SIMBAD references

2007ApJ...667..520C - Astrophys. J., 667, 520-526 (2007/September-3)

Southern very low mass stars and brown dwarfs in wide binary and multiple systems.


Abstract (from CDS):

The results of the Königstuhl survey in the Southern Hemisphere are presented. I have searched for common proper motion companions to 173 field very low mass stars and brown dwarfs with spectral types >M5.0 V and magnitudes J≲14.5 mag. I have measured for the first time the common proper motion of two new wide systems containing very low mass components, Königstuhl 2 AB and 3 A-BC. Together with Königstuhl 1 AB and 2M 0126-50 AB, they are among the widest systems in their respective classes (r=450-11,900 AU). I have determined the minimum frequency of field wide multiples (r>100 AU) with late-type components at 5.0%±1.8% and the frequency of field wide late-type binaries with mass ratios q>0.5 at 1.2%±0.9%. These values represent a key diagnostic of evolution history and low-mass star and brown dwarf formation scenarios. In addition, the proper motions of 62 field very low mass dwarfs are measured here for the first time.

Abstract Copyright:

Journal keyword(s): Stars: Binaries: Visual - Stars: Formation - stars: individual (2MASS J23310161-0406193 AB) - stars: individual (HD 221356) - stars: individual (LP 655-23) - Stars: Low-Mass, Brown Dwarfs

VizieR on-line data: <Available at CDS (J/ApJ/667/520): table3.dat>

Nomenclature: Table 1, Figs 2,3: Koenigstuhl NA (Nos 2, 2A, 2B, 3, 3A, 3B, 3C) added.

Simbad objects: 211

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