Simultaneous visible and near-infrared spectrophotometry of comet Austin 1989c1

Stephen C. Tegler, Humberto Campins, Stephen Larson, Marvin Kleine, Douglas Kelly, Marcia Rieke

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


Simultaneous visible and near-infrared spectra of comet Austin were obtained with the 1.5 m and 2.3 m telescopes of the University of Arizona Observatories on 1990 May 16. The visible spectrum obtained with the IHW spectrograph covers the 3126-9490 Å wavelength interval, while the near-infrared spectrum obtained with the germanium spectrometer covers the 9036-12794 Ä wavelength interval. For the first time, we present simultaneous measurements of integrated band fluxes for the CN B 2Σ+ - X 2Σ+ (violet) and A 2Π+ - X 2Σ+ (red) systems. We also present a CN spectrum and CN band flux ratios calculated from a fluoresence equilibrium model. From a comparison between the observed and calculated CN spectra and band flux ratios, we find that red system oscillator strengths determined from recent ab initio calculations appropriately describe the radiative properties of CN molecules.

Original languageEnglish (US)
Pages (from-to)711-716
Number of pages6
JournalAstrophysical Journal
Issue number2
StatePublished - 1992


  • Molecular processes

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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