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 Roche-lobe overflow play in this process is crucial to improving our understanding of these binaries and connecting them to important transi...
T. Gaudin, R. Norris, M. Otulakowska-Hypka et al.· 0 citations
Yellow hypergiants are rare, evolved massive stars generally interpreted as post-red-supergiant objects evolving blueward through or near the dynamically unstable yellow evolutionary void. V509 Cassiopeiae is a remarkable example: its spectroscopically inferred effective temperature increased from approximately 5000 K...
N. Anugu, G. Schaefer, D. Gies et al.· Astrophysical Journal· 0 citations
Accurate and unbiased determination of stellar parameters is of importance in many astrophysical domains.
We therefore present an improved method to estimate stellar parameters, based on interferometric observations and stellar atmosphere models, as well as spectroscopic and photometric data.
We estimate he fundamental...
N. Ebrahimkutty, D. Mourard, P. Bério et al.· Astronomy & Astrophysics· 0 citations
The NAIR project – Novel Astronomical Instrumentation based on photonic light Reformatting – aims at advancing photonic technologies for infrared long-baseline interferometry and precision spectroscopy. The rapid development of astrophotonics over the past decade has opened new pathways for astronomical instrumentation...
L. Labadie, R. J. Harris, K. Madhav et al.· Astronomical Telescopes + In...· 0 citations
Long-baseline interferometric observations in the Near Infrared reach angular resolutions on the order of milliarcseconds. With the long baselines of the CHARA array, science cases such as exozodiacal dust of early-type main sequence stars can be probed to study early-stage planet formation with percentage-precision vi...
K. Barjot, A. Dinkelaker, N. Scott et al.· Astronomical Telescopes + In...· 0 citations
We present the instrument description and the first on-sky observations for the new CHara ARray Integrated Optics Testbench (CHARIOT) at the CHARA Array. CHARIOT is a 2-telescope proof-of-concept instrument that utilises a fibre-connectorised beam combiner fabricated by ultrafast laser-inscription in Infrasil quartz...
A. Dinkelaker, K. Barjot, N. Scott et al.· Monthly notices of the Royal...· 0 citations
The Center for High Angular Resolution Astronomy (CHARA) Array is a six-element interferometer at Mount Wilson Observatory with baselines ranging from 34 to 331m. The Array hosts a number of new or upgraded, six-telescope beam combiners that span the spectrum from the visible R-band to the near-infrared K-band with a r...
D. Gies, G. Schaefer, N. Scott et al.· Astronomical Telescopes + In...· 0 citations
The suite called Stellar Parameters and Images with a Cophased Array (SPICA) has two interferometric instruments installed at the focus of the CHARA Array located at Mount Wilson, CA. SPICA is made of SPICA-VIS, a fiber-fed six-beam visible spectrograph with three spectral resolutions, and SPICA-FT, a six-beam near-inf...
D. Mourard, P. Bério, C. Bailet et al.· Astronomy & Astrophysics· 2 citations
Dual-field interferometry uses a bright reference star for real-time fringe tracking, allowing a second beam combiner to record long coherent integrations on a fainter off-axis science target. At the Center for High Angular Resolution Astronomy (CHARA) Array, we implement this mode using the six-telescope MIRC-X and MY...
N. Anugu, J. Monnier, D. Gies et al.· Astronomical Telescopes + In...· 0 citations
Estimations of stellar angular diameters can be determined based on the surface brightness-colour relation (SBCR) and photometry. In the context of the PLATO space mission, the SBCR is considered to be an independent empirical alternative for estimating the stellar radii of FGK stars.
We implemented a homogeneous appro...
R. I. Ibañez Bustos, D. Mourard, N. Nardetto et al.· Astronomy & Astrophysics· 0 citations
Long-baseline optical interferometry provides spatially resolved observations of close binaries, complementing spectroscopic and photometric constraints on stellar parameters.
With the capabilities of the new visible CHARA/SPICA instrument and the multiple spectral band operation of CHARA, our goal is to resolve orbits...
J. Jonák, D. Mourard, J. Monnier et al.· Astronomy & Astrophysics· 0 citations
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