Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...187..625k&link_type=abstract
Astronomy and Astrophysics, Vol.187, NO. 1+2/NOV, P. 625, 1987
Astronomy and Astrophysics
Astrophysics
26
Scientific paper
Ground-based spectroscopic observations of emission features near 3.3 μm in comet Halley are reported. At a resolution of Δλ/λ = 0.012 the emissions consist of several components between 3.2 μm and 3.6 μm, probably superpositions of C-H group bands. The grains responsible for the 3-20 μm thermal emission do not appear to be the site of the band emitter, but either molecular or small particle emission is possible. The band shape differs from those of interstellar emitting substances in having strong features longward of 3.3 μm bands. This extra structure may be due to alkyl side-chains or to compounds characteristic of low formation temperatures. Emission at 3.52 ± .02 μm could be evidence for oxygen containing molecules, possibly formaldehyde.
Brooke Timothy Young
Joyce Richard R.
Knacke R. K.
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