Laboratory detection of the carbon chains HC15N and HC17N

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

Authors

  • M. C. Mccarthy
  • J. U. Grabow
  • M. J. Travers
  • W. Chen
  • C. A. Gottlieb
  • P. Thaddeus

External Research Organisations

  • Harvard University
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Details

Original languageEnglish
Pages (from-to)L231-L234
JournalAstrophysical Journal
Volume494
Issue number2 PART II
Publication statusPublished - 29 Jan 1998
Externally publishedYes

Abstract

The linear cyanopolyynes HC15N and HC17N were detected in the laboratory by Fourier transform microwave spectroscopy. Enough rotational lines of each species were measured in the 5-11 GHz frequency range so that precise values for the rotational and centrifugal distortion constants can be determined and the entire rotational spectra of both molecules predicted to better than 1 km s-1 in equivalent radial velocity over the range of interest to radio astronomy. Although there is a nearly constant decrement in line intensity from HC3N to HC9N of about seven, the decrement decreases by at least a factor of 2 on reaching HC17N, and as a result the lines of HC17N are nearly an order of magnitude stronger than predicted by extrapolation from the shorter cyanopolyynes. With a molecular weight of 219 amu and a rotational constant of slightly more than 50 MHz, HC17N is the longest carbon chain identified to date by high-resolution spectroscopy.

Keywords

    ISM: molecules, Line: identification, Molecular data, Molecular processes, Radio lines: ISM

ASJC Scopus subject areas

Cite this

Laboratory detection of the carbon chains HC15N and HC17N. / Mccarthy, M. C.; Grabow, J. U.; Travers, M. J. et al.
In: Astrophysical Journal, Vol. 494, No. 2 PART II, 29.01.1998, p. L231-L234.

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

Mccarthy, MC, Grabow, JU, Travers, MJ, Chen, W, Gottlieb, CA & Thaddeus, P 1998, 'Laboratory detection of the carbon chains HC15N and HC17N', Astrophysical Journal, vol. 494, no. 2 PART II, pp. L231-L234. https://doi.org/10.1086/311188
Mccarthy, M. C., Grabow, J. U., Travers, M. J., Chen, W., Gottlieb, C. A., & Thaddeus, P. (1998). Laboratory detection of the carbon chains HC15N and HC17N. Astrophysical Journal, 494(2 PART II), L231-L234. https://doi.org/10.1086/311188
Mccarthy MC, Grabow JU, Travers MJ, Chen W, Gottlieb CA, Thaddeus P. Laboratory detection of the carbon chains HC15N and HC17N. Astrophysical Journal. 1998 Jan 29;494(2 PART II):L231-L234. doi: 10.1086/311188
Mccarthy, M. C. ; Grabow, J. U. ; Travers, M. J. et al. / Laboratory detection of the carbon chains HC15N and HC17N. In: Astrophysical Journal. 1998 ; Vol. 494, No. 2 PART II. pp. L231-L234.
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AU - Mccarthy, M. C.

AU - Grabow, J. U.

AU - Travers, M. J.

AU - Chen, W.

AU - Gottlieb, C. A.

AU - Thaddeus, P.

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