J/A+A/566/L5 C/2012 F6 (Lemmon) and C/2013 R1 (Lovejoy) spectra (Biver+, 2014)
Complex organic molecules in comets C/2012 F6 (Lemmon) and C/2013 R1 (Lovejoy):
detection of ethylene glycol and formamide.
Biver N., Bockelee-Morvan D., Debout V., Crovisier J., Boissier J.,
Lis D.C., Dello Russo N., Moreno R., Colom P., Paubert G., Vervack R.,
Weaver H.A.
<Astron. Astrophys. 566, L5 (2014)>
=2014A&A...566L...5B 2014A&A...566L...5B
ADC_Keywords: Comets ; Radio lines ; Spectra, millimetric/submm
Keywords: astrobiology - astrochemistry -
comets: individual: C/2012 F6 (Lemmon) -
comets: individual: C/2013∼R1 (Lovejoy) -
radio lines: planetary systems - submillimeter: planetary systems
Abstract:
A spectral survey in the 1mm wavelength range was undertaken in the
long-period comets C/2012 F6 (Lemmon) and C/2013 R1 (Lovejoy) using
the 30m telescope of the Institut de radioastronomie millimetrique
(IRAM) in April and November-December 2013. We report the detection of
ethylene glycol (CH2OH)2 (aGg' conformer) and formamide (NH_2CHO) in
the two comets. The abundances relative to water of ethylene glycol
and formamide are 0.2-0.3% and 0.02% in the two comets, similar to
the values measured in comet C/1995 O1 (Hale-Bopp). We also report the
detection of HCOOH and CH3CHO in comet C/2013 R1 (Lovejoy), and a
search for other complex species (methyl formate, glycolaldehyde).
Description:
Sum spectra of the lines of formamide and ethylene-glycol which
intensities are listed in Tables 4 and 5. One fits file per spectrum,
fits output from class (http://www.iram.fr/IRAMFR/GILDAS/).
object.dat :
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Code Name Elem q e i H1
d AU deg mag
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C/2012 F6 Lemmon 2456375.5 0.7312461 0.9985125 82.607966 7.96
C/2013 R1 Lovejoy 2456651.5 0.8118182 0.9983297 64.040457 11.66
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 118 18 List of FITS spectra
sp/* . 18 Individual FITS spectra
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See also:
J/A+A/564/L2 : CH3OH line parameters in comets ISON & Lovejoy (Agundez+, 2014)
Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Name Comet name
9- 11 I3 --- Nx Number of channels
13- 20 F8.4 MHz Df0 Lower value of frequency interval
22- 29 F8.4 MHz Df1 Upper value of frequency interval
32- 39 F8.6 MHz df Frequency resolution
41- 49 F9.5 GHz Freq Rest frequency of the transition
51- 52 I2 Kibyte size [11] Size of FITS file
54- 65 A12 --- FileName Name of the fits file in subdirectory sp
67-118 A52 --- Title Title of the file
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Acknowledgements:
Nicolas Biver, Nicolas.Biver(at)obspm.fr
(End) Patricia Vannier [CDS] 19-Jun-2014