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STELLAR DIAMETERS AND TEMPERATURES. II. MAIN-SEQUENCE K- AND M-STARS
- T. Boyajian, K. von Braun, D. Berger
- Physics
- 12 August 2012
We present interferometric angular diameter measurements of 21 low-mass, K- and M-dwarfs made with the CHARA Array. This sample is enhanced by adding a collection of radius measurements published in…
STELLAR DIAMETERS AND TEMPERATURES. III. MAIN-SEQUENCE A, F, G, AND K STARS: ADDITIONAL HIGH-PRECISION MEASUREMENTS AND EMPIRICAL RELATIONS
- T. Boyajian, K. von Braun, N. Vargas
- Physics
- 12 June 2013
Based on CHARA Array measurements, we present the angular diameters of 23 nearby, main-sequence stars, ranging from spectral types A7 to K0, 5 of which are exoplanet host stars. We derive linear…
First Results from the CHARA Array. VII. Long-Baseline Interferometric Measurements of Vega Consistent with a Pole-On, Rapidly Rotating Star
- J. Aufdenberg, A. Mérand, N. Turner
- Physics
- 13 March 2006
We have obtained high-precision interferometric measurements of Vega with the CHARA Array and FLUOR beam combiner in the K′ band at projected baselines between 103 and 273 m. The measured visibility…
COLDER AND HOTTER: INTERFEROMETRIC IMAGING OF β CASSIOPEIAE AND α LEONIS
- X. Che, J. Monnier, L. Sturmann
- Physics
- 4 May 2011
Near-infrared interferometers have recently imaged a number of rapidly rotating A-type stars, finding levels of gravity darkening inconsistent with theoretical expectations. Here, we present new…
First Results from the CHARA Array. II. A Description of the Instrument
- T. T. ten Brummelaar, H. Mcalister, M. Shure
- Physics
- 4 April 2005
The CHARA Array is a six 1 m telescope optical/IR interferometric array located on Mount Wilson, California, designed and built by the Center for High Angular Resolution Astronomy of Georgia State…
Circumstellar material in the Vega inner system revealed by CHARA/FLUOR
- O. Absil, E. Folco, H. Mcalister
- Physics, Geology
- 12 April 2006
Context. Only a handful of debris disks have been imaged up to now. Due to the need for high dynamic range and high angular resolution, very little is known about the inner planetary region, where…
THE CHARA ARRAY ANGULAR DIAMETER OF HR 8799 FAVORS PLANETARY MASSES FOR ITS IMAGED COMPANIONS
- E. Baines, R. White, S. Ridgway
- Physics, Geology
- 1 October 2012
HR 8799 is an hF0 mA5 γ Doradus-, λ Bootis-, Vega-type star best known for hosting four directly imaged candidate planetary companions. Using the CHARA Array interferometer, we measure HR 8799's…
CHARA Array Measurements of the Angular Diameters of Exoplanet Host Stars
- E. Baines, H. Mcalister, S. Ridgway
- Physics, Geology
- 10 March 2008
We have measured the angular diameters for a sample of 24 exoplanet host stars using Georgia State University’s CHARA Array interferometer. We use these improved angular diameters together with…
Adaptive Optics Photometry and Astrometry of Binary Stars. II. A Multiplicity Survey of B Stars
- Lewis C. Roberts Jr., N. Turner, T. Brummelaar
- Physics
- 1 November 2005
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,…
55 CANCRI: STELLAR ASTROPHYSICAL PARAMETERS, A PLANET IN THE HABITABLE ZONE, AND IMPLICATIONS FOR THE RADIUS OF A TRANSITING SUPER-EARTH
- K. von Braun, S. B. Tabetha, P. J. Goldfinger
- Physics, Geology
- 6 June 2011
The bright star 55 Cancri is known to host five planets, including a transiting super-Earth. The study presented here yields directly determined values for 55 Cnc's stellar astrophysical parameters…
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