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| Paper: |
MHD Heating in Dusty Proto-Stellar Accretion Disks Midplane |
| Volume: |
464, Circumstellar Dynamics at High Resolution |
| Page: |
365 |
| Authors: |
Jatenco-Pereira, V. |
| Abstract: |
A minimum amount of ionization in proto-stellar accretion disks is necessary
for the magneto-rotational instability (MRI) to take place, leading to
accretion of material towards the central star. As proto-stellar disks are
composed of dust, in this work we consider the damping of Alfvén waves due
to dust-cyclotron resonances as an additional heating mechanism to viscous
accretion disks. When charged grains become coupled to the waves, they
introduce a cutoff (resonance) in the Alfvén wave spectrum, providing an
important damping mechanism for the waves. Here, we show that the damping of
the waves can increase the temperature of the disk, resulting in an increase
on the ionization fraction, thus reducing the extension of quiescent zones in
the disk. |
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