Varstrometry for Off-nucleus and Dual Subkiloparsec AGN (VODKA): Three Quadruply Lensed Quasars at Cosmic Noon in HST and JWST

Abstract

We present results from imaging observations of three quadruply lensed quasars by Hubble Space Telescope (HST) and James Webb Space Telescope (JWST) at redshifts $z = 2.550$, 2.975, and 1.500. We model our targets assuming a singular isothermal ellipsoid mass profile and an elliptical SÃ\c{opyright}rsic profile for the lensing galaxies, and reconstruct the geometric configuration of each system with measured Einstein radii of 0.44$'$, 0.58$'$, and 0.49$'$. While no spectroscopic measurements are available for the lenses, we constrain the redshift of each lens to $0.5 < z < 1.2$, $1.0 < z < 1.5$, and $0.4 < z < 0.9$. For all three lenses, the best-fit light model yield a typical de Vaucouleurs $n_{\rm S\acute{e}rsic} \sim 4$ profile and an effective radius $R_e$ around $\sim 1.5 - 3.5$ kpc. We accordingly classify the three lenses as early-type galaxies at an intermediate to high redshift, a common type for strong lensing galaxies. Compared to other known quadruple lenses, the lensing galaxies in this work are at the lower end of the distribution of Einstein radii and upper end of the distribution of the lens redshifts. They represent an interesting quadrant of subarcsecond-separation lenses in the population of single-galaxy strong lensing which have been largely unexplored yet and will be great targets of interest in upcoming high-resolution lensing surveys.

Figures (11)

• Figure 1: Images of J2218-3322 in the HST WFC3 F475W and F814W band.
• Figure 2: Images of J0803+3908 in the JWST NIRCam F115W, F200W, F277W, and F356W band.
• Figure 3: Images of J0813+2545 in the JWST NIRCam F115W, F200W, F277W, and F356W band. Voids in the two long filters are saturated pixels blanked out during data reduction.
• Figure 4: Best-fit models for J2218-3322 with Lenstronomy in the F814W band. Each panel from left to right presents the observed image, the reconstructed image, the normalized residual map, and the magnification map.
• Figure 5: Best-fit models for J0803+3908 with Lenstronomy in the F200W band. Panels are arranged in the same convention as in Fig. \ref{['fig.hst_f']}.