Observations of H2S toward OMC-1.

Y. C. Minh, L. M. Ziurys, W. M. Irvine, D. McGonagle

Research output: Contribution to journalArticle

Abstract

Interstellar hydrogen sulfide (H2S) and its isotopic variant (H2(34)S) have been observed toward several positions in OMC-1 via their 1(10)-1(01) transitions near 168 GHz using the FCRAO 14 m telescope. We derive total column densities toward Orion(KL) for the extended ridge, for the plateau, and for the hot core, in addition to values for other positions in OMC-1. The fractional abundance of H2S (approximately 10(-9)) in the quiescent regions of OMC-1 seems to be difficult to explain by currently known ion-molecule reactions. The fractional abundance of H2S relative to H2 is enhanced by a factor of 1000 in the hot core and the plateau relative to the quiescent clouds. This enhancement may be a result of grain surface chemistry and/or of high-temperature gas-phase chemistry. From the nondetection of HDS in its 2(11)-2(12) transition, we estimate the abundance ratio [HDS]/H2S] < or = 0.02 in the hot core.

Original languageEnglish (US)
Pages (from-to)136-141
Number of pages6
JournalAstrophysical Journal
Volume360
Issue number1
StatePublished - Sep 1 1990
Externally publishedYes

Fingerprint

plateaus
plateau
chemistry
hydrogen sulfide
high temperature gases
ridges
telescopes
vapor phases
ion
augmentation
estimates
gas
molecules
ions

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Minh, Y. C., Ziurys, L. M., Irvine, W. M., & McGonagle, D. (1990). Observations of H2S toward OMC-1. Astrophysical Journal, 360(1), 136-141.

Observations of H2S toward OMC-1. / Minh, Y. C.; Ziurys, L. M.; Irvine, W. M.; McGonagle, D.

In: Astrophysical Journal, Vol. 360, No. 1, 01.09.1990, p. 136-141.

Research output: Contribution to journalArticle

Minh, YC, Ziurys, LM, Irvine, WM & McGonagle, D 1990, 'Observations of H2S toward OMC-1.', Astrophysical Journal, vol. 360, no. 1, pp. 136-141.
Minh YC, Ziurys LM, Irvine WM, McGonagle D. Observations of H2S toward OMC-1. Astrophysical Journal. 1990 Sep 1;360(1):136-141.
Minh, Y. C. ; Ziurys, L. M. ; Irvine, W. M. ; McGonagle, D. / Observations of H2S toward OMC-1. In: Astrophysical Journal. 1990 ; Vol. 360, No. 1. pp. 136-141.
@article{8aaf699e38f745e7bb79b202a24a8ad5,
title = "Observations of H2S toward OMC-1.",
abstract = "Interstellar hydrogen sulfide (H2S) and its isotopic variant (H2(34)S) have been observed toward several positions in OMC-1 via their 1(10)-1(01) transitions near 168 GHz using the FCRAO 14 m telescope. We derive total column densities toward Orion(KL) for the extended ridge, for the plateau, and for the hot core, in addition to values for other positions in OMC-1. The fractional abundance of H2S (approximately 10(-9)) in the quiescent regions of OMC-1 seems to be difficult to explain by currently known ion-molecule reactions. The fractional abundance of H2S relative to H2 is enhanced by a factor of 1000 in the hot core and the plateau relative to the quiescent clouds. This enhancement may be a result of grain surface chemistry and/or of high-temperature gas-phase chemistry. From the nondetection of HDS in its 2(11)-2(12) transition, we estimate the abundance ratio [HDS]/H2S] < or = 0.02 in the hot core.",
author = "Minh, {Y. C.} and Ziurys, {L. M.} and Irvine, {W. M.} and D. McGonagle",
year = "1990",
month = "9",
day = "1",
language = "English (US)",
volume = "360",
pages = "136--141",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing Ltd.",
number = "1",

}

TY - JOUR

T1 - Observations of H2S toward OMC-1.

AU - Minh, Y. C.

AU - Ziurys, L. M.

AU - Irvine, W. M.

AU - McGonagle, D.

PY - 1990/9/1

Y1 - 1990/9/1

N2 - Interstellar hydrogen sulfide (H2S) and its isotopic variant (H2(34)S) have been observed toward several positions in OMC-1 via their 1(10)-1(01) transitions near 168 GHz using the FCRAO 14 m telescope. We derive total column densities toward Orion(KL) for the extended ridge, for the plateau, and for the hot core, in addition to values for other positions in OMC-1. The fractional abundance of H2S (approximately 10(-9)) in the quiescent regions of OMC-1 seems to be difficult to explain by currently known ion-molecule reactions. The fractional abundance of H2S relative to H2 is enhanced by a factor of 1000 in the hot core and the plateau relative to the quiescent clouds. This enhancement may be a result of grain surface chemistry and/or of high-temperature gas-phase chemistry. From the nondetection of HDS in its 2(11)-2(12) transition, we estimate the abundance ratio [HDS]/H2S] < or = 0.02 in the hot core.

AB - Interstellar hydrogen sulfide (H2S) and its isotopic variant (H2(34)S) have been observed toward several positions in OMC-1 via their 1(10)-1(01) transitions near 168 GHz using the FCRAO 14 m telescope. We derive total column densities toward Orion(KL) for the extended ridge, for the plateau, and for the hot core, in addition to values for other positions in OMC-1. The fractional abundance of H2S (approximately 10(-9)) in the quiescent regions of OMC-1 seems to be difficult to explain by currently known ion-molecule reactions. The fractional abundance of H2S relative to H2 is enhanced by a factor of 1000 in the hot core and the plateau relative to the quiescent clouds. This enhancement may be a result of grain surface chemistry and/or of high-temperature gas-phase chemistry. From the nondetection of HDS in its 2(11)-2(12) transition, we estimate the abundance ratio [HDS]/H2S] < or = 0.02 in the hot core.

UR - http://www.scopus.com/inward/record.url?scp=0025495314&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0025495314&partnerID=8YFLogxK

M3 - Article

C2 - 11538684

VL - 360

SP - 136

EP - 141

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 1

ER -