Mathematics – Logic
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21725103k&link_type=abstract
American Astronomical Society, AAS Meeting #217, #251.03; Bulletin of the American Astronomical Society, Vol. 43, 2011
Mathematics
Logic
Scientific paper
Dust grains are an important component of star-forming molecular clouds. Grains play a fundamental role in interstellar chemistry, and as a consequence of this, they may contribute to reactions of astrobiological interest. Under typical conditions, most dust grains are electrically charged, and will be a source of electrical current, in addition to gas-phase ions and electrons. Depending on their size, the gas density, and the field strength, charged dust grains can couple to the magnetic field and become loaded onto the field lines threading a cloud. As a result of this coupling, grains can significantly alter magnetohydrodynamic (MHD) phenomena in star-forming regions.
Using linear algebra and Fourier transform methods, we have created a numerical code that calculates the time-dependent evolution of MHD disturbances that propagate perpendicular to the direction of the magnetic field within weakly ionized, dusty interstellar clouds and cores. We apply this code to a model of colliding clouds to study the formation and early-time evolution of hydromagnetic waves and shocks. The results of models with grains that are either poorly coupled or strongly coupled to the magnetic field are described and contrasted. We find that in clouds with strong coupling, the inertia added by grain loading on magnetic field lines dramatically reduces the rate at which a MHD signal --- the forerunner to a magnetic precursor --- propagates ahead of the shock, compared to that which occurs in models with poorly coupled grains.
Ciolek Glenn E.
Katz Max P.
Roberge Wayne G.
No associations
LandOfFree
Driven Hydromagnetic Waves and Shocks in Dusty Interstellar Clouds does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Driven Hydromagnetic Waves and Shocks in Dusty Interstellar Clouds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Driven Hydromagnetic Waves and Shocks in Dusty Interstellar Clouds will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1399435