One of these objects with usually large proper motion is named for Teegarden.
One of these objects with usually large proper motion is named for Teegarden. These objects' "desert" is a location beyond a distance where these objects have lower frequency, and is hypothesized to exist due to migration. Two different classes of them can be distinguished by the presence or absence of titanium oxide bands and metal hydride bands. The VLT mapped the atmosphere of Luhman 16B, one of these objects. The WISE and (*) 2-MASS surveys have detected several of these objects, which can be grouped into M, L, T, and Y types. These objects are confirmed by finding lithium in their atmospheres. These astronomical objects exist in the lower right of the HR diagram, and they do not have enough mass to fuse hydrogen. Including Gliese 229B, for 10 points, identify these "failed" stars whose upper mass limit is around 80 times that of Jupiter.
One of these objects with usually large proper motion is named for Teegarden.
brown dwarf [prompt on "star", prompt on "dwarf"]