Parameter | R23 | N2 | O3N2 | ||||||||||
calibrationa | P01 | PT05 | N06 | M91 | KD02 | KK04 | D02 | PP04 | N06 | PP04 | N06 | ||
Averageb | 0.07 | 0.08 | 0.14 | 0.15 | 0.28 | 0.27 | 0.14 | 0.12 | 0.18 | 0.12 | 0.21 | ||
![]() |
0.05 | 0.07 | 0.12 | 0.11 | 0.18 | 0.13 | 0.10 | 0.10 | 0.14 | 0.10 | 0.16 | ||
Notesd | B/A (1) | B/A | (2) | S.H. | S.H. | S.H. | S.H. (3) | B/A (4) | S.L.(5) | B/A (6) | S.L. |
Notes. (a) The
names of the calibrations are the same as in Table A.2. (b) Average
value (in absolute values) of the difference between the abundance
given by empirical calibrations and that obtained using the direct
method. The names of the calibrations are the same as in Table A.2. (c) Dispersion
(in absolute values) of the difference between the abundance given by
empirical calibrations and that obtained using the direct method. (d) We
indicate if the empirical calibration gives results both below and
above the direct value (B/A), if they are systematically higher than
the direct value (S.H.) or if they are systematically lower than the
direct value (S.L.). Some additional notes are: (1) Higher deviation in
the low branch. (2) This calibration provides lower oxygen abundances
in low-metallicity regions and higher oxygen abundances in
high-metallicity regions. (3) Systematically higher only for .
(4) Higher deviation for
.
Considering
,
we get average = 0.08 and
.
(5) Higher deviation at lower oxygen abundances. (6) Higher deviation
for
.
Assuming
,
average = 0.09 and
.
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