One type of these objects is so named because it is chemically undifferentiated and unable to sustain fusion. Another type of these objects has a spectral class of five and a 
One type of these objects is so named because it is chemically undifferentiated and unable to sustain fusion. Another type of these objects has a spectral class of five and a low concentration of metals. Another type of these objects can form a neutron star if it accretes enough mass to exceed the Chandrasekhar limit of 1.44 solar masses. Examples of the most common type of this kind of star are AD Leonis, Wolf 359, and Barnard's Star. For 10 points, name this type of star, whose subclasses include "brown," "white," and "red."
One type of these objects is so named because it is chemically undifferentiated and unable to sustain fusion.
dwarf star [accept brown dwarfs; red dwarfs; or white dwarfs; prompt on stars]