SIMBAD references

2012AJ....144..102T - Astron. J., 144, 102 (2012/October-0)

Wide companions to Hipparcos stars within 67 pc of the Sun.


Abstract (from CDS):

A catalog of common-proper-motion (CPM) companions to stars within 67 pc of the Sun is constructed based on the SUPERBLINK proper-motion survey. It contains 1392 CPM pairs with angular separations 30'' < ρ < 1800'', relative proper motion between the two components less than 25 mas/yr, and magnitudes and colors of the secondaries consistent with those of dwarfs in the (MV , V - J) diagram. In addition, we list 21 candidate white dwarf CPM companions with separations under 300'', about half of which should be physical. We estimate a 0.31 fraction of pairs with red dwarf companions to be physical systems (about 425 objects), while the rest (mostly wide pairs) are chance alignments. For each candidate companion, the probability of a physical association is evaluated. The distribution of projected separations s of the physical pairs between 2 kAU and 64 kAU follows f(s)∝s–1.5, which decreases faster than Öpik's law. We find that solar-mass dwarfs have no less than 4.4%±0.3% companions with separations larger than 2 kAU, or 3.8%±0.3% per decade of orbital separation in the 2-16 kAU range. The distribution of mass ratio of those wide companions is approximately uniform in the 0.1 < q < 1.0 range, although we observe a dip at q ≃ 0.5 which, if confirmed, could be evidence of bimodal distribution of companion masses. New physical CPM companions to two exoplanet host stars are discovered.

Abstract Copyright:

Journal keyword(s): binaries: general

VizieR on-line data: <Available at CDS (J/AJ/144/102): table1.dat>

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 31

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2012AJ....144..102T and select 'bookmark this link' or equivalent in the popup menu


© Université de Strasbourg/CNRS

    • Contact