Aryana Libris

Authors : Balogh André - Lanzerotti Louis J. - Suess Steven T.
Title : The heliosphere through the solar activity cycle
Year : 2008

Link download : Balogh_Andre_-_The_heliosphere_through_the_solar_activity_cycle.zip

Preface. Since its inauguration in 1979 and launch in 1990, the joint European Space Agency (ESA)/National Aeronautics and Space Administration (NASA) solar polar Ulysses mission has produced transformational new insights into the dynamics of the heliosphere. The motivation for this book is the desire to provide a unique record of the heliospheric environment through a complete 11-year solar activity cycle, from the Sun to the orbit of Jupiter. This is now possible, thanks to opportunities provided by observations of the Sun using ground-based techniques as well as important vantage points in space, including the unique out-of-ecliptic orbit of Ulysses. The close connection between the solar cycle and the state of the heliosphere is well recognized; however, the just completed solar cycle 23 resulted in much important progress in gathering and combining solar observations and in situ observations in space. Although the Editors and contributing authors of this volume are associated principally with the Ulysses mission, the book is intended to provide a status report on contemporary understanding of the heliosphere that has been achieved using the many sources of data and observations available since the early to mid-1990s. The story of the heliosphere is longer than that of space sciences: 2007 commemorates 50 years of space research, but almost 100 years of heliospheric research. Heliospheric research was born of cosmic ray research that started in 1912; the connection of the variations in cosmic ray intensity, as well as associations of sudden decreases in cosmic ray intensity following solar flares, was recognized before the first measurements made in space. In the first decade and more following the launch of Sputnik during the International Geophysical Year (5 October 1957), space around the Earth was the new frontier, ever expanding as space probes moved farther and farther from their Earth origin. The wealth of data acquired by numerous spacecraft in Earth orbit, but which probed the medium beyond the Earth’s own volume of space (the magnetosphere), gave a more and more detailed view of the interplanetary medium and its connection with the Sun. ...