The dead zone size limits in a proto-stellar accretion disc model heated by the damping of Alfvén waves
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- 作者：V. Jatenco-Pereira
- 关键词：MHD ; Plasmas ; Magnetic fields ; Proto ; stellar accretion discs ; Pre ; main sequence stars
- 刊名：Astrophysics and Space Science
- 出版年：2015
- 出版时间：May 2015
- 年：2015
- 卷：357
- 期：1
- 全文大小：638 KB
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1. Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG), Universidade de São Paulo, Rua do Matão 1226, 05508-900, São Paulo, SP, Brazil - 刊物类别：Physics and Astronomy
- 刊物主题：Physics
Astronomy - 出版者：Springer Netherlands
- ISSN：1572-946X
文摘
Heating of proto-stellar accretion discs has been studied by several authors. Jatenco-Pereira (Mon. Not. R. Astron. Soc. 431:3150, 2013) proposed a disc model with two heating mechanisms: the “anomalous” viscosity considered in terms of the α-prescription and the damping of Alfvén waves. As the discs are composed of dust, it was considered that when charged dust particles acquire the same (cyclotron) frequency as the waves, a resonance occurs that leads to the damping of the waves. Here we show that the increase in the temperature of the disc midplane implies in the reduction of the size of the quiescent region in proto-stellar discs and compare it with the actual position of the solar system planets.