The CN isotopic ratios in comets TeX Export

@article{citeulike:5179218, abstract = {Our aim is to determine the isotopic ratios {\$^{12}\$C/\$^{13}\$C}{} and {\$^{14}\$N/\$^{15}\$N}{} in a variety of comets and link these measurements to the formation and evolution of the solar system. The {\$^{12}\$C/\$^{13}\$C}{} and {\$^{14}\$N/\$^{15}\$N}{} isotopic ratios are measured {for} the CN radical by means of high-resolution optical spectra of the R branch of the B-X (0,0) violet band. {23 comets from different dynamical classes} have been observed, sometimes at various heliocentric {and nucleocentric} distances, in order to estimate possible variations of the isotopic ratios in parent molecules. The {\$^{12}\$C/\$^{13}\$C}{} and {\$^{14}\$N/\$^{15}\$N}{} isotopic ratios in CN are remarkably constant (average values of, respectively, \$91.0\pm3.6\$ and \$147.8\pm5.7\$) within our measurement errors, for all comets whatever their origin or heliocentric distance. While the carbon isotopic ratio does agree with the terrestrial value (89), the nitrogen ratio is a factor of two lower than the terrestrial value (272), indicating a fractionation in the early solar system, or in the protosolar nebula, common to all the comets of our sample. This points towards a common origin of the comets independently of their birthplaces, and a relationship between HCN and CN.}, archivePrefix = {arXiv}, author = {Manfroid, J. and Jehin, E. and Hutsem\'{e}kers, D. and Cochran, A. and Zucconi, J. M. and Arpigny, C. and Schulz, R. and St\"{u}we, J. A. and Ilyin, I.}, citeulike-article-id = {5179218}, citeulike-linkout-0 = {http://arxiv.org/abs/0907.0311}, citeulike-linkout-1 = {http://arxiv.org/pdf/0907.0311}, day = {2}, eprint = {0907.0311}, keywords = {astrochemistry, comets, solar\_system, volatile\_delivery}, month = {Jul}, posted-at = {2009-07-16 14:11:08}, priority = {2}, title = {The CN isotopic ratios in comets}, url = {http://arxiv.org/abs/0907.0311}, year = {2009} }

TY - JOUR ID - citeulike:5179218 L3 - citeulike-article-id:5179218 N2 - Our aim is to determine the isotopic ratios {$^{12}$C/$^{13}$C}{} and {$^{14}$N/$^{15}$N}{} in a variety of comets and link these measurements to the formation and evolution of the solar system. The {$^{12}$C/$^{13}$C}{} and {$^{14}$N/$^{15}$N}{} isotopic ratios are measured {for} the CN radical by means of high-resolution optical spectra of the R branch of the B-X (0,0) violet band. {23 comets from different dynamical classes} have been observed, sometimes at various heliocentric {and nucleocentric} distances, in order to estimate possible variations of the isotopic ratios in parent molecules. The {$^{12}$C/$^{13}$C}{} and {$^{14}$N/$^{15}$N}{} isotopic ratios in CN are remarkably constant (average values of, respectively, $91.0\pm3.6$ and $147.8\pm5.7$) within our measurement errors, for all comets whatever their origin or heliocentric distance. While the carbon isotopic ratio does agree with the terrestrial value (89), the nitrogen ratio is a factor of two lower than the terrestrial value (272), indicating a fractionation in the early solar system, or in the protosolar nebula, common to all the comets of our sample. This points towards a common origin of the comets independently of their birthplaces, and a relationship between HCN and CN. TI - The CN isotopic ratios in comets KW - astrochemistry KW - comets KW - solar_system KW - volatile_delivery AU - Manfroid, J AU - Jehin, E AU - Hutsemékers, D AU - Cochran, A AU - Zucconi, JM AU - Arpigny, C AU - Schulz, R AU - Stüwe, JA AU - Ilyin, I PY - 2009/Jul/02/ UR - http://arxiv.org/abs/0907.0311 ER -