The need for small-scale turbulence in atmospheres of substellar objects
| dc.creator | Helling, Christiane | |
| dc.date | 2005-06-09 | |
| dc.date.accessioned | 2026-07-07T02:17:56Z | |
| dc.date.available | 2026-07-07T02:17:56Z | |
| dc.description | Brown dwarfs and giant gas planets are substellar objects whose spectral appearance is determined by the chemical composition of the gas and the solids/liquids in the atmosphere. Atmospheres of substellar objects possess two major scale regimes: large-scale convective motions + gravitational settling and small-scale turbulence + dust formation. Turbulence initiates dust formation spot-like on small scale, while the dust feeds back into the turbulent fluid field by its strong radiative cooling. Small, imploding dust containing areas result which eventually become isothermal. Multi-dimensional simulations show that these small-scale dust structures gather into large-scale structures, suggesting the formation of clouds made of dirty dust grains. The chemical composition of the grains, and thereby the chemical evolution of the gas phase, is a function of temperature and depends on the grain's history. | |
| dc.description | 7 pages, 2 figues, contribution to the Workshop on Interdisciplinary Aspects of Turbulence, April 18 - 22, 2005, Castle Ringberg, Germany | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0506204 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0506204 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/9300 | |
| dc.subject | Astrophysics | |
| dc.title | The need for small-scale turbulence in atmospheres of substellar objects | |
| dc.type | text |