Computer Science
Scientific paper
Feb 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aipc.1094..848n&link_type=abstract
COOL STARS, STELLAR SYSTEMS AND THE SUN: Proceedings of the 15th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun.
Computer Science
Binary And Multiple Stars, Star Formation, Photometric, Polarimetric, And Spectroscopic Instrumentation
Scientific paper
A large fraction of stars are members of binary systems. Yet, the formation and early evolution of binary and multiple stars is not well understood theoretically and poorly constrained observationally. We present findings from a comprehensive spectroscopic survey for close binaries among nearly 200 members of the Chamaeleon I and Taurus-Auriga star-forming regions. We find that higher mass stars in our sample have a higher spectroscopic binary frequency than their lower mass counterparts, similar to what is seen in the field and for resolved (wide) binaries in young associations. More intriguingly, our observations also reveal a significantly larger fraction of tight binaries in Tau-Aur compared to Cha I, both for F-K stars and for M dwarfs, implying possible regional variations in the formation of multiple stars.
Brandeker Alexis
Jayawardhana Ray
Nguyen Duy Cuong
Scholz Alexander
van Kerkwijk Marten Henric
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