Table 4: Physical parameters of the $z_{\rm abs}$ = 1.5955, 1.5401 and 1.4649 metal absorbers towards HS 0747+4259 derived by the MCI procedure with the Haardt & Madau and modified UV background spectra (marked, respectively, by HM96, S1, and S2 in Fig. 2). Column densities are given in cm-2.
  $z_{\rm abs}$=1.5955 $z_{\rm abs}$=1.5401 $z_{\rm abs}$=1.4649
Parametera HM96 S2 HM96 S2 HM96 S1 S2
(1) (2) (3) (4) (5) (6) (7) (8)
U0 2.4E-1 5.5E-2 1.8E-1 2.7E-2 $\ga$3.4E-1 $\ga$1.8E-1 $\ga$8.8E-2
$N_{\rm H}$ 1.0E20 1.6E19 2.2E18 4.7E17 6.8E19 2.6E19 1.3E19
$\sigma_{v}$, km s-1 32.7 29.3 13.1 12.2 22.0 21.0 23.2
$\sigma_{y}$ 0.64 0.60 0.83 0.41 0.46 0.60 0.35
$Z_{\rm C}$ 6.5E-6 4.4E-5 2.6E-5 1.5E-4 3.4E-6 6.8E-6 2.0E-5
$Z_{\rm N}$ <4.5E-7 <3.0E-6 <1.1E-5 <3.6E-5 $\ldots$ $\ldots$ $\ldots$
$Z_{\rm O}$ 3.2E-5 1.5E-4 7.4E-5 2.7E-4 1.8E-5 3.7E-5 6.0E-5
$Z_{\rm Si}$ 2.2E-6 7.6E-6 3.5E-6 1.8E-5 $\ldots$ $\ldots$ $\ldots$
$[Z_{\rm C}]$ -1.57 -0.74 -0.98 -0.21 -1.86 -1.55 -1.10
$[Z_{\rm N}]$ <-2.1 <-1.3 <-0.74 <-0.2 $\ldots$ $\ldots$ $\ldots$
$[Z_{\rm O}]$ -1.15 -0.50 -0.80 -0.23 -1.40 -1.10 -0.90
$[Z_{\rm Si}]$ -1.17 -0.63 -0.99 -0.26 $\ldots$ $\ldots$ $\ldots$
N(H  I) 2.7E15 $(2.5\pm0.5)$E15 3.5E14 $(3.4\pm0.6)$E14 6.8E14 6.8E14 $(7.0\pm2.0)$E14
N(C  III) 3.8E13 $(3.6\pm0.6)$E13 1.6E13b 1.3E13b 2.6E12 2.6E12 $(1.8\pm0.9)$E12
N(O  III) 1.9E14b 9.0E13b $\ldots$ $\ldots$ $\ldots$ $\ldots$ $\ldots$
N(Si  III) 2.7E11 1.1E12 $\ldots$ $\ldots$ $\ldots$ $\ldots$ $\ldots$
N(C  IV) 9.0E13 $(9.1\pm0.4)$E13 1.45E13 $(1.75\pm0.15)$E13 1.2E13 1.1E13 $(1.2\pm0.1)$E13
N(Si  IV) 5.2E11 $(1.00\pm0.15)$E12 6.1E11 $(5.9\pm0.6)$E11 $\ldots$ $\ldots$ $\ldots$
N(N  V) <7.5E12 <9.5E12 <4.0E12 <4.0E12 $\ldots$ $\ldots$ $\ldots$
N(O  VI) 4.5E14 $(4.2\pm0.8)$E14 1.7E13 $(1.9\pm0.4)$E13 1.7E14 1.7E14 $(1.70\pm0.35)$E14
$\langle T \rangle$, K 3.5E4 3.0E4 2.8E4 2.0E4 $\ga$4.8E4 $\ga$4.8E4 $\ga$3.3E4
$n_{\rm H}$, cm-3 1.2E-4 5.1E-4 1.9E-4 1.2E-3 $\la$6.7E-5 $\la$1.5E-4 $\la$3.0E-4
L, kpc 280 10 4 0.13 $\ga$280 $\ga$60 $\ga$15
$^a\;Z_{\rm X} = N_{\rm X}/N_{\rm H}$; $[Z_{\rm X}] = \log~ (N_{\rm X}/N_{\rm H}) - \log~ (N_{\rm X}/N_{\rm H})_\odot$; b calculated using the velocity and density distributions estimated from the metal profiles marked by the horizontal bold lines in Fig. 5 ( $z_{\rm abs}$ = 1.59) and in Fig. 6 ( $z_{\rm abs}$ = 1.54).

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