تقرير
Initial Speed of Knots in the Plasma Tail of C/2013 R1(Lovejoy)
| العنوان: | Initial Speed of Knots in the Plasma Tail of C/2013 R1(Lovejoy) |
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| المؤلفون: | Yagi, Masafumi, Koda, Jin, Furusho, Reiko, Terai, Tsuyoshi, Fujiwara, Hideaki, Watanabe, Jun-ichi |
| سنة النشر: | 2014 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Earth and Planetary Astrophysics |
| الوصف: | We report short-time variations in the plasma tail of C/2013 R1(Lovejoy). A series of short (two to three minutes) exposure images with the 8.2-m Subaru telescope shows faint details of filaments and their motions over 24 minutes observing duration. We identified rapid movements of two knots in the plasma tail near the nucleus (~ 3 x 10^5 km). Their speeds are 20 and 25 km/s along the tail and 3.8 and 2.2 km/s across it, respectively. These measurements set a constraint on an acceleration model of plasma tail and knots as they set the initial speed just after their formation. We also found a rapid narrowing of the tail. After correcting the motion along the tail, the narrowing speed is estimated to be ~ 8 km/s. These rapid motions suggest the need for high time-resolution studies of comet plasma tails with a large telescope. Comment: 13 pages, 7 figures; AJ accepted |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1088/0004-6256/149/3/97 |
| URL الوصول: | http://arxiv.org/abs/1403.1346 |
| رقم الأكسشن: | edsarx.1403.1346 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1088/0004-6256/149/3/97 |
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