absorption. The so-called "lithium test" is less reliable to determine a low mass for young L-dwarfs. An example for a low gravity object is CWISE J0506+0738, which has a spectral type between L8? and T0? and probably a mass of 7±2 .

Variability and clouds

Iron clouds with silicate clouds on top of it were theorized since the early 2000s for L-dwarfs. The presence of silicates in L-dwarfs is well established with Spitzer

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