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Table 2

Voigt-profile fits and AOD measurements of high-ion absorption in the PDLA toward Q0841+129.

Ion Comp. v0a b log N log Ntotb log Na(strong)c log Na(weak)c v − ,v + d
( km s-1) ( km s-1) (N in  cm-2) (N in  cm-2) (N in  cm-2) (N in  cm-2) ( km s-1)
Si iv C1 ... ...  < 11.72 13.63  ±  0.01 13.60  ±  0.01 13.63  ±  0.01  −50, 80
... C2  −13  ±  1 16.7  ±  0.4 13.34  ±  0.01 ... 13.28  ±  0.01 13.28  ±  0.01  −100, 0
... C3 15  ±  1 9.9  ±  0.6 12.88  ±  0.02 ... ... ...
... C4 51  ±  1 12.5  ±  0.3 13.06  ±  0.01 ... ... ...
... C5 ... ...  < 11.86 ... ... ...
C iv C1  −57  ±  3 19.2  ±  3.2 12.78  ±  0.13 13.89  ±  0.03 13.89  ±  0.01 (blended)  −100,120
... C2  −12  ±  1 27.3  ±  3.1 13.53  ±  0.04 ... 13.49  ±  0.01 13.49  ±  0.01  −100, 0
... C3 17  ±  1 8.8  ±  1.8 12.69  ±  0.14 ... ... ...
... C4 55  ±  1 15.8  ±  0.3 13.48  ±  0.01 ... ... ...
... C5 102  ±  1 9.4  ±  1.5 12.40  ±  0.05 ... ... ...
O vie C1  −55  ±  3 25.0  ±  2.5 13.87  ±  0.06 13.99  ±  0.11 13.97  ±  0.01 13.93  ±  0.01  −100, 0
... C2  − 8  ±  5 24.3  ±  17.5 13.39  ±  0.32 ... ... ...
N vf C1 ... ... ... ...  <12.57  <12.86  −100, 0

Notes. 

(a)

Velocity centroid relative to zabs = 2.47621.

(b)

Total VPFIT column density, summed over all components, with errors added in quadrature.

(c)

Apparent column density measured from strong and weak doublet lines in velocity interval indicated.

(d)

Velocity range used in AOD integration, relative to zabs.

(e)

Voigt fit for O vi only possible in components C1 and C2. O vi AOD measurements made over velocity region where the profiles of the two doublet lines overlap. The C iv, Si iv, and N v measurements are repeated over this interval so the ionic ratios can be derived.

(f)

No detection in either N v line. Upper limits are 3σ.

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