252 citations · 624 across the 17 of their papers we have counts for
17 papers
CHARA Array Observations of the Evolved Components in Symbiotic Star Systems
Thomas Martin Gaudin, Ryan Norris, Magdalena Otulakowska-Hypka +30
The nature of the mechanisms that drive mass transfer in symbiotic stars remains an area of active research in stellar astronomy. Constraining the role that both stellar winds and…
Pre-nova Observations of T CrB: A view from the CHARA Array
Ryan Norris, Narsireddy Anugu, Thomas Gaudin +38
T CrB is a symbiotic recurrent nova consisting of a red giant and white dwarf with recent eruptions in 1866 and 1946 and an anticipated eruption in the mid 2020s. We report CHARA A…
CHARA Array Delay Lines: Upgrades, Performance and Future Directions
Narsireddy Anugu, Nils H. Turner, Theo A. ten Brummelaar +12
Long baseline optical and infrared interferometric arrays achieve high angular resolution and enable detailed astrophysical measurements. Interferometers have enabled observations…
CHARA Near-Infrared Imaging of the Yellow Hypergiant Star Cassiopeiae: Convection Cells and Circumstellar Envelope
Narsireddy Anugu, Fabien Baron, John D. Monnier +18
Massive evolved stars such as red supergiants and hypergiants are potential progenitors of Type II supernovae, and they are known for ejecting substantial amounts of matter, up to…
Long Term Evolution of Surface Features on the Red Supergiant AZ Cyg
Ryan P. Norris, Fabien R. Baron, John D. Monnier +23
We present H-band interferometric observations of the red supergiant (RSG) AZ Cyg made with the Michigan Infra-Red Combiner (MIRC) at the six-telescope Center for High Angular Reso…
CHARA Array adaptive optics: complex operational software and performance
Narsireddy Anugu, Theo ten Brummelaar, Nils H. Turner +18
The CHARA Array is the longest baseline optical interferometer in the world. Operated with natural seeing, it has delivered landmark sub-milliarcsecond results in the areas of stel…
CHARA/MIRC-X -- a high-sensitive six telescope interferometric imager concept, commissioning, and early science
Narsireddy Anugu, Jean-Baptiste Le Bouquin, John D. Monnier +14
MIRC-X is a six telescope beam combiner at the CHARA array that works in J and H wavelength bands and provides an angular resolution equivalent to a =331m diameter telescope. Th…
Visual Orbits of Spectroscopic Binaries with the CHARA Array. II. The eclipsing binary HD 185912
Kathryn V. Lester, Douglas R. Gies, Gail H. Schaefer +8
We present the visual orbit of the double-lined eclipsing binary, HD 185912, from long baseline interferometry with the CHARA Array. We also obtain echelle spectra from the Apache…
Visual Orbits of Spectroscopic Binaries with the CHARA Array. I. HD 224355
Kathryn V. Lester, Douglas R. Gies, Gail H. Schaefer +5
We present the visual orbit of the double-lined spectroscopic binary HD 224355 from interferometric observations with the CHARA Array, as well as an updated spectroscopic analysis…
The peculiar fast-rotating star 51 Oph probed by VEGA/CHARA
Narges Jamialahmadi, Philippe Berio, Anthony Meilland +15
Stellar rotation is a key in our understanding of both mass-loss and evolution of intermediate and massive stars. It can lead to anisotropic mass-loss in the form of radiative wind…
Spectroscopy, MOST Photometry, and Interferometry of MWC 314: Is it an LBV or an interacting binary?
Noel D. Richardson, Anthony F. J. Moffat, Raphaël Maltais-Tariant +34
MWC 314 is a bright candidate luminous blue variable that resides in a fairly close binary system, with an orbital period of 60.7530.003 d. We observed MWC 314 with a combinat…
The Expanding Fireball of Nova Delphini 2013
G. H. Schaefer, T. ten Brummelaar, D. R. Gies +34
A classical nova occurs when material accreting onto the surface of a white dwarf in a close binary system ignites in a thermonuclear runaway. Complex structures observed in the ej…
Improving the surface brightness-color relation for early-type stars using optical interferometry
M. Challouf, N. Nardetto, D. Mourard +18
The aim of this work is to improve the SBC relation for early-type stars in the color domain, using optical interferometry. Observations of eight B- and A-type…
Stellar Diameters and Temperatures V. Eleven Newly Characterized Exoplanet Host Stars
Kaspar von Braun, Tabetha S. Boyajian, Gerard T. van Belle +17
We use near-infrared interferometric data coupled with trigonometric parallax values and spectral energy distribution fitting to directly determine stellar radii, effective tempera…
Stellar Diameters and Temperatures III. Main Sequence A, F, G, & K Stars: Additional high-precision measurements and empirical relations
Tabetha S. Boyajian, Kaspar von Braun, Gerard van Belle +13
Based on CHARA Array measurements, we present the angular diameters of 23 nearby, main- sequence stars, ranging from spectral type A7 to K0, five of which are exoplanet host stars.…
Characterization of the Red Giant HR 2582 Using the CHARA Array
Ellyn K. Baines, Harold A. McAlister, Theo A. ten Brummelaar +7
We present the fundamental parameters of HR 2582, a high-mass red giant star whose evolutionary state is a mystery. We used the CHARA Array interferometer to directly measure the s…
Multiplicity of Galactic Cepheids from long-baseline interferometry I. CHARA/MIRC detection of the companion of V1334 Cygni
A. Gallenne, J. D. Monnier, A. Mérand +16
We aim at determining the masses of Cepheids in binary systems, as well as their geometric distances and the flux contribution of the companions. The combination of interferometry…