SIMBAD references

2003ApJ...591.1064B - Astrophys. J., 591, 1064-1074 (2003/July-2)

A search for close binaries in the ρ Ophiuchi star-forming region.


Abstract (from CDS):

We have carried out a new, near-infrared speckle imaging survey of 19 members of the young stellar population in the nearby (d=140 pc) ρ Oph cloud core.
Result. for four binary and one newly discovered triple system are reported. Data for all known multiple systems among the pre-main-sequence population of ρ Oph are tabulated. We define a restricted binary fraction, Fb,r, and a restricted companion fraction, Fc,r, as counting only those systems most detectable in the present and previous high-resolution near-infrared imaging surveys having separations between 0".1 and ∼1".1 and K-band magnitude differences ΔK<3. Analysis of all the available multiplicity data results in updated values of Fb,r=24%±11% and Fc,r=24%±11% for the Ophiuchus pre-main-sequence population. These values are consistent with the values in the Taurus star-forming region, and Fc,ris in excess by a factor of 2 relative to the main sequence at the 1 σ level.

Abstract Copyright:

Journal keyword(s): Stars: Binaries: Close - Infrared: Stars - Stars: Pre-Main-Sequence - Techniques: High Anular Resolution

Simbad objects: 115

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