Computer Science
Scientific paper
Sep 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aipc..784..654v&link_type=abstract
MAGNETIC FIELDS IN THE UNIVERSE: From Laboratory and Stars to Primordial Structures. AIP Conference Proceedings, Volume 784, pp
Computer Science
Accretion Disks, Magnetohydrodynamic Waves, Pre-Main-Sequence Stars, Accretion And Accretion Disks, Magnetohydrodynamics And Plasmas, Pre-Main Sequence Objects, Young Stellar Objects And Protostars
Scientific paper
Protostellar accretion disks are structures that are formed around young stars. Despite the many advances in the understanding of these objects, their temperature structure is not yet known. In this work we continue the investigation of heating caused by damping of Alfvén waves. It was considered, in a self consistent way, collisional and viscous-resistive damping. The heating generated by these mechanisms was compared with traditional heating sources such as viscous dissipation and reprocessing of star's radiation within the disk. The frequency and the amplitude of the waves was constrained. The results show that there is an increase of the effective temperature of the outer regions of the disk, consistent with recent H2 observations. The ionization degree increases and has a value that depends on the frequency of the waves and on their amplitudes.
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