Dust grains in a disk absorb light from the central star or brown dwarf and reemit the energy at longer wavelengths, making objects with disks appear brighter in the infrared than those without.

• 气盘上的尘埃微粒会吸收中央恒星或棕矮星所发的光，并以较长的波长将能量再辐射出去，造成带有气盘的天体于红外光波段看起来，比不带气盘的天体来得明亮。