2012ApJ...756L..14P


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.17CET23:07:05

2012ApJ...756L..14P - Astrophys. J., 756, L14 (2012/September-1)

Recalibration of pagel's method for H II regions considering the thermal structure, the ionization structure, and the depletion of O into dust grains.

PENA-GUERRERO M.A., PEIMBERT A. and PEIMBERT M.

Abstract (from CDS):

Using a sample of 28 H II regions from the literature with measured temperature inhomogeneity parameter, t 2, we present a statistical correction to the chemical abundances determined with the Te(4363/5007) method. We used the t 2 values to correct the oxygen gaseous abundances and consider the oxygen depletion into dust to calculate the total abundances for these objects. This correction is used to obtain a new calibration of Pagel's strong-line method, R23, to determine oxygen abundances in H II regions. Our new calibration simultaneously considers the temperature structure, the ionization structure, and the fraction of oxygen depleted into dust grains. Previous calibrations in the literature have included one or two of these factors; this is the first time all three are taken into account. This recalibration reconciles the systematic differences among the temperatures found from different methods. We find that the total correction due to thermal inhomogeneities and dust depletion amounts to an increase in the O/H ratio of H II regions by factors of 1.7-2.2 (or 0.22-0.35 dex). This result has important implications in various areas of astrophysics such as the study of the higher end of the initial mass function, the star formation rate, and the mass-metallicity relation of galaxies, among others.

Abstract Copyright:

Journal keyword(s): galaxies: abundances - galaxies: ISM - H II regions - ISM: abundances

Simbad objects: 30

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Number of rows : 30

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 BA 1-671 HII 00 46 34.52 +42 11 33.7           ~ 20 1
2 NGC 346 Cl* 00 59 05.090 -72 10 33.24           ~ 443 0
3 NGC 456 HII 01 13 44.4 -73 17 26           ~ 113 0
4 LIN 500 Em* 01 13 50.896 -73 18 01.03   13.36 12.5 13.78 14.62 ~ 62 0
5 LHA 115-N 83C SNR 01 14 00.0 -73 17 08           ~ 68 0
6 NGC 460 Cl* 01 14 41.6 -73 17 51           ~ 37 1
7 NGC 595 HII 01 33 33.53 +30 41 29.8           ~ 188 0
8 NGC 604 HII 01 34 32.1 +30 47 01           ~ 540 0
9 SBSG 0335-052 bCG 03 37 44.04 -05 02 38.5     16.65     ~ 426 1
10 Cambridge 0357-392 H2G 03 59 08.90 -39 06 23.0           ~ 20 0
11 M 42 HII 05 35 17.3 -05 23 28           ~ 3684 0
12 RMC 136 Cl* 05 38 42.396 -69 06 03.36   9.63 9.50     ~ 1698 2
13 NGC 2363 G 07 28 29.83 +69 11 32.8   15.5       ~ 247 1
14 NGC 2403 AGN 07 36 51.396 +65 36 09.17 9.31 8.84 8.38 8.19   ~ 1582 1
15 NGC 2467 HII 07 52 18 -26 25.7           ~ 172 1
16 Mrk 116 PaG 09 34 02.1 +55 14 25           ~ 985 1
17 NGC 3576 HII 11 11 49.8 -61 18 14           ~ 222 2
18 NGC 3603 HII 11 15 24 -61 15.0           ~ 929 2
19 Mrk 209 bCG 12 26 16.02 +48 29 36.6   15.3       ~ 296 0
20 NGC 5253 AGN 13 39 55.990 -31 38 24.11 11.48 10.94 10.49 10.33   ~ 1254 4
21 NGC 5447 HII 14 02 28.0 +54 16 34           ~ 66 0
22 [H69] NGC 5457 40 PoG 14 03 31.300 +54 21 05.81           ~ 36 0
23 NGC 5461 HII 14 03 40.96 +54 19 02.4           ~ 170 0
24 NGC 5471 EmG 14 04 28.627 +54 23 52.84           ~ 227 1
25 M 20 OpC 18 02 42 -22 58.3           ~ 389 1
26 M 8 HII 18 03 37 -24 23.2           ~ 550 1
27 M 16 OpC 18 18 48 -13 48.4   6.58 6.0     ~ 926 2
28 NGC 6618 OpC 18 20 47 -16 10.3           ~ 1469 0
29 [H25] V HII 19 44 52.84 -14 43 09.8           ~ 58 0
30 LEDA 85193 H2G 21 49 48.2196 -38 54 08.587           ~ 19 0

    Equat.    Gal    SGal    Ecl

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2020.02.17-23:07:05

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