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Space Telescope Science Institute
Low-mass Companions to Nearby Stars

Low-mass Companions to Nearby Stars

Todd Henry
Space Telescope Science Institute
Baltimore MD

"Nearby Stars" will be discussed in the context of the sample of stellar neighbors within 10 parsecs of the Sun. The prevalence of companions found for all types of stars in the sample will be reviewed, with special attention to the low-mass secondaries. Observational techniques effective at detecting companions with separations of 0 to 1000 AU will be included. Characterization of the lowest mass objects known, specifically near the stellar/substellar break, will be discussed in detail. It will be pointed out just how far we have yet to go in order to detect directly any planet orbiting these stars.