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Hans Publishers, Astronomy & Astrophysics, (573), p. A1

DOI: 10.1051/0004-6361/201424403

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Forbidden oxygen lines at various nucleocentric distances in comets

Journal article published in 2014 by Alice Decock, Emmanuel Jehin, P. Rousselot, Damien Hutsemekers, Jean Manfroid, S. Raghuram, A. Bhardwaj ORCID, Benoît Hubert
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Red circle
Preprint: archiving forbidden
Red circle
Postprint: archiving forbidden
Red circle
Published version: archiving forbidden
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Abstract

Aims: We study the formation of the [OI] lines - that is, 5577.339 Å (the green line), 6300.304 Å and 6363.776 Å (the two red lines) - in the coma of comets and determine the parent species of the oxygen atoms using the ratio of the green-to-red-doublet emission intensity, I[SUB]5577[/SUB]/(I[SUB]6300[/SUB] + I[SUB]6364[/SUB]), (hereafter the G/R ratio) and the line velocity widths. Methods: We acquired high-resolution spectroscopic observations at the ESO Very Large Telescope of comets C/2002 T7 (LINEAR), 73P-C/Schwassmann-Wachmann 3, 8P/Tuttle, and 103P/Hartley 2 when they were close to Earth (