Torsionally excited methyl formate in Orion KL

Kaori Kobayashi; Kazumi Ogata; Shozo Tsunekawa; Shuro Takano

doi:10.1086/512977

Torsionally excited methyl formate in Orion KL

Kaori Kobayashi^*, Kazumi Ogata, Shozo Tsunekawa, Shuro Takano

^*Corresponding author for this work

Department of Physics

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

45 Scopus citations

Abstract

We report the first detection of rotational transitions of methyl formate (HCOOCH₃) in the first torsionally excited state (v_t = 1). Recent progress on the assignment of laboratory spectra of methyl formate made it possible for us to assign about 20 unidentified lines in Orion KL from previous line surveys below 200 GHz to the first torsionally excited methyl formate. The rotational temperature and column density obtained in the first torsionally excited state were 44 ± 10 K and (8.6 ± 3.2) × 10¹⁴ cm^-2, respectively. They were compared with those in the ground state.

Original language	English
Pages (from-to)	L17-L19
Journal	Astrophysical Journal
Volume	657
Issue number	1 II
DOIs	https://doi.org/10.1086/512977
State	Published - 2007/03/01

Keywords

ISM: individual (orion kleinmann-low)
ISM: molecules
Line: identification
Radio lines: ISM

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/512977

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title = "Torsionally excited methyl formate in Orion KL",

abstract = "We report the first detection of rotational transitions of methyl formate (HCOOCH3) in the first torsionally excited state (vt = 1). Recent progress on the assignment of laboratory spectra of methyl formate made it possible for us to assign about 20 unidentified lines in Orion KL from previous line surveys below 200 GHz to the first torsionally excited methyl formate. The rotational temperature and column density obtained in the first torsionally excited state were 44 ± 10 K and (8.6 ± 3.2) × 1014 cm-2, respectively. They were compared with those in the ground state.",

keywords = "ISM: individual (orion kleinmann-low), ISM: molecules, Line: identification, Radio lines: ISM",

author = "Kaori Kobayashi and Kazumi Ogata and Shozo Tsunekawa and Shuro Takano",

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doi = "10.1086/512977",

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T1 - Torsionally excited methyl formate in Orion KL

AU - Kobayashi, Kaori

AU - Ogata, Kazumi

AU - Tsunekawa, Shozo

AU - Takano, Shuro

PY - 2007/3/1

Y1 - 2007/3/1

N2 - We report the first detection of rotational transitions of methyl formate (HCOOCH3) in the first torsionally excited state (vt = 1). Recent progress on the assignment of laboratory spectra of methyl formate made it possible for us to assign about 20 unidentified lines in Orion KL from previous line surveys below 200 GHz to the first torsionally excited methyl formate. The rotational temperature and column density obtained in the first torsionally excited state were 44 ± 10 K and (8.6 ± 3.2) × 1014 cm-2, respectively. They were compared with those in the ground state.

AB - We report the first detection of rotational transitions of methyl formate (HCOOCH3) in the first torsionally excited state (vt = 1). Recent progress on the assignment of laboratory spectra of methyl formate made it possible for us to assign about 20 unidentified lines in Orion KL from previous line surveys below 200 GHz to the first torsionally excited methyl formate. The rotational temperature and column density obtained in the first torsionally excited state were 44 ± 10 K and (8.6 ± 3.2) × 1014 cm-2, respectively. They were compared with those in the ground state.

KW - ISM: individual (orion kleinmann-low)

KW - ISM: molecules

KW - Line: identification

KW - Radio lines: ISM

UR - http://www.scopus.com/inward/record.url?scp=33947540928&partnerID=8YFLogxK

U2 - 10.1086/512977

DO - 10.1086/512977

M3 - 学術論文

AN - SCOPUS:33947540928

SN - 0004-637X

VL - 657

SP - L17-L19

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 II

ER -

Torsionally excited methyl formate in Orion KL

Abstract

Keywords

ASJC Scopus subject areas

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