Excessive external shear in ellipsoidal lens models of quadruply-lensed quasar NLRs always resolves position anomalies and reduces flux-ratio anomalies, concealing signals commonly attributed to dark-matter substructure.
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2 Pith papers cite this work, alongside 36 external citations. Polarity classification is still indexing.
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2026 2verdicts
CONDITIONAL 2representative citing papers
A subhalo of M200 = 2.78e10 solar masses and concentration 30 is detected at 5.8 sigma in PJ011646 via ALMA imaging and grid-based NFW search after fitting an elliptical power-law plus multipole macromodel.
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The Subversive Role of Excessive External Shear in Concealing Lensing Anomalies
Excessive external shear in ellipsoidal lens models of quadruply-lensed quasar NLRs always resolves position anomalies and reduces flux-ratio anomalies, concealing signals commonly attributed to dark-matter substructure.
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Detection of a dark matter subhalo in the strongly lensed system PJ011646
A subhalo of M200 = 2.78e10 solar masses and concentration 30 is detected at 5.8 sigma in PJ011646 via ALMA imaging and grid-based NFW search after fitting an elliptical power-law plus multipole macromodel.