Hostname: page-component-586b7cd67f-t7fkt Total loading time: 0 Render date: 2024-11-24T09:04:05.976Z Has data issue: false hasContentIssue false
  • English
  • Français

Peculiar Current Solar-Minimum Structure of the Heliosphere

Published online by Cambridge University Press:  21 October 2010

P. K. Manoharan
P. K. Manoharan*
Affiliation:
Radio Astronomy Centre, National Centre for Radio Astrophysics, Tata Institute of Fundamental Research, Udhagamandalam (Ooty), 643001, India email: [email protected]
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

In this paper, I review the results of 3-D evolution of the inner heliosphere over the solar cycle 23, based on observations of interplanetary scintillation (IPS) made at 327 MHz using the Ooty Radio Telescope. The large-scale features of solar wind speed and density turbulence of the current minimum are remarkably different from that of the previous cycle. The results on the solar wind density turbulence show that (1) the current solar minimum is experiencing a low level of coronal density turbulence, to a present value of ~50% lower than the previous similar phase, and (2) the scattering diameter of the corona has decreased steadily after the year 2003. The results on solar wind speed are consistent with the magnetic field strength at the poles and the warping of heliospheric current sheet.

Keywords

turbulencescatteringSun: coronaSun: magnetic fieldsSun: coronal mass ejections (CMEs)solar windsolar-terrestrial relations
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Highlights H15: Highlights of Astronomy , November 2009 , pp. 484 - 487
Copyright
Copyright © International Astronomical Union 2010

References

Choudhuri, A. R., Chatterjee, P., & Jiang, J. 2007, Phy. Rev. Lett., 98, 131103CrossRefGoogle Scholar
Lee, C. O. et al. 2009, Solar Physics, 256, 345CrossRefGoogle Scholar
Manoharan, P. K. 1993, Solar Physics, 148, 153CrossRefGoogle Scholar
Manoharan, P. K. et al. 2000, ApJ, 530, 1061CrossRefGoogle Scholar
Manoharan, P. K. 2006, Solar Physics, 235, 345CrossRefGoogle Scholar
Manoharan, P. K. 2008, in Dwivedi, B. N. & Narain, U. (eds.), Physics of the Sun and its Atmosphere, (World Scientific, Singapore), p235–266CrossRefGoogle Scholar
McComas, D. J. et al. 2008, Geophys. Res. Lett., 35, 18103Google Scholar
Sheeley, N. R. Jr. 2008, ApJ, 680, 1553CrossRefGoogle Scholar
Smith, E. J. & Balogh, A. 2008, Geophys. Res. Lett., 35, L22103Google Scholar
Swarup, G. et al. 1971, Nature Phys. Sci., 230, 185CrossRefGoogle Scholar
Tokumaru, M. et al. 2009, Geophys. Res. Lett., 36, L091001CrossRefGoogle Scholar
Yashiro, S. et al. 2004, J. Goephys. Res., 109, 7105CrossRefGoogle Scholar