|
|||||
|
|
Nitrogen Sulfide In Comets Hyakutake (C/1996 B2) And Hale–Bopp (C/1995 O1) |
|
| Authors: | Canaves Marcus V De Almeida Amaury A Boice Daniel C Sanzovo Gilberto C |
| Institution: | 1.Department of Astronomy, Institute of Astronomy, Geophysics and Atmospheric Sciences, University of S?o Paulo, Main Campus, Rua do Mat?o, 1226, CEP 05508-0900, S?o Paulo, S?o Paulo, Brazil ;2.Department of Space Science, Instrumentation and Space Research Division, Southwest Research Institute, P.O. Drawer 28510, San Antonio, Texas, 78228-0510, USA ;3.Laboratory of Molecular Astrophysics, Department of Physics, State, University of Londrina, Perobal, CEP 86051-970, Londrina, Paraná, Brazil ; |
| Abstract: | The chemistry of both nitrogen and sulfur presents interesting problems in comets.In this paper, we use a model of cometary comae with gas-phase chemical kineticsand gas dynamics to predict molecular abundances in the inner coma region for twoof the brightest comets in the past 20 years, Hyakutake (C/1996 B2) and Hale–Bopp(C/1995 O1). In this progress report we concentrate on the gas-phase chemistry of thenitrogen sulfide (NS) radical at a heliocentric distance of 1 AU to study the abundanceof NS using a detailed photo and chemical reaction network with over 100 species andabout 1000 reactions. The results are compared with recent observations of CometHale–Bopp and reveal that conventional gas-phase reactions schemes do not produceNS in sufficient quantities to explain the observations. We plan to continue therefinement of the model to improve agreement with observational constraints. |
| Keywords: | Abundance comet C/1995 O1 Hale– Bopp comet C/1996 B2 Hyakutake cometary comae nitrogen sulfide |
| 本文献已被 SpringerLink 等数据库收录！ | |