کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1765710 | 1020115 | 2009 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Catalytic activity of interstellar grains: Formation of molecular hydrogen on amorphous silicates
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم فضا و نجوم
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Catalytic activity of interstellar grains: Formation of molecular hydrogen on amorphous silicates Catalytic activity of interstellar grains: Formation of molecular hydrogen on amorphous silicates](/preview/png/1765710.png)
چکیده انگلیسی
Silicates constitute an important class of interstellar grain material and are the site of catalytic activities, most notably the formation of molecular hydrogen. Here we report an analysis of experiments conducted in the laboratory to measure the efficiency of formation of molecular hydrogen on amorphous silicates, a realistic analogue of interstellar dust grains. From the measurements, we also obtain the energetics of key processes in the reaction and information on the mechanism of reaction. Comparison with earlier measurements of molecular hydrogen formation on a sample of polycrystalline olivine shows that amorphous materials are more efficient catalysts.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Advances in Space Research - Volume 43, Issue 8, 15 April 2009, Pages 1291-1298
Journal: Advances in Space Research - Volume 43, Issue 8, 15 April 2009, Pages 1291-1298
نویسندگان
Gianfranco Vidali, Ling Li, Joseph E. Roser, Ryan Badman,