Disequilibrium chemistry in a brown dwarf's atmosphere: Carbon monoxide in Gliese 229B

Caitlin A. Griffith; Roger V. Yelle

doi:10.1086/312103

Disequilibrium chemistry in a brown dwarf's atmosphere: Carbon monoxide in Gliese 229B

Caitlin A. Griffith, Roger V. Yelle

Research output: Contribution to journal › Article › peer-review

62 Scopus citations

Abstract

The distribution of CO in Gliese 229B's atmosphere reveals how disequilibrium processes establish the atmospheric composition. The CO abundance derived from its spectral signature exceeds the equilibrium value by several orders of magnitude. Our investigation of the source for CO considers disequilibrium mechanisms common to planetary atmospheres and concludes that the CO abundance is sensitive to atmospheric dynamics. Convection is not required to explain the observed abundance; instead, the vertical transport rate at ∼6 bars may be similar to that in planetary stratospheres.

Original language	English (US)
Pages (from-to)	L85-L88
Journal	Astrophysical Journal
Volume	519
Issue number	1 PART 2
DOIs	https://doi.org/10.1086/312103
State	Published - Jul 1 1999
Externally published	Yes

Keywords

Convection
Planets and satellites: general
Stars: atmospheres
Stars: individual (Gliese 229B)
Stars: low-mass, brown dwarfs

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/312103

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title = "Disequilibrium chemistry in a brown dwarf's atmosphere: Carbon monoxide in Gliese 229B",

abstract = "The distribution of CO in Gliese 229B's atmosphere reveals how disequilibrium processes establish the atmospheric composition. The CO abundance derived from its spectral signature exceeds the equilibrium value by several orders of magnitude. Our investigation of the source for CO considers disequilibrium mechanisms common to planetary atmospheres and concludes that the CO abundance is sensitive to atmospheric dynamics. Convection is not required to explain the observed abundance; instead, the vertical transport rate at ∼6 bars may be similar to that in planetary stratospheres.",

keywords = "Convection, Planets and satellites: general, Stars: atmospheres, Stars: individual (Gliese 229B), Stars: low-mass, brown dwarfs",

author = "Griffith, {Caitlin A.} and Yelle, {Roger V.}",

year = "1999",

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doi = "10.1086/312103",

language = "English (US)",

volume = "519",

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T1 - Disequilibrium chemistry in a brown dwarf's atmosphere

T2 - Carbon monoxide in Gliese 229B

AU - Griffith, Caitlin A.

AU - Yelle, Roger V.

PY - 1999/7/1

Y1 - 1999/7/1

N2 - The distribution of CO in Gliese 229B's atmosphere reveals how disequilibrium processes establish the atmospheric composition. The CO abundance derived from its spectral signature exceeds the equilibrium value by several orders of magnitude. Our investigation of the source for CO considers disequilibrium mechanisms common to planetary atmospheres and concludes that the CO abundance is sensitive to atmospheric dynamics. Convection is not required to explain the observed abundance; instead, the vertical transport rate at ∼6 bars may be similar to that in planetary stratospheres.

AB - The distribution of CO in Gliese 229B's atmosphere reveals how disequilibrium processes establish the atmospheric composition. The CO abundance derived from its spectral signature exceeds the equilibrium value by several orders of magnitude. Our investigation of the source for CO considers disequilibrium mechanisms common to planetary atmospheres and concludes that the CO abundance is sensitive to atmospheric dynamics. Convection is not required to explain the observed abundance; instead, the vertical transport rate at ∼6 bars may be similar to that in planetary stratospheres.

KW - Convection

KW - Planets and satellites: general

KW - Stars: atmospheres

KW - Stars: individual (Gliese 229B)

KW - Stars: low-mass, brown dwarfs

UR - http://www.scopus.com/inward/record.url?scp=0033163691&partnerID=8YFLogxK

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U2 - 10.1086/312103

DO - 10.1086/312103

M3 - Article

AN - SCOPUS:0033163691

SN - 0004-637X

VL - 519

SP - L85-L88

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 PART 2

ER -

Disequilibrium chemistry in a brown dwarf's atmosphere: Carbon monoxide in Gliese 229B

Abstract

Keywords

ASJC Scopus subject areas

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