Imaging survey of subsystems in secondary components to nearby southern dwarfs
arXiv:1407.6045 · doi:10.1088/0004-6256/148/4/72
Abstract
To improve the statistics of hierarchical multiplicity, secondary components of wide nearby binaries with solar-type primaries were surveyed at the SOAR telescope for evaluating the frequency of subsystems. Images of 17 faint secondaries were obtained with the SOAR Adaptive Module that improved the seeing; one new 0.2" binary was detected. For all targets, photometry in the g', i', z' bands is given. Another 46 secondaries were observed by speckle interferometry, resolving 7 close subsystems. Adding literature data, the binarity of 95 secondary components is evaluated. We found that the detection-corrected frequency of secondary subsystems with periods in the well-surveyed range from 10^3 to 10^5 days is 0.21+-0.06, same as the normal frequency of such binaries among solar-type stars, 0.18. This indicates that wide binaries are unlikely to be produced by dynamical evolution of N-body systems, but are rather formed by fragmentation.
arXiv commentAccepted by the Astronomical Journal; 7 pages, 7 figures
References in corpus (20)
- The Geneva-Copenhagen survey of the Solar neighbourhood: Ages, metallicities, and kinematic properties of 14,000 F and G dwarfs
- The Ninth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-III Baryon Oscillation Spectroscopic Survey
- Tertiary companions to close spectroscopic binaries
- Stellar SEDs from 0.3-2.5 Microns: Tracing the Stellar Locus and Searching for Color Outliers in SDSS and 2MASS
- Speckle interferometry at the Blanco and SOAR telescopes in 2008 and 2009
- From binaries to multiples II: hierarchical multiplicity of F and G dwarfs
- Detection of Nine M8.0-L0.5 Binaries: The Very Low Mass Binary Population and its Implications for Brown Dwarf and VLM Star Formation
- Wide companions to Hipparcos stars within 67 pc of the Sun
- The Palomar/Keck Adaptive Optics Survey of Young Solar Analogs: Evidence for a Universal Companion Mass Function
- Search for brown-dwarf companions of stars
- From binaries to multiples I: Data on F and G dwarfs within 67 pc of the Sun
- Formation of the Widest Binaries from Dynamical Unfolding of Triple Systems
- VLT/NACO Deep imaging survey of young, nearby austral stars
- Multiplicity Amongst Wide Brown Dwarf Companions to Nearby Stars: Gliese 337CD
- Cluster membership probabilities from proper motions and multiwavelength photometric catalogues: I. Method and application to the Pleiades cluster
- The multiplicity of exoplanet host stars - New low-mass stellar companions of the exoplanet host stars HD125612 and HD212301
- Sub-systems in nearby solar-type wide binaries
- Follow-up observations of binary ultra-cool dwarfs
- Millions of Multiples: Detecting and Characterizing Close-Separation Binary Systems in Synoptic Sky Surveys
- Discovery of close companions to the nearby young stars HD 199143 and HD 358623
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