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Coronal expansion and the transfer of solar angular momentum to the interplanetary space |
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| Authors: | Li Zhong-yuan Chen Zong-yi and Mo Guo-biao |
| Institution: | a Department of Earth and Space Sciences, University of Science & Technology of China, Hefei, 230026, China b Shanghai Observatory, Chinese Academy of Science, Shanghai, 200030, China |
| Abstract: | We discuss the question of loss of angular momentum through coronal expansion. From a large volume of data on Type-1 cometary tails we have confirmed the presence of a tangential component in the coronal expansion, which has not only a stochastic component but also a constant component of 9.8 km/s. Through coronal expansion the Sun has lost 80% of its angular momentum since it evolved on to the main sequence and the angular velocity of the Sun is decreasing exponentially. This result should have a large effect on the dynamical evolution of the Sun. |
| Keywords: | Coronal expansion interplanetary magnetic field Type-I comets space plasma |
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