Neutral Atomic Emissions from Comet Hale-Bopp

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

High resolution (R=100,000) spectra of atomic oxygen, hydrogen, and carbon from Comet Hale-Bopp were obtained at the NSO McMath-Pierce main telescope from February 8 to April 19, 1997, using a 50 mm dual-etalon Fabry-Perot/CCD spectrometer. The field of view was 6 arcmin. Spectra with good signal-to-noise were obtained for the emission lines [O I] 6300 Angstroms, Hα (6563 Angstroms), and [C I] 9850 Angstroms. On several of these nights, complementary [O I] 6300 Angstroms observations were simultaneously obtained with the Wisconsin Hα Mapper (WHα M) at Kitt Peak. Additional [O I] 6300 Angstroms observations were also obtained in September 1996. These [C I] 9850 Angstroms observations are the first extensive data set of this cometary line. We will present an overview of our observations and preliminary results.

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