کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1780496 | 1523805 | 2006 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
How do we mix supernova ejecta to reproduce isotopic ratios of presolar grains?
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
نجوم و فیزیک نجومی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: How do we mix supernova ejecta to reproduce isotopic ratios of presolar grains? How do we mix supernova ejecta to reproduce isotopic ratios of presolar grains?](/preview/png/1780496.png)
چکیده انگلیسی
We investigate the mixing ratios of the supernova mixtures reproducing as many as possible of the 12C/13C, 14N/15N, 26Al/27Al, 29Si/28Si, 30Si/28Si, and 44Ti/48Ti isotopic ratios measured in two presolar grains from supernovae. We consider the mixing of seven layers of supernova ejecta, i.e., the Ni, Si/S, O/Si, O/Ne, C/O or O/C, He/C, and He/N layers. Five isotopic ratios of the grains are reproduced by mixtures at the maximum. The mixtures should mainly contain the He/N layer to reproduce 12C/13C and to be the C/O ratio slightly larger than unity. The Ni layer should be included for the grains with high 44Ti/48Ti ratios. Including too much material from O-rich layers is not appropriate because of their small C/O ratios.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: New Astronomy Reviews - Volume 50, Issues 7â8, October 2006, Pages 600-603
Journal: New Astronomy Reviews - Volume 50, Issues 7â8, October 2006, Pages 600-603
نویسندگان
Takashi Yoshida,