Masses of fragments that could be produced in-situ via disk gravitational instabilities for HR 2562 as a function of the semi-major axis to the star (blue area). Fragments with masses above the curve labeled “Cooling criterion” cannot cool efficiently enough, while those below the curve labeled “Toomre criterion” do not satisfy the Toomre criterion. The location of HR 2562 B is indicated with the red square with error bars. The primordial disk masses required to support fragments of a given mass are shown with black dashed curves for several masses expressed as fractions of the stellar mass. The purple vertical solid line indicates the inner radius of the debris disk from Konopacky et al. (2016b).