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| Paper: |
Stellar Planet Survey-STEPS |
| Volume: |
294, Scientific Frontiers in Research on Extrasolar Planets |
| Page: |
107 |
| Authors: |
Pravdo, S. H.; Shaklan, S. B. |
| Abstract: |
The Stellar Planet Survey (STEPS) is an astrometric search for planets around nearby stars. The advantages of astrometry are (1) the technique is more sensitive to detecting planets with larger planet-to-star separations, i.e. stellar systems similar to ours; and (2) the planet-to-star mass ratios are measured directly, independent of the system inclination angles. Since, in contrast, radial velocity searches are more sensitive to systems with smaller separations, the majority of known planets are close to their stars: only 25% of planets known today have orbits beyond 1.5 AU, and none are as distant as Jupiter. Our search for solar-like systems now has a temporal baseline of about 4 years, and has yielded preliminary evidence for low-mass companions to some of our targets. |
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