Table 1 Summary of CGM parameters

From: Gravitational lensing reveals cool gas within 10-20 kpc around a quiescent galaxy

Arc

ρ

Area

\({W}_{r}^{\lambda 2796}\)

\({\log }_{10}{N}_{{{\rm{MgII}}}}\)

b

\({\log }_{10}{N}_{{{\rm{HI}}}}\)

Δv

\({\log }_{10}{M}_{{{\rm{HI}}}}\)

 

(kpc)

(sq")

(Å)

(atoms cm−2)

(km/s)

(atoms cm−2)

(km/s)

(M⊙)

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

a

14.4

0.52

0.62 ± 0.06

13.24 ± 0.05

297 ± 47

19.1–20.3

−227 ± 53

6.2–7.4

b

14.6

0.74

0.96 ± 0.08

13.51 ± 0.04

332 ± 44

19.5–20.4

−126 ± 51

6.8–7.7

c

18.9

0.26

<0.315

<13.2

    

d

11.1

0.75

1.31 ± 0.08

13.58 ± 0.05

305a

19.7–20.4

−255 ± 55

7.1–7.8

  1. Column (1) arc ID, (2) impact parameter, (3) area probed by the arc, (4) rest-frame equivalent width of MgII λ2796, (5) MgII column density, (6) velocity dispersion, (7) HI column density converted from \({W}_{r}^{\lambda 2796}\)45, (8) velocity offset with respect to the galaxy, (9) gas mass in HI probed by the arcs8.
  2. aThe velocity width of arc (d) was unconstrained by the data (see section “Methods” subsection “KCWI observations”) so the b parameter was fixed during the fit.
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