تقرير
Dense Molecular Clouds in the Crab Supernova Remnant
| العنوان: | Dense Molecular Clouds in the Crab Supernova Remnant |
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| المؤلفون: | Wootten, Alwyn, Bentley, Rory O., Baldwin, J., Combes, F., Fabian, A. C., Ferland, G. J., Loh, E., Salome, P., Shingledecker, C. N., Castro-Carrizo, A. |
| سنة النشر: | 2021 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Astrophysics of Galaxies, Astrophysics - Solar and Stellar Astrophysics |
| الوصف: | Molecular emission was imaged with ALMA from numerous components near and within bright H2-emitting knots and absorbing dust globules in the Crab Nebula. These observations provide a critical test of how energetic photons and particles produced in a young supernova remnant interact with gas, cleanly differentiating between competing models. The four fields targeted show contrasting properties but within them, seventeen distinct molecular clouds are identified with CO emission; a few also show emission from HCO+, SiO and/or SO. These observations are compared with Cloudy models of these knots. It has been suggested that the Crab filaments present an exotic environment in which H2 emission comes from a mostly-neutral zone probably heated by cosmic rays produced in the supernova surrounding a cool core of molecular gas. Our model is consistent with the observed CO J=3-2 line strength. These molecular line emitting knots in the Crab present a novel phase of the ISM representative of many important astrophysical environments. Comment: ApJ in press, comments welcome |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.3847/1538-4357/ac391a |
| الوصول الحر: | http://arxiv.org/abs/2111.06033Test |
| رقم الانضمام: | edsarx.2111.06033 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.3847/1538-4357/ac391a |
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