Journal ArticleDOI
Speckle Interferometry of New and Problem Hipparcos Binaries
Brian D. Mason,Christian Martin,Christian Martin,William I. Hartkopf,Donald J. Barry,Marvin E. Germain,Marvin E. Germain,Geoffrey G. Douglass,Charles E. Worley,Gary L. Wycoff,Theo ten Brummelaar,Theo ten Brummelaar,Otto G. Franz +12 more
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TLDR
The ESA Hipparcos satellite made measurements of over 12,000 double stars and discovered 3406 new systems as discussed by the authors, including a total of 11,687 "problem stars" that did not provide the classical parameters of separation and position angle (ρ, θ) but were the so-called problem stars, flagged "G, "O, "V, or "X" (field H59 of the main catalog).Abstract:
The ESA Hipparcos satellite made measurements of over 12,000 double stars and discovered 3406 new systems. In addition to these, 4706 entries in the Hipparcos Catalogue correspond to double star solutions that did not provide the classical parameters of separation and position angle (ρ, θ) but were the so-called problem stars, flagged "G," "O," "V," or "X" (field H59 of the main catalog). An additional subset of 6981 entries were treated as single objects but classified by Hipparcos as "suspected nonsingle" (flag "S" in field H61), thus yielding a total of 11,687 "problem stars." Of the many ground-based techniques for the study of double stars, probably the one with the greatest potential for exploration of these new and problem Hipparcos binaries is speckle interferometry. Results are presented from an inspection of 848 new and problem Hipparcos binaries, using both archival and new speckle observations obtained with the USNO and CHARA speckle cameras.read more
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Journal ArticleDOI
Contact Binaries with Additional Components. I. The Extant Data
TL;DR: In this article, the presence of distant companions that may have acquired and/or absorbed angular momentum during the evolution of multiple systems, thus facilitating or enabling the formation of contact binaries was established.
Journal ArticleDOI
Feedback and the fundamental line of low-luminosity low-surface-brightness/dwarf galaxies
TL;DR: In this paper, the role of feedback in establishing the scaling relations of low-surface-brightness (LSB) and dwarf galaxies with stellar masses in the range 6 × 10 5 ≤ M * ≤ 3 × 10 1 0 M O .
Journal ArticleDOI
Two Suns in The Sky: Stellar Multiplicity in Exoplanet Systems
Deepak Raghavan,Todd J. Henry,Brian D. Mason,John P. Subasavage,Wei-Chun Jao,Thom Beaulieu,Nigel Hambly +6 more
TL;DR: In this paper, the authors present results of a reconnaissance for stellar companions to all 131 radial velocity-detected candidate extrasolar planetary systems known as of 2005 July 1, and confirm that a lower limit of 30 (23%) of the 131 exoplanet systems have stellar companions.
Journal ArticleDOI
The VAST Survey - III. The multiplicity of A-type stars within 75 pc
R. J. De Rosa,R. J. De Rosa,Jennifer Patience,Jennifer Patience,Paul Wilson,Adam C. Schneider,Sloane J. Wiktorowicz,Sloane J. Wiktorowicz,Arthur Vigan,Arthur Vigan,Christian Marois,Inseok Song,Bruce Macintosh,James R. Graham,James R. Graham,René Doyon,Michael S. Bessell,Sandrine Thomas,Olivier Lai +18 more
TL;DR: In this paper, a volume-limited (D 6 75 pc) multiplicity survey of A-type stars was conducted with a combination of adaptive optics imaging and a multi-epoch common proper motion search.
Journal ArticleDOI
IMAGING AND MODELING RAPIDLY ROTATING STARS: α CEPHEI AND α OPHIUCHI
Ming Zhao,John D. Monnier,Ettore Pedretti,Nathalie Thureau,Antoine Mérand,Antoine Mérand,T. ten Brummelaar,Harold A. McAlister,S. T. Ridgway,Nils H. Turner,Judit Sturmann,Laszlo Sturmann,P. J. Goldfinger,Chris Farrington +13 more
TL;DR: In this article, the authors used the CHARA array to image and model two nearby rapid rotators α Cephei and α Ophiuchi, obtained with the largest optical/IR interferometer in the world.
References
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Journal ArticleDOI
ICCD Speckle Observations of Binary Stars. XIX. An Astrometric/Spectroscopic Survey of O Stars
Brian D. Mason,Douglas R. Gies,William I. Hartkopf,William G. Bagnuolo,T. ten Brummelaar,T. ten Brummelaar,T. ten Brummelaar,Harold A. McAlister +7 more
TL;DR: In this paper, the authors present the results of a speckle interferometric survey made with the CHARA camera and 4 m-class telescopes of Galactic O-type stars with V 59% have a visual or spectroscopic companion, but less so among field and especially runaway stars.
Journal ArticleDOI
The Washington Double Star Catalog (WDS, 1996.0)
C. E. Worley,G. G. Douglass +1 more
TL;DR: A major revision of the Washington Double Star (WDS) catalog containing data for the com- ponents of 78 100 systems is now available from the data centers and via the World Wide Web (http://aries.usno.navy.mil/ad/wds/).
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Binary Star Orbits from Speckle Interferometry. II. Combined Visual/Speckle Orbits of 28 Close Systems
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Binary Star Orbits From Speckle Interferometry. VIII. Orbits of 37 Close Visual System
Journal ArticleDOI
ICCD Speckle Observations of Binary Stars. X. A Further Survey for Duplicity Among the Bright Stars
TL;DR: In this paper, interferometric observations from the Canada-France-Hawaii 3.6 m and Cerro Tololo 4 m telescopes are reported for 1123 stars selected from the Yale Bright Star Catalogue in a continuing effort to detect new binaries among the bright stars.