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Planets Beyond the Solar System and the Next Generation of Space Missions


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Target Selection for Planet Searches

David Soderblom
Space Telescope Science Institute
Baltimore MD

Planets may, in principle, exist around any type of star, but some stars are better than others as places to look just because they are amenable to our techniques. Stars substantially more massive than the Sun tend to have broad lines, for example, precluding radial velocity searches. They also tend to exhibit intrinsic variability. Stars much less massive than the Sun are very faint, limiting the attainable signal-to-noise for even the nearest examples.

Our curiosity is naturally drawn to the solar-type stars (G dwarfs, roughly) since we live around one ourselves, and they are also - perhaps not coincidentally - a preferred sample when looking for planets beyond the solar system. This is because G dwarfs, especially old ones like the Sun, are:


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Dave Soderblom, soderblom@stsci.edu
Copyright © 1996, Association of Universities for Research in Astronomy. All rights reserved.

Last update: 10/22/96 11:00:29