تقرير
Discovery of molecular hydrogen in SN 1987A
| العنوان: | Discovery of molecular hydrogen in SN 1987A |
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| المؤلفون: | Fransson, Claes, Larsson, Josefin, Spyromilio, Jason, Leibundgut, Bruno, McCray, Richard, Jerkstrand, Anders |
| سنة النشر: | 2016 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Solar and Stellar Astrophysics |
| الوصف: | Both CO and SiO have been observed at early and late phases in SN 1987A. H_2 was predicted to form at roughly the same time as these molecules, but was not detected at early epochs. Here we report the detection of NIR lines from H_2 at 2.12 mu and 2.40 mu in VLT/SINFONI spectra obtained between days 6489 and 10,120. The emission is concentrated to the core of the supernova in contrast to H-alpha and approximately coincides with the [Si I]/[Fe II] emission detected previously in the ejecta. Different excitation mechanisms and power sources of the emission are discussed. From the nearly constant H_2 luminosities we favour excitation resulting from the 44Ti decay. Comment: 5 pages 3 figures, accepted for ApJ Letters |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.3847/2041-8205/821/1/L5 |
| الوصول الحر: | http://arxiv.org/abs/1603.05560Test |
| رقم الانضمام: | edsarx.1603.05560 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.3847/2041-8205/821/1/L5 |
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