Equilibrium chemistry in a brown dwarf's atmosphere: Cesium in Gliese 229B

Caitlin A. Griffith; Roger V. Yelle

doi:10.1086/312550

Equilibrium chemistry in a brown dwarf's atmosphere: Cesium in Gliese 229B

Caitlin A. Griffith, Roger V. Yelle

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

7 Scopus citations

Abstract

The distribution of Cs in Gliese 229B's atmosphere reveals how equilibrium chemistry establishes the atmospheric composition. The rapid kinetics of cesium chemistry keeps the Cs abundance in thermochemical equilibrium and renders Cs a sensitive measure of chemical processes in brown dwarf atmospheres. Observations of Gliese 229B indicate a subsolar bulk abundance of Cs, the depletion of alkali metals in the upper atmosphere from condensation, and a partitioning of heavy elements different from that of the Sun.

Original language	English (US)
Pages (from-to)	L59-L62
Journal	Astrophysical Journal
Volume	532
Issue number	1 PART 2
DOIs	https://doi.org/10.1086/312550
State	Published - Mar 20 2000
Externally published	Yes

Keywords

Infrared: stars
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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10.1086/312550

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title = "Equilibrium chemistry in a brown dwarf's atmosphere: Cesium in Gliese 229B",

abstract = "The distribution of Cs in Gliese 229B's atmosphere reveals how equilibrium chemistry establishes the atmospheric composition. The rapid kinetics of cesium chemistry keeps the Cs abundance in thermochemical equilibrium and renders Cs a sensitive measure of chemical processes in brown dwarf atmospheres. Observations of Gliese 229B indicate a subsolar bulk abundance of Cs, the depletion of alkali metals in the upper atmosphere from condensation, and a partitioning of heavy elements different from that of the Sun.",

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

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

year = "2000",

month = mar,

day = "20",

doi = "10.1086/312550",

language = "English (US)",

volume = "532",

pages = "L59--L62",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

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TY - JOUR

T1 - Equilibrium chemistry in a brown dwarf's atmosphere

T2 - Cesium in Gliese 229B

AU - Griffith, Caitlin A.

AU - Yelle, Roger V.

PY - 2000/3/20

Y1 - 2000/3/20

N2 - The distribution of Cs in Gliese 229B's atmosphere reveals how equilibrium chemistry establishes the atmospheric composition. The rapid kinetics of cesium chemistry keeps the Cs abundance in thermochemical equilibrium and renders Cs a sensitive measure of chemical processes in brown dwarf atmospheres. Observations of Gliese 229B indicate a subsolar bulk abundance of Cs, the depletion of alkali metals in the upper atmosphere from condensation, and a partitioning of heavy elements different from that of the Sun.

AB - The distribution of Cs in Gliese 229B's atmosphere reveals how equilibrium chemistry establishes the atmospheric composition. The rapid kinetics of cesium chemistry keeps the Cs abundance in thermochemical equilibrium and renders Cs a sensitive measure of chemical processes in brown dwarf atmospheres. Observations of Gliese 229B indicate a subsolar bulk abundance of Cs, the depletion of alkali metals in the upper atmosphere from condensation, and a partitioning of heavy elements different from that of the Sun.

KW - Infrared: stars

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=0034688746&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0034688746&partnerID=8YFLogxK

U2 - 10.1086/312550

DO - 10.1086/312550

M3 - Article

AN - SCOPUS:0034688746

SN - 0004-637X

VL - 532

SP - L59-L62

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 PART 2

ER -

Equilibrium chemistry in a brown dwarf's atmosphere: Cesium in Gliese 229B

Abstract

Keywords

ASJC Scopus subject areas

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