Molecular hydrogen emission from discs in the eta Chamaeleontis cluster

S. K. Ramsay Howat; J. S. Greaves

doi:10.1111/j.1365-2966.2007.12049.x

Molecular hydrogen emission from discs in the eta Chamaeleontis cluster

S. K. Ramsay Howat, J. S. Greaves

School of Physics and Astronomy

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

23 Citations (Scopus)

Abstract

Discs in the 6 Myr old cluster eta Chamaeleontis were searched for emission from hot H-2. Around the M3 star ECHA J0843.3-7905, we detect circumstellar gas orbiting at similar to 2 au. If the gas is ultraviolet excited, the ro-vibrational line traces a hot gas layer supported by a disc of mass similar to 0.03M(circle dot), similar to the minimum mass solar nebula. Such a gas reservoir at 6 Myr would promote the formation and the inwards migration of gas giant planets.

Original language	English
Pages (from-to)	1658-1664
Number of pages	7
Journal	Monthly Notices of the Royal Astronomical Society
Volume	379
DOIs	https://doi.org/10.1111/j.1365-2966.2007.12049.x
Publication status	Published - 21 Aug 2007

Keywords

circumstellar matter
planetary systems : formation
infrared : stars
MAIN-SEQUENCE STARS
ROTATIONAL H-2 EMISSION
T-TAURI STAR
PROTOPLANETARY DISK
YOUNG STARS
DEBRIS DISKS
ACCRETION
EVOLUTION
GAS
SPECTROSCOPY

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10.1111/j.1365-2966.2007.12049.x

Cite this

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title = "Molecular hydrogen emission from discs in the eta Chamaeleontis cluster",

abstract = "Discs in the 6 Myr old cluster eta Chamaeleontis were searched for emission from hot H-2. Around the M3 star ECHA J0843.3-7905, we detect circumstellar gas orbiting at similar to 2 au. If the gas is ultraviolet excited, the ro-vibrational line traces a hot gas layer supported by a disc of mass similar to 0.03M(circle dot), similar to the minimum mass solar nebula. Such a gas reservoir at 6 Myr would promote the formation and the inwards migration of gas giant planets.",

keywords = "circumstellar matter, planetary systems : formation, infrared : stars, MAIN-SEQUENCE STARS, ROTATIONAL H-2 EMISSION, T-TAURI STAR, PROTOPLANETARY DISK, YOUNG STARS, DEBRIS DISKS, ACCRETION, EVOLUTION, GAS, SPECTROSCOPY",

author = "Howat, {S. K. Ramsay} and Greaves, {J. S.}",

year = "2007",

month = aug,

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doi = "10.1111/j.1365-2966.2007.12049.x",

language = "English",

volume = "379",

pages = "1658--1664",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

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TY - JOUR

T1 - Molecular hydrogen emission from discs in the eta Chamaeleontis cluster

AU - Howat, S. K. Ramsay

AU - Greaves, J. S.

PY - 2007/8/21

Y1 - 2007/8/21

N2 - Discs in the 6 Myr old cluster eta Chamaeleontis were searched for emission from hot H-2. Around the M3 star ECHA J0843.3-7905, we detect circumstellar gas orbiting at similar to 2 au. If the gas is ultraviolet excited, the ro-vibrational line traces a hot gas layer supported by a disc of mass similar to 0.03M(circle dot), similar to the minimum mass solar nebula. Such a gas reservoir at 6 Myr would promote the formation and the inwards migration of gas giant planets.

AB - Discs in the 6 Myr old cluster eta Chamaeleontis were searched for emission from hot H-2. Around the M3 star ECHA J0843.3-7905, we detect circumstellar gas orbiting at similar to 2 au. If the gas is ultraviolet excited, the ro-vibrational line traces a hot gas layer supported by a disc of mass similar to 0.03M(circle dot), similar to the minimum mass solar nebula. Such a gas reservoir at 6 Myr would promote the formation and the inwards migration of gas giant planets.

KW - circumstellar matter

KW - planetary systems : formation

KW - infrared : stars

KW - MAIN-SEQUENCE STARS

KW - ROTATIONAL H-2 EMISSION

KW - T-TAURI STAR

KW - PROTOPLANETARY DISK

KW - YOUNG STARS

KW - DEBRIS DISKS

KW - ACCRETION

KW - EVOLUTION

KW - GAS

KW - SPECTROSCOPY

UR - http://www.scopus.com/inward/record.url?scp=34547791295&partnerID=8YFLogxK

U2 - 10.1111/j.1365-2966.2007.12049.x

DO - 10.1111/j.1365-2966.2007.12049.x

M3 - Article

SN - 0035-8711

VL - 379

SP - 1658

EP - 1664

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

ER -

Molecular hydrogen emission from discs in the eta Chamaeleontis cluster

Abstract

Keywords

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Astrophysics at St Andrews: Astrophysics at St.Andrews

Research Fellowship - PP/C001524/1: How common is the Earth?

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Molecular hydrogen emission from discs in the eta Chamaeleontis cluster

Abstract

Keywords

Access to Document

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Projects

Astrophysics at St Andrews: Astrophysics at St.Andrews

Research Fellowship - PP/C001524/1: How common is the Earth?

Cite this