Thermal instability of thin accretion disks in the presence of wind and toroidal magnetic field
arXiv:1911.06645 · doi:10.3847/1538-4357/ab5793
Abstract
We study the local thermal stability of thin accretion disks. We present a full stability analysis in the presence of a magnetic field and more importantly wind. For wind, we use a general model suitable for adequately describing several kinds of winds. First, we explicitly show that the magnetic field, irrespective of the type of wind, has a stabilizing effect. This is also true when there is no wind. In this case, we confirm the other works already presented in the literature. However, our main objective is to investigate the local thermal stability of the disk in the presence of the wind. In this case, interestingly, the response of disk is directly related to the type of wind. In other words, in some cases, the wind can stabilize the disk. On the other hand, in some cases, it can destabilize the disk. We found that in some thin disk models where the magnetic pressure cannot explain the stability of the disk by including a typical contribution for magnetic pressure, the wind can provide a viable explanation for the thermal stability.
arXiv commentAccepted for publication in ApJ
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