Cosmology with supernova Encore in the strong lensing cluster MACS J0138–2155
S. H. Suyu; Ana Acebrón; C. Grillo; P. Bergamini; G. B. Caminha; S. Cha; J. M. Diego; S. Ertl · 2026 · Astronomy and Astrophysics
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Abstract
Robust mass modeling of strong-lensing galaxy clusters is crucial for studying cosmology and galaxy evolution. We present and compare seven mass models of the galaxy cluster MACS J0138−2155, constructed using six independent modeling software programs, including parametric and free-form approaches. By conducting a blind analysis where all the mass-modeling teams constructed their models independently without exchanging results, we quantified uncertainties arising from modeling software and assumptions. MACS J0138−2155 is unique as the only cluster found to strongly lens two supernovae (SNe), R
Abstract by S. H. Suyu; Ana Acebrón; C. Grillo; P. Bergamini; G. B. Caminha; S. Cha; J. M. Diego; S. Ertl, Astronomy and Astrophysics (2026) — licensed CC BY 4.0.
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Metadata source: OpenAlex · DOI 10.1051/0004-6361/202557235