TY - JOUR
T1 - Pre-nova Observations of T CrB
T2 - A View from the CHARA Array
AU - Norris, Ryan
AU - Anugu, Narsireddy
AU - Gaudin, Thomas
AU - Otulakowska-Hypka, Magdalena
AU - Kaczmarek, Fabian
AU - Caruso, Cameron
AU - Gustafson, Cody
AU - Kotowski, Andrew
AU - Proni, Rebecca
AU - Roy, Nirupam
AU - Baron, Fabien
AU - Banerjee, Dipankar P.K.
AU - Baylis-Aguirre, Dana K.
AU - Creech-Eakman, Michelle J.
AU - Linford, Justin
AU - Gallenne, Alexandre
AU - Mikołajewska, Joanna
AU - Monnier, John D.
AU - Mourard, Denis
AU - Munari, Ulisse
AU - Nardetto, Nicolas
AU - Roettenbacher, Rachael M.
AU - Sokoloski, Jennifer L.
AU - Williams, Montana
AU - Woodward, C. E.
AU - Kraus, Stefan
AU - Le Bouquin, Jean Baptiste
AU - Chhabra, Sorabh
AU - Codron, Isabelle
AU - Ennis, Jacob
AU - Gardner, Tyler
AU - Gutierrez, Mayra
AU - Ibrahim, Noura
AU - Lanthermann, Cyprien
AU - Setterholm, Benjamin R.
AU - Farrington, Christopher D.
AU - Majoinen, Olli
AU - Vargas, Norm
AU - Gies, Douglas R.
AU - Schaefer, Gail H.
AU - ten Brummelaar, Theo
N1 - Publisher Copyright:
© 2026. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the https://creativecommons.org/licenses/by/4.0/. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
PY - 2026/6/10
Y1 - 2026/6/10
N2 - T Coronae Borealis (T CrB, HD 143454) 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 Center for High Angular Resolution Astronomy (or CHARA) Array observations collected with MIRC-X (H band) and MYSTIC (K band) in 2022–2025. We fit limb-darkened disk models constrained with literature limb-darkening coefficients to the squared visibilities as only the first visibility lobe is sampled. The average limb-darkened diameter of the star across these epochs is 0.70 ± 0.04 mas in the H band and 0.72 ± 0.07 mas in the K band. Adopting a distance of (Formula presented) 914−22+24 pc, the corresponding stellar radius is 69 ± 5 R⊙ in the H band and 71 ± 8 R⊙ in the K band. These values are consistent with the Roche-lobe volume radius of 71 R⊙ inferred from published orbital solutions. These measurements provide a preeruption angular diameter and support a Roche-lobe-filling donor.
AB - T Coronae Borealis (T CrB, HD 143454) 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 Center for High Angular Resolution Astronomy (or CHARA) Array observations collected with MIRC-X (H band) and MYSTIC (K band) in 2022–2025. We fit limb-darkened disk models constrained with literature limb-darkening coefficients to the squared visibilities as only the first visibility lobe is sampled. The average limb-darkened diameter of the star across these epochs is 0.70 ± 0.04 mas in the H band and 0.72 ± 0.07 mas in the K band. Adopting a distance of (Formula presented) 914−22+24 pc, the corresponding stellar radius is 69 ± 5 R⊙ in the H band and 71 ± 8 R⊙ in the K band. These values are consistent with the Roche-lobe volume radius of 71 R⊙ inferred from published orbital solutions. These measurements provide a preeruption angular diameter and support a Roche-lobe-filling donor.
KW - Binary stars (154)
KW - High angular resolution (2167)
KW - Interferometric binary stars (806)
KW - Long baseline interferometry (932)
KW - Optical interferometry (1168)
KW - Recurrent novae (1366)
KW - Symbiotic binary stars (1674)
UR - https://www.scopus.com/pages/publications/105041147048
UR - https://www.scopus.com/pages/publications/105041147048#tab=citedBy
U2 - 10.3847/2041-8213/ae71d0
DO - 10.3847/2041-8213/ae71d0
M3 - Article
AN - SCOPUS:105041147048
SN - 2041-8205
VL - 1004
JO - Astrophysical Journal Letters
JF - Astrophysical Journal Letters
IS - 1
M1 - L13
ER -