Academic Journal
A primordial origin for the atmospheric methane of Saturn’s moon Titan, Icarus
| العنوان: | A primordial origin for the atmospheric methane of Saturn’s moon Titan, Icarus |
|---|---|
| المؤلفون: | Olivier Mousis, Jonathan I Lunine, Matthew Pasek, Daniel Cordier, J Hunter, Waite E Jr, Kathleen E Mandt, William S Lewis, Mai-Julie Nguyen |
| المساهمون: | The Pennsylvania State University CiteSeerX Archives |
| المصدر: | http://inms.space.swri.edu/publications/2009/Mousis_et_al_2009b.pdf. |
| سنة النشر: | 2009 |
| المجموعة: | CiteSeerX |
| الوصف: | a b s t r a c t The origin of Titan's atmospheric methane is a key issue for understanding the origin of the saturnian satellite system. It has been proposed that serpentinization reactions in Titan's interior could lead to the formation of the observed methane. Meanwhile, alternative scenarios suggest that methane was incorporated in Titan's planetesimals before its formation. Here, we point out that serpentinization reactions in Titan's interior are not able to reproduce the deuterium over hydrogen (D/H) ratio observed at present in methane in its atmosphere, and would require a maximum D/ H ratio in Titan's water ice 30% lower than the value likely acquired by the satellite during its formation, based on Cassini observations at Enceladus. Alternatively, production of methane in Titan's interior via radiolytic reactions with water can be envisaged but the associated production rates remain uncertain. On the other hand, a mechanism that easily explains the presence of large amounts of methane trapped in Titan in a way consistent with its measured atmospheric D/H ratio is its direct capture in the satellite's planetesimals at the time of their formation in the solar nebula. In this case, the mass of methane trapped in Titan's interior can be up to $1300 times the current mass of atmospheric methane. |
| نوع الوثيقة: | text |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1080.3493; http://inms.space.swri.edu/publications/2009/Mousis_et_al_2009b.pdf |
| الاتاحة: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1080.3493 http://inms.space.swri.edu/publications/2009/Mousis_et_al_2009b.pdf |
| Rights: | Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
| رقم الانضمام: | edsbas.22F22169 |
| قاعدة البيانات: | BASE |
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