Other
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...20518005k&link_type=abstract
American Astronomical Society Meeting 205, #180.05; Bulletin of the American Astronomical Society, Vol. 37, p.384
Other
1
Scientific paper
We describe the key scientific drivers for the Stellar Imager (SI) Vision Mission - a UV-optical 0.1 milli-arcsecond (mas) imaging space interferometer. Ultra-high sub-mas angular resolution imaging at UV and optical wavelengths is key to studies of magnetic field structures that govern the formation of stars and planetary systems, the habitability of planets, long-term space weather in the Exploration era, and transport processes on many scales in the Universe. Magnetic fields affect the evolution of structure in the Universe and drive solar and stellar activity which is a key to life's origin and survival. However, our understanding of how magnetic fields form, operate, and evolve is currently very limited, even for the nearest star, our Sun.
The key science goal of the Stellar Imager Mission is to obtain an understanding of stellar dynamos, and in particular the solar dynamo, through a population study of other stars representing a broad range of stellar parameters and activity. The end goal is to understand the variable impact of stellar magnetic activity on planetary climates and the origin and maintenance of life. Improved knowledge of solar-type dynamo activity and the interaction of global fields and flows is also crucial for developing models for long-term space weather forcasting. Furthermore, SI's high-angular resolution capabilities, over two magnitudes better then the HST, will enable unprecedented studies of dynamo and accretion-driven processes, and mass exchange and mass flows in a wide variety of galactic and extragalactic sources, including young star/disk systems, solar-type and evolved stars and astrospheres, numerous interacting binaries, and SN, AGN, and black hole environments.
Carpenter Kenneth G.
Karovska Magarita
Schrijver Carolus J.
SI Mission Concept Development
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