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2019
Authors: Telloni Daniele, Giordano Silvio, and Antonucci Ester
Title: On the Fast Solar Wind Heating and Acceleration Processes: A Statistical Study Based on the UVCS Survey Data
Abstract:

The UltraViolet Coronagraph Spectrometer (UVCS) on board the SOlar and Heliospheric Observatory has almost continuously observed, throughout the whole solar cycle 23, the UV solar corona. This work addresses the first-ever statistical analysis of the daily UVCS observations, performed in the O VI channel, of the northern polar coronal hole, between 1.5 and 3 R , during the period of low solar activity from 1996 April to 1997 December. The study is based on the investigation, at different heights, of the correlation between the variance of the O VI 1031.92 Å spectral line and the O VI 1031.92, 1037.61 Å doublet intensity ratio, which are proxies of the kinetic temperature of the O5+ ions and of the speed of the oxygen component of the fast solar wind, respectiv. . .
Date: 08/2019 Publisher: The Astrophysical Journal Pages: L36 DOI: 10.3847/2041-8213/ab3731 Available at: https://iopscience.iop.org/article/10.3847/2041-8213/ab3731
More Details

Authors: Telloni Daniele, Giordano Silvio, and Antonucci Ester
Title: On the Fast Solar Wind Heating and Acceleration Processes: A Statistical Study Based on the UVCS Survey Data
Abstract:

The UltraViolet Coronagraph Spectrometer (UVCS) on board the SOlar and Heliospheric Observatory has almost continuously observed, throughout the whole solar cycle 23, the UV solar corona. This work addresses the first-ever statistical analysis of the daily UVCS observations, performed in the O VI channel, of the northern polar coronal hole, between 1.5 and 3 R , during the period of low solar activity from 1996 April to 1997 December. The study is based on the investigation, at different heights, of the correlation between the variance of the O VI 1031.92 Å spectral line and the O VI 1031.92, 1037.61 Å doublet intensity ratio, which are proxies of the kinetic temperature of the O5+ ions and of the speed of the oxygen component of the fast solar wind, respectiv. . .
Date: 08/2019 Publisher: The Astrophysical Journal Pages: L36 DOI: 10.3847/2041-8213/ab3731 Available at: https://iopscience.iop.org/article/10.3847/2041-8213/ab3731
More Details