Interaction of high-speed and transient fluxes of solar wind at the maximum of solar cycle 24

The interaction of the interplanetary coronal mass ejection (ICME) and the high-speed solar wind flux (HSSWF) associated with the coronal hole (CH) is considered. By the examples of two events at the maximum of solar cycle 24 from June 4 to June 16 and from June 30 to July 10, 2012 it is shown that the temperature-dependent parameters of the SW ionic composition appear closer to the values in the HSSWF than in the ICME due to mixing of fluxes in the corona when the ICME source is near the CH boundary.     

Geomagnetic Storms and Forbush-Decreases Related to Single and Complex Transient Structures of Solar Wind

Bulletin of the Lebedev Physics Institute - The geoeffectiveness of single and complex transient structures of the solar wind (SW), formed by coronal mass ejections (CMEs) and associated Forbush...     

The TESIS Solar imaging spectroscopy experiment on board the CORONAS-Photon satellite

The CORONAS-Photon spacecraft was successfully launched in January 2009. Its scientific payload included the TESIS complex of telescopes and spectrometers, designed to obtain high spectral, temporal and spatial resolution solar corona images in soft X-ray to far UV spectral range.     

Prediction of geoeffective solar wind streams near earth according to solar observational data

A semi-empirical model for predicting solar wind (SW) streams is developed based on satellite images of the Sun and corona using a hierarchical approach. The model allows simultaneous calculation of the parameters of all three SW components, i.e., slow SW, high-speed streams from coronal holes, and interplanetary coronal mass ejections, as well as the detection of their possible interaction in the heliosphere.     

Photometry of solar EUV radiation by space-based telescopes with normal incidence multilayer-coated optics

Photometric methods of image analysis in the extreme ultraviolet (EUV) wavelength range are widely used in solving current scientific problems of solar physics. Types of solar EUV telescopes, their main parameters, effects of space flight and observation conditions on accuracy of the photometric analysis are considered.     

Investigation of the solar transition layer and corona by the method of imaging XUV spectroscopy in the terek and res experiments on board the KORONAS-I satellite

The method of imaging XUV spectroscopy was used to study plasma in the transition layer and inner corona of the Sun with temperatures 10⁵–10⁷ K in the TEREK and RES experiments on board KORONAS-I. The observations were carried out in the period from March 12 to July 5, 1994. The spectral images and their correlation with the YOHKOH X-ray images and groundbased observations are important for the study of the physical conditions and modeling of the bulk processes in the quiet Sun plasma, including active regions, corona holes, and overlimb structures.