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Large excess of heavy nitrogen in both hydrogen cyanide and cyanogen from comet 17P/Holmes
D. Bockelée-Morvan, N. Biver, E. Jehin +15
From millimeter and optical observations of the Jupiter-family comet 17P/Holmes performed soon after its huge outburst of October 24, 2007, we derive 14 N/15N = 139 +/- 26 in HCN,…
Interferometric imaging of the sulfur-bearing molecules H2S, SO and CS in comet C/1995 O1 (Hale-Bopp)
J. Boissier, D. Bockelée-Morvan, N. Biver +4
We present observations of rotational lines of H2S, SO and CS performed in comet C/1995 O1 (Hale-Bopp) in March 1997 with the Plateau de Bure interferometer (IRAM). The observation…
Water in Comet 2/2003 K4 (LINEAR) with Spitzer
Charles E. Woodward, Michael S. Kelley, Dominique Bockelee-Morvan +1
We present sensitive 5.5 to 7.6 micron spectra of comet C/2003 K4 (LINEAR) obtained on 16 July 2004 (r_{h} = 1.760 AU, Delta_{Spitzer} = 1.409 AU, phase angle 35.4 degrees) with th…
Cometary water expansion velocity from OH line shapes
W. -L. Tseng, D. Bockelée-Morvan, J. Crovisier +2
We retrieve the H_2O expansion velocity in a number of comets, using the 18-cm line shapes of the OH radical observed with the Nançay radio telescope. The H_2O velocity is derived…
Submillimetre observations of comets with Odin: 2001-2005
N. Biver, D. Bockelée-Morvan, J. Crovisier +7
The Odin satellite, launched in Feb. 2001, is equipped with a 1.1-m submillimetre telescope. Odin was used to observe the 557 GHz line of water with high spectral resolution in 12…
Radio observations of comet 9P/Tempel 1 before and after Deep Impact
N. Biver, D. Bockelée-Morvan, J. Boissier +14
Comet 9P/Tempel 1 was the target of a multi-wavelength worldwide investigation in 2005. The NASA Deep Impact mission reached the comet on 4.24 July 2005, delivering a 370 kg impact…