Laboratory measurement of the pure rotational spectrum of vibrationally excited HCO(+) (nu2 = 1) by far-infrared laser sideband spectroscopy

Details Laboratory measurement of the pure rotational spectrum of vibrationally excited HCO(+) (nu2 = 1) by far-infrared laser sideband spectroscopy Laboratory measurement of the pure rotational spectrum of vibrationally excited HCO(+) (nu2 = 1) by far-infrared laser sideband spectroscopy

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...316l..45b&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 316, May 1, 1987, p. L45-L48. Research supported by

Astronomy and Astrophysics

Astrophysics

21

Formyl Ions, Ground State, Infrared Lasers, Interstellar Matter, Laser Spectroscopy, Rotational Spectra, Far Infrared Radiation, Frequency Modulation, Semiconductor Diodes, Semiconductor Lasers

Scientific paper

Laboratory observations of the pure rotational spectrum of HCO(+) in its lowest excited bending state are reported. Because of their severe excitation requirements, such vibrational satellites and the high-J ground-state lines, also measured here, sample only hot, dense regions of matter in active molecular cloud cores and circumstellar envelopes. As the HCO(+) abundance is tied directly to the gas fractional ionization, it is probable that the vibrationally excited formyl ion transitions will provide high-contrast observations of shocked molecular material, rather than the more quiescent, radiatively heated gas surrounding stellar sources detected with the few vibrationally excited neutral species observed to date.

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