Detection of a new molecular ion HC3NH(+) in TMC-1

Kawaguchi, Kentarou; Kasai, Yasuko; Ishikawa, Shinya; Ohishi, Masatoshi; Kaifu, Norio; Amano, T.

doi:10.1086/187171

Cited by 125 publications

(170 citation statements)

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“…This value is of the same order of magnitude as the expected column density predicted by Millar et al (2000). Kawaguchi et al (1995). e Manually fitted.…”

Section: Discussionsupporting

confidence: 61%

The quest for C$_\mathsf{2}$N in space

Fuchs

Giesen

et al. 2004

A&A

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Abstract. An extensive search for the linear C 2 N radical towards the circumstellar envelope IRC+10216 has been performed. Eight frequency bands of the rotational transitions J = 7/2-5/2 up to 13/2-11/2 and 17/2-15/2 up to 23/2-21/2 of the C 2 N molecule including their λ-doubling components have been probed, using the IRAM 30 m telescope at Pico Veleta, Spain. However, there is no evidence for the existence of the C 2 N radical towards IRC+10216. Instead, a new upper limit N T = 3.8 × 10 −12 cm −2 for the column density of C 2 N was estimated. Additionally, at least ten yet unidentified lines have been found.

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“…This value is of the same order of magnitude as the expected column density predicted by Millar et al (2000). Kawaguchi et al (1995). e Manually fitted.…”

Section: Discussionsupporting

confidence: 61%

The quest for C$_\mathsf{2}$N in space

Fuchs

Giesen

et al. 2004

A&A

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“…In the moleculerich circumstellar envelope of the evolved carbon star IRC ]10216, lines from both the K \ 0 and K \^1 rotational ladders are good candidates for detection. As Table 4 shows, however, there is no evidence for either molecule in a recent spectral line survey by Kawaguchi et al (1995). The upper limit of the column density in IRC ]10216 is HC 4 N comparable to that of but is about an order of HC 5 N, magnitude greater than that of HCCN (Kawaguchi et al 1995).…”

Section: Results and Analysismentioning

confidence: 88%

Laboratory Detection of the Ring‐Chain Carbenes HC₄N and HC₆N

McCarthy

Grabow

Travers

et al. 1999

ApJ

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The highly polar ring-chain carbenes and formed by substituting either CN or CCCN HC 4 N HC 6 N, for a hydrogen atom in cyclopropenylidene were detected in a supersonic molecular beam with (c-C 3 H 2 ), a Fourier transform microwave spectrometer. Seven a-and four b-type rotational transitions of HC 4 N and 11 a-type transitions of each with resolved nitrogen nuclear quadrupole hyperÐne structure, HC 6 N, were measured between 6 and 21 GHz, yielding precise values for the three rotational constants, the leading centrifugal distortion constants, and the quadrupole coupling constants. Like the hydrocarbon carbenes and both new molecules have a planar ring-chain structures and singlet C 5 H 2 , C 7 H 2 , C 9 H 2 , electronic ground states. The strongest lines of can be detected with a signal-to-noise ratio HC 4 N exceeding 10 in a total integration time of less than 1 s, but the lines of were nearly 100 times HC 6 N weaker.

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“…Interestingly, a molecular line survey of the circumstellar envelope of the carbon-rich star CW Leo, also known as IRC +10216, between 28 and 50 GHz revealed several series of unidentified lines (Kawaguchi et al 1995). One of these turned out to be caused by the anion C 6 H − (McCarthy et al 2006).…”

Section: Hydridesmentioning

confidence: 99%

Division Xii/Commission 14/Working Group on Molecular Data

Federman¹,

Bernath²,

Müller³

2011

Proc. IAU

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The current report covers the period from the second half of 2003 to the first half of 2011, bringing the Working Group's efforts up to date, and is divided into three main sections covering rotational, vibrational, and electronic spectroscopy. Rather than being exhaustive, space limitations only allow us to highlight a representative sample of work on molecular spectra. Related research on collisions, reactions on grain surfaces, and astrochemistry appear in the report by another Working Group. These also recount recent conferences and workshops on molecular astrophysics.

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Detection of a new molecular ion HC3NH(+) in TMC-1

Cited by 125 publications

References 0 publications

The quest for C$_\mathsf{2}$N in space

The quest for C$_\mathsf{2}$N in space

Laboratory Detection of the Ring‐Chain Carbenes HC₄N and HC₆N

Division Xii/Commission 14/Working Group on Molecular Data

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Detection of a new molecular ion HC3NH(+) in TMC-1

Cited by 125 publications

References 0 publications

The quest for C$_\mathsf{2}$N in space

The quest for C$_\mathsf{2}$N in space

Laboratory Detection of the Ring‐Chain Carbenes HC4N and HC6N

Division Xii/Commission 14/Working Group on Molecular Data

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Laboratory Detection of the Ring‐Chain Carbenes HC₄N and HC₆N