Bima array photodissociation measurements of HCN and CS in comet Hale-Bopp (C/1995 O1)

Lewis E. Snyder, J. M. Veal, L. M. Woodney, M. C.H. Wright, Patrick Palmer, Michael F. A'Hearn, Yi-Jehng Kuan, I. De Pater, J. R. Forster

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Abstract

We present single-field images, cross-correlation spectra, and autocorrelation spectra of HCN and CS from comet Hale-Bopp (C/1995 O1) observed with the BIMA array. Haser modeling of our HCN images yields scale length values that are in excellent agreement with both the theoretical prediction and our previous mosaicked-image value. On the other hand, the same method applied to CS yields a scale length that is ∼ 10 times smaller than the commonly accepted value. Consequently, the CS fraction in comets would be increased with respect to some earlier determinations.

Original languageEnglish
Pages (from-to)1147-1154
Number of pages8
JournalAstronomical Journal
Volume121
Issue number2
DOIs
Publication statusPublished - 2001 Feb 1

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Keywords

  • Comets: individual (Hale-Bopp (C/1995 O1))
  • Molecular processes
  • Radio emission lines
  • Techniques: interferometric

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Snyder, L. E., Veal, J. M., Woodney, L. M., Wright, M. C. H., Palmer, P., A'Hearn, M. F., Kuan, Y-J., De Pater, I., & Forster, J. R. (2001). Bima array photodissociation measurements of HCN and CS in comet Hale-Bopp (C/1995 O1). Astronomical Journal, 121(2), 1147-1154. https://doi.org/10.1086/318756