TDCOSMO - XXIII. Measurement of the Hubble constant from the doubly lensed quasar HE 1104−1805

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Volume 706 (February 2026)

A&A, 706 (2026) A270

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Table 2.

Galaxies and groups of galaxies identified as potential perturbers.

Perturber or Group	Number of galaxies	RA	Dec	Redshift	θ_E, SIS [^″]	log(Δ₃x)
P1	1	166.64076	–18.35770	(0.729)	$0 . 2_{- 0.2}^{+ 0.5}$ $0.2^{+0.5}_{-0.2}$	$- 4 . 2_{- 1.9}^{+ 0.5}$ $-4.2^{+0.5}_{-1.9}$
P2	1	166.64030	–18.35620	(0.729)	$0 . 2_{- 0.2}^{+ 0.6}$ $0.2^{+0.6}_{-0.2}$	$- 3 . 1_{- 1.9}^{+ 0.5}$ $-3.1^{+0.5}_{-1.9}$
P3	1	166.63993	–18.35468	(0.729)	$0 . 1_{- 0.1}^{+ 0.1}$ $0.1^{+0.1}_{-0.1}$	$- 4 . 5_{- 1.4}^{+ 0.6}$ $-4.5^{+0.6}_{-1.4}$
P4	1	166.63954	–18.35476	(0.729)	$0 . 3_{- 0.3}^{+ 0.3}$ $0.3^{+0.3}_{-0.3}$	$- 4 . 1_{- 1.2}^{+ 0.4}$ $-4.1^{+0.4}_{-1.2}$
P5	1	166.63818	–18.35526	0.3575	$0 . 37_{- 0.16}^{+ 0.16}$ $0.37^{+0.16}_{-0.16}$	$- 3 . 0_{- 0.5}^{+ 0.5}$ $-3.0^{+0.5}_{-0.5}$
P6	1	166.63770	–18.35497	0.505	$0 . 35_{- 0.27}^{+ 0.26}$ $0.35^{+0.26}_{-0.27}$	$- 3 . 3_{- 1.3}^{+ 0.4}$ $-3.3^{+0.4}_{-1.3}$
P7	1	166.63786	–18.35677	(0.729)	$0 . 2_{- 0.2}^{+ 0.7}$ $0.2^{+0.7}_{-0.2}$	$- 4 . 2_{- 1.8}^{+ 0.5}$ $-4.2^{+0.5}_{-1.8}$
P8	1	166.63765	–18.35777	(0.729)	$0 . 3_{- 0.3}^{+ 0.4}$ $0.3^{+0.4}_{-0.3}$	$- 3 . 7_{- 2.0}^{+ 0.5}$ $-3.7^{+0.5}_{-2.0}$

							R₂₀₀ [^″]	v_disp [km s⁻¹]	R_s[^″]
Group 1	6	166.63123	–18.34910	0.441	3.9 $_{- 1.9}^{+ 3.7}$ $^{+3.7}_{-1.9}$	–3.4 $_{- 1.1}^{+ 1.3}$ $^{+1.3}_{-1.1}$	$194_{- 70}^{+ 52}$ $194^{+52}_{-70}$	$383_{- 117}^{+ 94}$ $383^{+94}_{-117}$	$26 . 2_{- 9.4}^{+ 8.0}$ $26.2^{+8.0}_{-9.4}$
Group 2	11	166.63579	–18.36816	0.495	2.4 $_{- 0.9}^{+ 1.7}$ $^{+1.7}_{-0.9}$	–3.2 $_{- 0.9}^{+ 1.3}$ $^{+1.3}_{-0.9}$	$148_{- 132}^{+ 33}$ $148^{+33}_{-132}$	$314_{- 280}^{+ 83}$ $314^{+83}_{-280}$	$20 . 9_{- 19.6}^{+ 6.9}$ $20.9^{+6.9}_{-19.6}$
Group 3	7	166.62309	–18.36606	0.506	2.8 $_{- 1.2}^{+ 2.6}$ $^{+2.6}_{-1.2}$	–3.5 $_{- 0.6}^{+ 0.6}$ $^{+0.6}_{-0.6}$	$163_{- 49}^{+ 49}$ $163^{+49}_{-49}$	$354_{- 97}^{+ 93}$ $354^{+93}_{-97}$	$24 . 3_{- 7.8}^{+ 8.0}$ $24.3^{+8.0}_{-7.8}$
Group 4	7	166.62614	–18.34243	0.577	3.7 $_{- 1.7}^{+ 3.4}$ $^{+3.4}_{-1.7}$	–3.4 $_{- 0.8}^{+ 0.9}$ $^{+0.9}_{-0.8}$	$183_{- 45}^{+ 30}$ $183^{+30}_{-45}$	$418_{- 109}^{+ 85}$ $418^{+85}_{-109}$	$30 . 4_{- 9.3}^{+ 7.6}$ $30.4^{+7.6}_{-9.3}$
Group 5	7	166.63055	–18.34246	0.578	2.7 $_{- 1.1}^{+ 2.4}$ $^{+2.4}_{-1.1}$	–3.5 $_{- 0.7}^{+ 0.8}$ $^{+0.8}_{-0.7}$	$153_{- 45}^{+ 30}$ $153^{+30}_{-45}$	$359_{- 88}^{+ 68}$ $359^{+68}_{-88}$	$25 . 3_{- 7.3}^{+ 5.9}$ $25.3^{+5.9}_{-7.3}$
Group 6	7	166.63574	–18.34827	0.580	2.6 $_{- 0.9}^{+ 1.4}$ $^{+1.4}_{-0.9}$	–2.8 $_{- 0.9}^{+ 0.9}$ $^{+0.9}_{-0.9}$	$152_{- 45}^{+ 30}$ $152^{+30}_{-45}$	$334_{- 98}^{+ 88}$ $334^{+88}_{-98}$	$23 . 1_{- 8.0}^{+ 7.6}$ $23.1^{+7.6}_{-8.0}$

Notes. Top table: Properties of the perturbers identified on the HST imaging within 5^″ of the lens. Einstein radii and flexion shifts based on their luminosity and the M/L ratio computed with P5. Redshifts in parentheses are assumed. Bottom table: Characteristics of the groups of galaxies with log(Δ₃x) > -4.

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