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
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
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