تقرير
Discovery of shocked H2 around OH 231.8+4.2
| العنوان: | Discovery of shocked H2 around OH 231.8+4.2 |
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| المؤلفون: | Forde, K. P., Gledhill, T. M. |
| سنة النشر: | 2011 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Solar and Stellar Astrophysics |
| الوصف: | We present K-band integral field observations of the circumstellar envelope of the evolved star OH 231.8+4.2. Spatial and spectral information were simultaneously acquired using the Sinfoni integral field unit, with adaptive optics, on the Very Large Telescope. The observations reveal the discovery of H2 emission (1) around the centre of the nebula and (2) located in clumps along the Western side of the Northern lobe, presumably associated with the strong shocks that stimulate the previously reported H-alpha emission at the same location. An observed H2 1-0/2-1S(1) line ratio of 8.3+/-1.9 was calculated for the central field, a value consistent with shock excitation. Comment: 5 pages, 4 figures, accepted for publication in MNRAS Letters |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1111/j.1745-3933.2011.01204.x |
| URL الوصول: | http://arxiv.org/abs/1112.1025 |
| رقم الأكسشن: | edsarx.1112.1025 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1111/j.1745-3933.2011.01204.x |
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