naa a22 4500 510790003 CHVBK 20180411083316.0 cr unu---uuuuu 180411e20130701xx s 000 0 eng 10.1134/S1063773713070049 doi (NATIONALLICENCE)springer-10.1134/S1063773713070049 Dependence of the solar wind speed on the coronal magnetic field in cycle 23 [Elektronische Daten] [N. Lotova, V. Obridko] The dependence of the position of the solar wind sonic point on the magnetic field in the solar corona during cycle 23 is studied. This dependence is shown to be rather strong in the rising phase and at the cycle maximum. As the coronal magnetic field grows, the distance to the sonic point decreases. Since the distance to the sonic point has been shown previously to anticorrelate with the solar wind speed, the result obtained suggests a strong positive correlation between the later and the coronal magnetic field. The situation changed dramatically two years after the calendar date of the cycle maximum. Beginning in 2004 the solar wind speed ceased to depend on the magnetic field up until the cycle minimum in December 2008. In 2009 a strong dependence of the wind speed on the coronal magnetic field was restored. It is hypothesized that this effect is associated with two different coronal heating mechanisms whose relative efficiency, in turn, depends on the contribution from magnetic fields of different scales. Pleiades Publishing, Ltd., 2013 solar magnetic field nationallicence solar wind nationallicence radio occultation method nationallicence Lotova N. Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation (IZMIRAN), Russian Academy of Sciences, 142190, Troitsk, Moscow oblast, Russia aut Obridko V. Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation (IZMIRAN), Russian Academy of Sciences, 142190, Troitsk, Moscow oblast, Russia aut Astronomy Letters Springer US; http://www.springer-ny.com 39/7(2013-07-01), 474-480 1063-7737 39:7<474 2013 39 11443 https://doi.org/10.1134/S1063773713070049 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1063773713070049 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lotova N. Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation (IZMIRAN), Russian Academy of Sciences, 142190, Troitsk, Moscow oblast, Russia aut NATIONALLICENCE 700 1- Obridko V. Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation (IZMIRAN), Russian Academy of Sciences, 142190, Troitsk, Moscow oblast, Russia aut NATIONALLICENCE 773 0- Astronomy Letters Springer US; http://www.springer-ny.com 39/7(2013-07-01), 474-480 1063-7737 39:7<474 2013 39 11443 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer