Journal ArticleDOI
Binary stars unresolved by speckle interferometry.
TLDR
The epochs of 372 speckle observations obtained with the 4m Mayall telescope at KPNO during 1975-77 are given for 156 unresolved visual, astrometric, spectrum, occultation, and spectroscopic binary stars as discussed by the authors.Abstract:
The epochs of 372 speckle observations obtained with the 4-m Mayall telescope at KPNO during 1975-77 are given for 156 unresolved visual, astrometric, spectrum, occultation, and spectroscopic binary stars. Specified thresholds are set for detectible angular separations and magnitude differences so that the negative observations presented here can be used to place constraints on orbital parameters.read more
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Journal ArticleDOI
A survey of stellar families: multiplicity of solar-type stars
Deepak Raghavan,Harold A. McAlister,Todd J. Henry,David W. Latham,Geoffrey W. Marcy,Brian D. Mason,Douglas R. Gies,Russel White,T. ten Brummelaar +8 more
TL;DR: In this article, the authors present the results of a comprehensive assessment of companions to solar-type stars, including the Sun, from the Hipparcos catalog with {pi}>40 mas, {sigma}{sub {pi/{pi}} < 0.05, 0.5 {<=} B - V {< =} 1.0 ({approx}F6-K3), and constrained by absolute magnitude and color to exclude evolved stars.
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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
Beyond the Kepler/K2 bright limit: Variability in the seven brightest members of the Pleiades
Timothy R. White,Timothy R. White,Timothy R. White,Benjamin J. S. Pope,Victoria Antoci,Péter Pápics,Conny Aerts,Conny Aerts,D. R. Gies,Kathryn Gordon,Daniel Huber,Gail Schaefer,Suzanne Aigrain,Simon Albrecht,Thomas Barclay,Geert Barentsen,Paul G. Beck,Timothy R. Bedding,Timothy R. Bedding,M. Fredslund Andersen,Frank Grundahl,Steve B. Howell,Michael J. Ireland,Simon J. Murphy,Simon J. Murphy,Martin Bo Nielsen,Martin Bo Nielsen,V. Silva Aguirre,Peter G. Tuthill +28 more
TL;DR: In this paper, a new photometric technique, called Halo photometry, was developed to observe very bright stars using a limited number of pixels, which is simple, fast and does not require extensive pixel allocation, and will allow us to use K2 and other photometric missions, such as TESS, to observe the stars for asteroseismology and search for transiting exoplanets.
Journal ArticleDOI
Ccd speckle observations of binary stars with the wiyn telescope. vi. measures during 2007-2008*
Elliott P. Horch,Elliott P. Horch,Elliott P. Horch,Lizzie Anne P. Bahi,Joseph R. Gaulin,Joseph R. Gaulin,Steve B. Howell,William Sherry,Roberto Baena Gallé,William F. van Altena +9 more
TL;DR: In this article, five hundred thirty-one speckle measures of binary stars are reported, taken mainly during the period 2008 June through 2009 October at the WIYN 3.5 m Telescope at Kitt Peak.
Journal ArticleDOI
Multiplicity of Galactic Cepheids from long-baseline interferometry I. CHARA/MIRC detection of the companion of V1334 Cygni
Alexandre Gallenne,John D. Monnier,Antoine Mérand,Pierre Kervella,Stefan Kraus,Gail H. Schaefer,Wolfgang Gieren,Grzegorz Pietrzyński,Grzegorz Pietrzyński,Laszlo Szabados,Xiao Che,Fabien Baron,Ettore Pedretti,Harold A. McAlister,T. ten Brummelaar,Judit Sturmann,Laszlo Sturmann,Nils H. Turner,Chris Farrington,Norm Vargas +19 more
TL;DR: In this article, a Cepheid companion was detected using long-baseline interferometry at visible and infrared wavelengths, and the fundamental parameters of these systems were derived based on the resulting visual orbit and radial velocities, particularly the masses of the components and the geometric distance.