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J/A+A/648/A49 Comet 46P/Wirtanen millimetre-wave spectra (Biver+, 2021)
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Beginning of ReadMe :J/A+A/648/A49 Comet 46P/Wirtanen millimetre-wave spectra (Biver+, 2021)
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Molecular composition of comet 46P/Wirtanen from millimetre-wave spectroscopy.
Biver N., Bockelee-Morvan D., Boissier J., Moreno R., Crovisier J.,
Lis D.C., Colom P., Cordiner M., Milam S., Roth N.X., Bonev B.P.,
Dello Russo N., Vervack R.J.Jr, DiSanti M.A.
<Astron. Astrophys. 648, A49 (2021)>
=2021A&A...648A..49B (SIMBAD/NED BibCode)
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ADC_Keywords: Solar system ; Comets ; Radio lines ; Spectra, millimetric/submm
Keywords: comets: general, individual: 46P/Wirtanen -
radio lines: planetary system - submillimeter: planetary system
Abstract:
We present the results of a molecular survey of comet 46P/Wirtanen
undertaken with the IRAM 30-m and NOEMA radio telescopes in December
2018. Observations at IRAM 30-m during the 12-18 Dec. period comprise
a 2mm spectral survey, which covers 25GHz, and a 1mm survey which
covers 62GHz.
The gas outflow velocity and kinetic temperature have been accurately
constrained by the observations. We derive abundances of 11 molecules,
some being identified remotely for the first time in a Jupiter-family
comet, including complex organic molecules such as formamide, ethylene
glycol, acetaldehyde or ethanol. Sensitive upper limits on the
abundances of 24 other molecules are obtained.
The comet is found to be relatively rich in methanol (3.4% relative to
water) but relatively depleted in CO, CS, HNC, HNCO or HCOOH.
Description:
Individual, time averaged, IRAM 30m telescope spectra as presented in
Figs. 2, 3, 4, 5, 13 and wide band spectra of Figs. B.1 and C.1. One
fits file per spectrum, fits output from class.
(http://www.iram.fr/IRAMFR/GILDAS/).