SIMBAD references

1997A&A...325..159L - Astronomy and Astrophysics, volume 325, 159-166 (1997/9-1)

A search for companions to nearby southern M dwarfs with near-infrared speckle interferometry.


Abstract (from CDS):

We searched the 9 M-dwarf primaries nearer than 5pc and south of declination δ=-30o for companions with separations 1-10AU and found none. Taken together with the 25 northern primaries studied by Henry and McCarthy (1990ApJ...350..334H) the fraction of binaries and triples within the now complete sample of all M dwarfs within 5pc is 9/34=26±9%, and the average number of companions per system is 0.32±0.10. This is lower by 2σ than the observed multiplicity fraction of 43±5%, and companions per system of 0.49±0.05 in the sample of nearby solar-type main sequence stars. It is also much lower than the extrapolated binary fraction among young stars in Taurus. We discuss the implications of this finding.

Abstract Copyright:

Journal keyword(s): binaries: general - stars: low-mass - stars: luminosity function, mass function

VizieR on-line data: <Available at CDS (J/A+A/325/159): table1 table2 table3 tables.tex>

Simbad objects: 42

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