Molecular cloud formation in high-shear, magnetized colliding flows

التفاصيل البيبلوغرافية
العنوان: Molecular cloud formation in high-shear, magnetized colliding flows
المؤلفون: Fabian Heitsch, C. Haig, E. Fogerty, Jonathan Carroll-Nellenback, Adam Frank, Marissa Adams
بيانات النشر: arXiv, 2016.
سنة النشر: 2016
مصطلحات موضوعية: Physics, geography, geography.geographical_feature_category, 010308 nuclear & particles physics, Star formation, Molecular cloud, FOS: Physical sciences, Astronomy and Astrophysics, Mechanics, 01 natural sciences, Astrophysics - Astrophysics of Galaxies, Sink (geography), Magnetic field, Classical mechanics, Shear (geology), Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), 0103 physical sciences, Gravitational collapse, Oblique shock, Magnetohydrodynamics, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Solar and Stellar Astrophysics (astro-ph.SR)
الوصف: The colliding flows (CF) model is a well-supported mechanism for generating molecular clouds. However, to-date most CF simulations have focused on the formation of clouds in the normal-shock layer between head-on colliding flows. We performed simulations of magnetized colliding flows that instead meet at an oblique-shock layer. Oblique shocks generate shear in the post-shock environment, and this shear creates inhospitable environments for star formation. As the degree of shear increases (i.e. the obliquity of the shock increases), we find that it takes longer for sink particles to form, they form in lower numbers, and they tend to be less massive. With regard to magnetic fields, we find that even a weak field stalls gravitational collapse within forming clouds. Additionally, an initially oblique collision interface tends to reorient over time in the presence of a magnetic field, so that it becomes normal to the oncoming flows. This was demonstrated by our most oblique shock interface, which became fully normal by the end of the simulation.
Comment: MNRAS, in press, Monthly Notices of the Royal Astronomical Society 2016
DOI: 10.48550/arxiv.1602.01417
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::634eaa0236cfebaaed6d0928a066dcadTest
حقوق: OPEN
رقم الانضمام: edsair.doi.dedup.....634eaa0236cfebaaed6d0928a066dcad
قاعدة البيانات: OpenAIRE