SIMBAD references

2002ApJ...571L.151B - Astrophys. J., 571, L151-L154 (2002/June-1)

Evidence of cloud disruption in the L/T dwarf transition.

BURGASSER A.J., MARLEY M.S., ACKERMAN A.S., SAUMON D., LODDERS K., DAHN C.C., HARRIS H.C. and KIRKPATRICK J.D.

Abstract (from CDS):

Clouds of metal-bearing condensates play a critical role in shaping the emergent spectral energy distributions of the coolest classes of low-mass stars and brown dwarfs, L and T dwarfs. Because condensate clouds in planetary atmospheres show distinct horizontal structure, we have explored a model for partly cloudy atmospheres in brown dwarfs. Our model successfully reproduces the colors and magnitudes of both L and T dwarfs for the first time, including the unexpected brightening of the early- and mid-type T dwarfs at the J band, provided that clouds are rapidly removed from the photosphere at Teff~1200 K. The clearing of cloud layers also explains the surprising persistence and strengthening of gaseous FeH bands in early- and mid-type T dwarfs. The breakup of cloud layers is likely driven by convection in the troposphere, analogous to phenomena observed on Jupiter. Our results demonstrate that planetary-like atmospheric dynamics must be considered when examining the evolution of free-floating brown dwarfs.

Abstract Copyright:

Journal keyword(s): Infrared: Stars - Stars: Atmospheres - Stars: Fundamental Parameters - Stars: Individual: Alphanumeric: SDSS J1254-0122 - Stars: Individual: Alphanumeric: 2MASS J0559-1404 - Stars: Low-Mass, Brown Dwarfs

Simbad objects: 10

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2020.10.26-06:01:29

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