LARGE EXCESS OF HEAVY NITROGEN IN BOTH HYDROGEN CYANIDE AND CYANOGEN FROM COMET 17P/HOLMES

摘要

From millimeter and optical observations of the Jupiter-family comet 17P/Holmes performed soon after its huge outburst of 2007 October 24, we derive ~(14)N/~(15)N = 139 ± 26 in HCN and ~(14)N/~(15)N = 165 ± 40 in CN, establishing that HCN has the same non