteroids or large planets within the system. (americaspace.com)