The VAST Survey - III. The multiplicity of A-type stars within 75 pc

@article{Rosa2014TheVS,
  title={The VAST Survey - III. The multiplicity of A-type stars within 75 pc},
  author={Robert J. De Rosa and Jennifer L. Patience and Paul A. Wilson and Adam C. Schneider and Sloane J. Wiktorowicz and Arthur Vigan and Christian Marois and Inseok Song and Bruce A. Macintosh and James R. Graham and Ren{\'e} Doyon and Michael S. Bessell and S. Thomas and Olivier Lai},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2014},
  volume={437},
  pages={1216-1240}
}
With a combination of adaptive optics imaging and a multi-epoch common proper motion search, we have conducted a large volume-limited (D 6 75 pc) multiplicity survey of A- type stars, sensitive to companions beyond 30 au. The sample for the Volume- limited A- STar (VAST) survey consists of 435 A-type stars: 363 stars were observed with adaptive optics, 228 stars were searched for wide common proper motion companions and 156 stars were measured with both techniques. The projected separation… 
The M-dwarfs in Multiples (MinMs) survey – I. Stellar multiplicity among low-mass stars within 15 pc
We present a large-scale, volume-limited companion survey of 245 late-K to mid-M (K7-M6) dwarfs within 15 pc. Infrared adaptive optics (AO) data were analysed from the Very Large Telescope, Subaru
The VAST Survey - IV. A wide brown dwarf companion to the A3V star ζ Delphini
We report the discovery of a wide comoving substellar companion to the nearby (D = 67.5 ± 1.1 pc) A3V star ζ Delphini based on imaging and follow-up spectroscopic observations obtained during the
A pilot survey of the binarity of Massive Young Stellar Objects withK-band adaptive optics
We present the first search for binary companions of Massive Young Stellar Objects (MYSOs) using AO-assisted $K$ band observations, with NaCo at the VLT. We have surveyed 32 MYSOs from the RMS
Companions and Environments of Low-Mass Stars: From Star-Forming Regions to the Field
The lowest-mass stars, known as M-dwarfs, form target samples for upcoming exoplanet searches, and together with lower-mass substellar objects known as brown dwarfs, are among prime targets for
Detection of a Low-mass Stellar Companion to the Accelerating A2IV Star HR 1645
The ∼500 Myr A2IV star HR 1645 has one of the most significant low-amplitude accelerations of nearby early-type stars measured from a comparison of the Hipparcos and Gaia astrometric catalogs. This
The International Deep Planet Survey: II. The frequency of directly imaged giant exoplanets with stellar mass
Radial velocity and transit methods are effective for the study of short orbital period exoplanets but they hardly probe objects at large separations for which direct imaging can be used. We carried
SPOTS: The Search for Planets Orbiting Two Stars
Binary stars constitute a large percentage of the stellar population, yet relatively little is known about the planetary systems orbiting them. Most constraints on circumbinary planets (CBPs) so far
Searching for faint companions with VLTI/PIONIER - II. 92 main sequence stars from the Exozodi survey
Context. The Exozodi survey aims to determine the occurrence rate of bright exozodiacal discs around nearby main sequence stars using infrared interferometry. Although the Exozodi survey targets have
The Ages of A-Stars I: Interferometric Observations and Age Estimates for Stars in the Ursa Major Moving Group
We have observed and spatially resolved a set of seven A-type stars in the nearby Ursa Major moving group with the Classic, CLIMB, and PAVO beam combiners on the Center for High Angular Resolution
Searching for gas giant planets on Solar system scales – a NACO/APP L′-band survey of A- and F-type main-sequence stars
We report the results of a direct imaging survey of A- and F-type main sequence stars searching for giant planets. A/F stars are often the targets of surveys, as they are thought to have more massive
...
...

References

SHOWING 1-10 OF 177 REFERENCES
The Volume-limited A-Star (VAST) survey – I. Companions and the unexpected X-ray detection of B6–A7 stars
With an adaptive optics imaging survey of 148 B6―A7 stars, we have tested the hypothesis that unresolved lower mass companions are the source of the unexpected X-ray detections of stars in this
The VAST Survey - II. Orbital motion monitoring of A-type star multiples
As a part of our ongoing Volume-limited A-Star (VAST) adaptive optics survey, we have obtained observations of 26 binary systems with projected separations <100 AU, 13 of which have sufficient
A SURVEY OF STELLAR FAMILIES: MULTIPLICITY OF SOLAR-TYPE STARS
We present the results of a comprehensive assessment of companions to solar-type stars. A sample of 454 stars, including the Sun, was selected from the Hipparcos catalog with π>40 mas, σπ/π < 0.05,
THE HIGH ANGULAR RESOLUTION MULTIPLICITY OF MASSIVE STARS
We present the results of a speckle interferometric survey of Galactic massive stars that complements and expands upon a similar survey made over a decade ago. The speckle observations were made with
Binary Stars in the Orion Nebula Cluster
Abstract We report on a high-spatial-resolution survey for binary stars in the periphery of the Orion Nebula Cluster, at 5–15 arcmin (0.65 – 2 pc) from the cluster center. We observed 228 stars with
Adaptive Optics Photometry and Astrometry of Binary Stars. II. A Multiplicity Survey of B Stars
We carried out a search for companions to B stars using the adaptive optics system of the Advanced Electro-Optical System 3.6 m telescope. We observed 70 B stars in the I band, finding 16 companions,
The International Deep Planet Survey - I. The frequency of wide-orbit massive planets around A-stars
Breakthrough direct detections of planetary companions orbiting A-type stars confirm the existence of massive planets at relatively large separations, but dedicated surveys are required to estimate
THE ASTRALUX LARGE M-DWARF MULTIPLICITY SURVEY
We present the results of an extensive high-resolution imaging survey of M-dwarf multiplicity using the Lucky Imaging technique. The survey made use of the AstraLux Norte camera at the Calar Alto 2.2
Double stars with wide separations in the AGK3 - I. Components that are themselves spectroscopic binaries
Wide binaries are tracers of the gravity field of the Galaxy, but their study requires some caution. A large list of common proper motion stars selected from the third Astronomischen Gesellschaft
New Distant Companions to Known Nearby Stars. II. Faint Companions of Hipparcos Stars and the Frequency of Wide Binary Systems
We perform a search for faint, common proper motion companions of Hipparcos stars using the recently published Lépine-Shara Proper Motion-North catalog of stars with proper motion μ > 0.15″ yr-1. Our
...
...