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Title:
Previously unobserved water lines detected in the post-impact spectrum of Comet Tempel 1
Authors:
Barber, R. J.; Miller, S.; Stallard, T. S.; Tennyson, J.
Publication:
eprint arXiv:astro-ph/0610673
Publication Date:
10/2006
Origin:
ARXIV
Keywords:
Astrophysics
Comment:
This paper has been submitted to the conference proceedings: Springer-Verlag ESO Astrophysical Symposia Series (Deep Impact a a World Observatory Event) ed. Kaufl U., Sterken C. Please not that the title as it will appear in this publication omits the reference to Comet Tempel 1, as this is implicit in the the title of the Proceedings
Bibliographic Code:
2006astro.ph.10673B

Abstract

The recently puplished Barber-Tennyson (BT2) synthetic H$_2$O water line list is the most complete and accurate line list in existence. It is finding application in a wide range of astrophysical environments. UKIRT spectra of comet Tempel 1, obtained after the 'Deep Impact' event, revealed several known H$_2$O solar pumped fluorescent (SPF)lines in the 2.8945 to 2.8985 $\mu$m region. In addition, using synthetic spectra produced with BT2, several emission lines were identified that had not previously been recorded in cometary spectra. Unlike the SPF lines, which are transitions from doubly-excited stretch states, these transitions, that we label 'SH', are from states with three or four quanta of vibrational excitation. The SH features were particularly strong during the period 20-40 minutes after impact.
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arXiv e-prints