Speckle interferometry at soar in 2014
TLDR
The results of speckle interferometric observations at the Southern Astrophysical Research Telescope (SOAR) telescope in 2014 are given in this article, where the calibration of the data is checked by linear fits to the positions of 41 wide binaries observed at SOAR over several seasons.Abstract:
The results of speckle interferometric observations at the Southern Astrophysical Research Telescope (SOAR) telescope in 2014 are given. A total of 1641 observations were taken, yielding 1636 measurements of 1218 resolved binary and multiple stars and 577 non-resolutions of 441 targets. We resolved for the first time 56 pairs, including some nearby astrometric or spectroscopic binaries and ten new subsystems in previously known visual binaries. The calibration of the data is checked by linear fits to the positions of 41 wide binaries observed at SOAR over several seasons. The typical calibration accuracy is 01 in angle and 0.3% in pixel scale, while the measurement errors are on the order of 3 mas. The new data are used here to compute 194 binary star orbits, 148 of which are improvements on previous orbital solutions and 46 are first-time orbits.read more
Citations
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Journal ArticleDOI
How to Constrain Your M Dwarf. II. The Mass-Luminosity-Metallicity Relation from 0.075 to 0.70 Solar Masses
Journal ArticleDOI
How to Constrain Your M dwarf II: the mass-luminosity-metallicity relation from 0.075 to 0.70$M_\odot$
Andrew W. Mann,Trent J. Dupuy,Adam L. Kraus,Eric Gaidos,Megan Ansdell,Michael J. Ireland,Aaron C. Rizzuto,Chao-Ling Hung,Jason A. Dittmann,Samuel Factor,Gregory A. Feiden,Raquel A. Martinez,Dary Ruíz-Rodríguez,Pa Chia Thao +13 more
TL;DR: The mass-luminosity relation for late-type stars has long been a critical tool for estimating stellar masses as mentioned in this paper, and there is a growing need for both a higher-precision relation and a better understanding of systematic effects (e.g., metallicity).
Journal ArticleDOI
CARMENES input catalogue of M dwarfs - II. High-resolution imaging with FastCam
M. Cortés-Contreras,Víctor J. S. Béjar,Jose A. Caballero,Jose A. Caballero,B. Gauza,D. Montes,F. J. Alonso-Floriano,Sandra V. Jeffers,Juan Carlos Morales,Ansgar Reiners,Ignasi Ribas,P. Schöfer,Andreas Quirrenbach,Pedro J. Amado,Reinhard Mundt,Walter Seifert +15 more
TL;DR: In this paper, the authors search for low-mass companions of M dwarfs and characterize their multiplicity fraction with the purpose of helping in the selection of the most appropriate targets for the CARMENES exoplanet survey.
Journal ArticleDOI
Ten Years of Speckle Interferometry at SOAR
TL;DR: In this paper, the HRCam instrument, observing strategy and planning, data processing and calibration methods, developed and improved during ten years, are presented in a concise way, and an overview of the main results delivered by this instrument is given.
Journal ArticleDOI
Observations of Binary Stars with the Differential Speckle Survey Instrument. VII. Measures from 2010 September to 2012 February at the WIYN Telescope
Elliott P. Horch,Dana I. Casetti-Dinescu,Matthew A. Camarata,Akbar Bidarian,William F. van Altena,William Sherry,Mark E. Everett,Steve B. Howell,David R. Ciardi,Todd J. Henry,Daniel A. Nusdeo,Jennifer G. Winters +11 more
TL;DR: In this article, the authors report on speckle observations of binary stars carried out at the WIYN Telescope over the period from 2010 September through 2012 February, providing relative astrometry for 2521 observations of 883 objects, 856 of which are double stars and 27 of which were triples.
References
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Journal ArticleDOI
Validation of the new Hipparcos reduction
TL;DR: In this article, a new reduction of the Hipparcos data was published, which claimed accuracies for nearly all stars brighter than magnitude Hp = 8 to be better, by up to a factor 4, than in the original catalog.
Journal ArticleDOI
The Geneva-Copenhagen survey of the Solar neighbourhood - Ages, metallicities, and kinematic properties of ~14 000 F and G dwarfs
Birgitta Nordström,Birgitta Nordström,Michel Mayor,Johannes Andersen,J. Holmberg,Frederic Pont,Bjarne Rosenkilde Jørgensen,E. H. Olsen,Stéphane Udry,N. Mowlavi +9 more
TL;DR: In this article, the authors presented and discussed new determinations of metallicity, rotation, age, kinematics, and Galactic orbits for a com- plete, magnitude-limited, and kinematically unbiased sample of 16 682 nearby F and G dwarf stars.
Journal ArticleDOI
The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog
TL;DR: The Washington Double Star Catalog (WDS) as mentioned in this paper contains positions, discoverer designations, epochs, position angles, separations, magnitudes, spectral types, proper motions, and, when available, Durchmusterung numbers and notes for the components of 84,486 systems based on 563,326 means.
Journal ArticleDOI
Southern massive stars at high angular resolution: observational campaign and companion detection
Hugues Sana,J.-B. Le Bouquin,J.-B. Le Bouquin,Sylvestre Lacour,Jean-Philippe Berger,Gilles Duvert,Gilles Duvert,L. Gauchet,Barnaby Norris,Johan Olofsson,D. Pickel,G. Zins,G. Zins,Olivier Absil,A. de Koter,A. de Koter,Kaitlin M. Kratter,Kaitlin M. Kratter,O. Schnurr,Hans Zinnecker +19 more
TL;DR: The Southern MAssive Stars at High angular resolution survey (smash+) was designed to fill this gap by providing the first systematic interferometric survey of Galactic massive stars as mentioned in this paper.
Journal ArticleDOI
A spectroscopic survey on the multiplicity of high-mass stars
TL;DR: In this article, the authors performed a vast high-resolution radial velocity spectroscopic survey of about 250 O- and 540 B-type stars in the southern Milky Way which indicates that the majority of stars (>82 %) with masses above 16 % form close binary systems while this fraction rapidly drops to 20 % for stars of 3 %.