SIMBAD references

2005A&A...437..611R - Astronomy and Astrophysics, volume 437, 611-626 (2005/7-2)

A multiplicity survey of the ρ Ophiuchi molecular clouds.

RATZKA T., KOEHLER R. and LEINERT C.

Abstract (from CDS):

We present a volume-limited multiplicity survey with magnitude cutoff (mK≤10.5mag) of 158 young stellar objects located within or in the vicinity of the ρ Ophiuchi Dark Cloud. With exception of eleven already well observed objects, all sources have been observed by us in the K-band with 3.5m telescopes by using speckle techniques. The separation range covered by our survey is 0.13''≤θ≤6.4'', where the lower limit is given by the diffraction limit of the telescopes and the upper limit by confusion with background stars. The multiplicity survey is complete for flux ratios ≥0.1 (ΔmK≤2.5) at the diffraction limit. After taking the background density into account the degree of multiplicity is 29.1%±4.3% and thus only marginally higher than the value 23.5%±4.8% derived for the given separation range for the main-sequence solar-like stars in the solar neighbourhood (Duquennoy & Mayor, 1991A&A...248..485D). We discuss the implications of these findings.

Abstract Copyright:

Journal keyword(s): stars: pre-main-sequence - binaries: visual - infrared: stars - surveys - techniques: interferometric

Simbad objects: 217

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2020.01.24-00:13:21

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