First measurement of narrow-line flux ratios for a lensed quasar with JWST/NIRSpec IFS

arXiv:2606.23808 · astro-ph.GA, astro-ph.CO · Submitted 2026-06-22 · Read on arXiv

Hadrien Paugnat, Tommaso Treu, Anna M. Nierenberg, Anowar J. Shajib, Shawn Knabel, Daniel Gilman

astro-ph.GA, astro-ph.CO

Submitted: 2026-06-22

Comments: 18 pages, 9 figures, submitted to Physical Review D

Code: https://github.com/ajshajib/regaljumperhttps:

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Aperture — 15× in this paper · explained in 1 episode
• Microlensing — 13× in this paper · explained in 2 episodes
• Gravitational Lensing — 5× in this paper · explained in 2 episodes
• Accuracy — 2× in this paper · explained in 1 episode
• Core — 2× in this paper · explained in 2 episodes
• Matter Power Spectrum — 2× in this paper · explained in 2 episodes
• AGN — 1× in this paper · explained in 1 episode
• Abundance — 1× in this paper · explained in 1 episode
• Calibration — 1× in this paper · explained in 7 episodes
• Cold Dark Matter — 1× in this paper
• Consistency — 1× in this paper · explained in 3 episodes
• Hubble Space Telescope — 1× in this paper
• James Webb Space Telescope — 1× in this paper
• NIRSpec with Integral Field Spectroscopy — 1× in this paper
• Particle Swarm Optimization — 1× in this paper
• alpha — 1× in this paper · explained in 1 episode

Sources

• Detection of a dark matter subhalo in the strongly lensed system PJ011646
• JWST lensed quasar dark matter survey IV: Stringent warm dark matter constraints from the joint reconstruction of extended lensed arcs and quasar flux ratios
• JWST Lensed Quasar Dark Matter Survey III: Dark Matter Sensitive Flux Ratios and Warm Dark Matter Constraint from the Full Sample
• Measurement of the minimum cold dark matter halo mass with strong gravitational lensing
• Improved dark matter measurements with flexible modeling of resolved strongly-lensed quasar narrow-line emission
• $\texttt{raccoon}$: A Python package for removing wiggle artifacts in the JWST NIRSpec integral field spectroscopy
• Investigation of mass substructure in gravitational lens system SDP.81 with ALMA long-baseline observations

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