SIMBAD references

2015MNRAS.449.2618W - Mon. Not. R. Astron. Soc., 449, 2618-2637 (2015/May-3)

The M-dwarfs in Multiples (MinMs) survey - I. Stellar multiplicity among low-mass stars within 15 pc.

WARD-DUONG K., PATIENCE J., DE ROSA R.J., BULGER J., RAJAN A., GOODWIN S.P., PARKER R.J., McCARTHY D.W. and KULESA C.

Abstract (from CDS):

We present a large-scale, volume-limited companion survey of 245 late-K to mid-M (K7-M6) dwarfs within 15 pc. Infrared adaptive optics (AO) data were analysed from the Very Large Telescope, Subaru Telescope, Canada-France-Hawaii Telescope, and MMT Observatory to detect close companions to the sample from ∼ 1 to 100 au, while digitized wide-field archival plates were searched for wide companions from ∼ 100 to 10 000 au. With sensitivity to the bottom of the main sequence over a separation range of 3 to 10 000 au, multiple AO and wide-field epochs allow us to confirm candidates with common proper motions, minimize background contamination, and enable a measurement of comprehensive binary statistics. We detected 65 comoving stellar companions and find a companion star fraction of 23.5±3.2 percent over the 3 au to 10 000 au separation range. The companion separation distribution is observed to rise to a higher frequency at smaller separations, peaking at closer separations than measured for more massive primaries. The mass ratio distribution across the q = 0.2-1.0 range is flat, similar to that of multiple systems with solar-type primaries. The characterization of binary and multiple star frequency for low-mass field stars can provide crucial comparisons with star-forming environments and hold implications for the frequency and evolutionary histories of their associated discs and planets.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): techniques: high angular resolution - binaries: close - binaries: general - binaries: visual - stars: late-type - stars: low-mass

VizieR on-line data: <Available at CDS (J/MNRAS/449/2618): table1.dat table2.dat table4.dat tablea1.dat>

Simbad objects: 248

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2019.12.06-15:07:31

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