Mosaicked images and spectra of J = 1 → 0 HCN and HCO+ emission from comet Hale-Bopp (1995 O1)

M. C.H. Wright, I. De Pater, J. R. Forster, Patrick Palmer, Lewis E. Snyder, J. M. Veal, Michael F. A'Hearn, L. M. Woodney, William M. Jackson, Y. J. Kuan, A. J. Lovell

研究成果: 雜誌貢獻文章

30 引文 斯高帕斯(Scopus)

摘要

We used the BIMA array to map comet Hale-Bopp (1995 O1) in HCN and HCO+ emission at 89 GHz with 10″ angular resolution. The mosaicked images with seven pointing centers were combined with single-dish data to form completely sampled images of a region ∼ 4′ in diameter. The HCN image is roughly compatible with a Haser model in which most of the HCN comes from the nucleus. However, clear deviations from circular symmetry are present, and roughly 20% of the HCN does not appear to come from the nuclear source. Frequently, the HCN has an asymmetric, double-peaked profile. The double peak is expected from the Haser model, and the asymmetry observed on April 3 could come from an increased gas production toward the Sun and facing the observer. The abundance of HCN relative to H2O is ∼ 0.3%. The HCO+, in contrast, is smooth, almost completely resolved in the interferometer observations, and offset toward the ion tail by about 1′. This behavior is compatible with expectations from a simple scaling of previous work.

原文英語
頁(從 - 到)3018-3028
頁數11
期刊Astronomical Journal
116
發行號6
DOIs
出版狀態已發佈 - 1998 十二月

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

指紋 深入研究「Mosaicked images and spectra of J = 1 → 0 HCN and HCO<sup>+</sup> emission from comet Hale-Bopp (1995 O1)」主題。共同形成了獨特的指紋。

  • 引用此

    Wright, M. C. H., De Pater, I., Forster, J. R., Palmer, P., Snyder, L. E., Veal, J. M., A'Hearn, M. F., Woodney, L. M., Jackson, W. M., Kuan, Y. J., & Lovell, A. J. (1998). Mosaicked images and spectra of J = 1 → 0 HCN and HCO+ emission from comet Hale-Bopp (1995 O1). Astronomical Journal, 116(6), 3018-3028. https://doi.org/10.1086/300650