Sub-systems with low-mass companions in nearby multiple stars

Details Sub-systems with low-mass companions in nearby multiple stars Sub-systems with low-mass companions in nearby multiple stars

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009noao.prop..111t&link_type=abstract

NOAO Proposal ID #2009B-0111

Computer Science

Scientific paper

Stellar multiplicity has direct implications for circum-stellar disks and planet formation. The knowledge of multiplicity higher than two is very poor even for nearby solar-type dwarfs stars, partly because sub-systems with long (>30y) periods and low-mass companions escape detection. A short dedicated survey of wide nearby binaries is proposed to determine the real fraction of such sub-systems and the distribution of their mass ratios. Imaging with NICI detects companions with mass ratios 0.1 or lower, with a well-established threshold, and thus enables a complete survey of the parameter space for sub-systems. This program complements radial-velocity and common-proper-motion surveys.

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