Free Access

Table 3

Abundances (with respect to water) of relevant molecules measured for the three comets where HNCO and formamide have been observed.

Species Abundance (% of H2O) References
Hale-Bopp Lemmon Lovejoy

CO 2.3 4.0 7.2 Bockelée-Morvan et al. (2000), Biver et al. (2014)
N2 0.013 0.023 0.041 estimated from Rubin et al. (2015)
HNCO 0.1 0.025 0.021 Bockelée-Morvan et al. (2000), Paganini et al. (2014a)
NH2HCO 0.02 0.06 0.021 Bockelée-Morvan et al. (2000), Biver et al. (2014)
NH3 1–1.8 0.63 1.86 Biver et al. (2014), Paganini et al. (2014a, b)

HNCO/N in N2 3.85 0.55 0.26
NH2HCO/N in N2 0.77 1.3 0.26
HNCO/NH3 0.06–0.1 0.04 0.01
NH2HCO/NH3 0.01–0.02 ≥ 0.01 0.01

Notes. The ratios of HNCO and formamide with respect to nitrogen atoms in N2 or in NH3 are also reported.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.