Unravelling Long-Term Solar Variability: The Stars As Suns Project

Details Unravelling Long-Term Solar Variability: The Stars As Suns Project Unravelling Long-Term Solar Variability: The Stars As Suns Project

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd...8e..13n&link_type=abstract

Solar and Stellar Activity Cycles, 26th meeting of the IAU, Joint Discussion 8, 17-18 August 2006, Prague, Czech Republic, JD08,

Physics

Scientific paper

It is well known that solar variability influences the near-Earth Space environment at short timescales of days - an effect collectively termed as Space Weather. A lesser known and more subtle influence of solar variability at longer timescales, is however, just beginning to be appreciated. This long-term solar forcing, which is sometimes referred to as Space Climate, has important consequences for the formation and evolution of planetary atmospheres, evolution of life and global climate on Earth. Understanding the Sun's variability and its heliospheric influence at such scales stretching from millennia to stellar evolutionary timescales is therefore of fundamental importance. However, our understanding of this variability, which is partly due to the evolution of the solar magnetic dynamo, is limited by solar observations which exist only from early 17^th Century onwards. In this talk I will review the "Stars as Suns" project - in which we take a novel approach to unravelling long-term solar variability through theoretical modelling and magnetic activity observations of Sun-like stars, which are at various evolutionary phases relative to the Sun. The "Stars as Suns" project is funded by the NASA Living With a Star program through grant NNG05GE47G.

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