Table of Contents
Journal of Astrophysics
Volume 2013, Article ID 368380, 9 pages
http://dx.doi.org/10.1155/2013/368380
Research Article

The Total Solar Irradiance, UV Emission and Magnetic Flux during the Last Solar Cycle Minimum

1Pulkovo Astronomical Observatory, Pulkovskoe sh. 65, Saint Petersburg 196140, Russia
2Saint Petersburg State University, Saint Petersburg 198504, Russia
3Karpov Institute of Physical Chemistry, Ul. Vorontsovo Pole 10, Moscow 105064, Russia

Received 29 March 2013; Revised 31 May 2013; Accepted 23 June 2013

Academic Editors: A. Caliandro, A. Cellino, A. Meli, J. F. Valdés-Galicia, and S. Wedemeyer-Bohm

Copyright © 2013 E. E. Benevolenskaya and I. G. Kostuchenko. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We have analyzed the total solar irradiance (TSI) and the spectral solar irradiance as ultraviolet emission (UV) in the wavelength range 115–180 nm, observed with the instruments TIM and SOLSTICE within the framework of SORCE (the solar radiation and climate experiment) during the long solar minimum between the 23rd and 24th cycles. The wavelet analysis reveals an increase in the magnetic flux in the latitudinal zone of the sunspot activity, accompanied with an increase in the TSI and UV on the surface rotation timescales of solar activity complexes. In-phase coherent structures between the midlatitude magnetic flux and TSI/UV appear when the long-lived complexes of the solar activity are present. These complexes, which are related to long-lived sources of magnetic fields under the photosphere, are maintained by magnetic fluxes reappearing in the same longitudinal regions. During the deep solar minimum (the period of the absence of sunspots), a coherent structure has been found, in which the phase between the integrated midlatitude magnetic flux is ahead of the total solar irradiance on the timescales of the surface rotation.