2006A&A...457..477K


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.16CEST23:09:32

2006A&A...457..477K - Astronomy and Astrophysics, volume 457, 477-484 (2006/10-2)

A spectroscopic study of the near-IR [SIII] lines in a sample of HII galaxies: chemical abundances.

KEHRIG C., VILCHEZ J.M., TELLES E., CUISINIER F. and PEREZ-MONTERO E.

Abstract (from CDS):

A detailed spectroscopic study covering the blue to near-infrared wavelength range (λ3700Å-1µm) was performed for a sample of 34 HII galaxies in order to derive fundamental parameters for their HII regions and ionizing sources, as well as gaseous metal abundances. All the spectra included the nebular [SIII]λλ9069,9532Å lines, given their importance in the derivation of the S/H abundance and relevant ionization diagnostics. A systematic method was followed to correct the near-IR [SIII] line fluxes for the effects of the atmospheric transmission. A comparative analysis of the predictions of the empirical abundance indicators R23 and S23 was performed for our sample galaxies. The relative hardness of their ionizing sources was studied using the η' parameter and exploring the role played by metallicity. For 22 galaxies of the sample, a value of the electron temperature Te[SIII] was derived, along with their ionic and total S/H abundances. Their ionic and total O/H abundances were derived using direct determinations of Te[OIII]. For the rest of the objects, the total S/H abundance was derived using the S23 calibration. The abundance range covered by our sample goes from 1/20 solar up to solar metallicity. Six galaxies present 12+log(O/H)<7.8dex. The mean S/O ratio derived in this work is log (S/O)=-1.68±0.20dex, 1σ below the solar (S/O) value. The S/O abundance ratio shows no significant trend with O/H over the range of abundance covered in this work, in agreement with previous findings. There is a trend for HII galaxies with lower gaseous metallicity to present harder ionizing spectra. We compared the distribution of the ionic ratios O+/O++ vs. S+/S++ derived for our sample with the predictions of a grid of photoionization models performed for three different stellar effective temperatures. This analysis indicates that a large fraction of galaxies in our sample seem to be ionized by extremely hard spectra, in line with recent suggestions for extra ionizing sources in HII galaxies.

Abstract Copyright:

Journal keyword(s): ISM: abundances - HII regions - galaxies: abundances - galaxies: dwarf - galaxies: evolution

Simbad objects: 35

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Number of rows : 35

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 LEDA 1549 H2G 00 24 42.4 +01 44 02 16.58 16.91 16.51 16.21 15.89 ~ 24 0
2 UM 69W EmO 00 48 22.70 +04 05 21.0           ~ 4 0
3 UM 69E H2G 00 48 22.7 +04 05 21           ~ 3 0
4 6dFGS gJ010702.1-383152 H2G 01 07 02.16 -38 31 52.2   16.5       ~ 17 0
5 2MASX J01103497+0206508 H2G 01 10 34.9835366204 +02 06 50.970422335   16       ~ 19 0
6 UGC 749 H2G 01 11 30.912 +01 19 17.09   14.8   14.7 14.7 ~ 46 0
7 6dFGS gJ011957.0-411406 G 01 19 56.998 -41 14 06.04   14.39   14.09   ~ 7 0
8 6dFGS gJ012646.5-003845 H2G 01 26 46.599 -00 38 46.08   17   15.46   ~ 52 0
9 LEDA 74004 H2G 01 43 02.9012 -41 49 41.077           ~ 11 0
10 UGC 1240 GiC 01 46 20.67 +04 15 50.1   14.9       ~ 34 0
11 Mrk 1169 H2G 01 57 38.913 +02 25 24.16   17.0       ~ 23 0
12 Mrk 585 AGN 02 03 30.406 +02 33 58.49   15.5 15.70     ~ 29 0
13 UM 396 EmO 02 07 26.4 +02 56 55   18       ~ 25 0
14 LEDA 8377 H2G 02 11 23.5 +02 20 30   18       ~ 39 0
15 UM 417 EmO 02 19 30.236 -00 59 06.46 17.71 18.15 17.57 17.44 17.35 ~ 29 0
16 SCHG 0226-390 H2G 02 28 11.40 -38 49 16.0           ~ 12 0
17 SCHG 0306-405 H2G 03 08 42.10 -40 24 30.0           ~ 11 0
18 6dFGS gJ034249.5-403555 H2G 03 42 49.4 -40 35 56 15.90 16.41 15.75 16.05 15.55 ~ 30 0
19 CTS 1006 H2G 04 42 09.70 -45 25 14.0   16.91   16.28   ~ 9 0
20 CTS 1008 H2G 04 51 39.30 -31 52 51.0           ~ 8 0
21 LEDA 75352 H2G 05 29 57.4060 -38 18 07.186           ~ 12 0
22 SCHG 0538-416 H2G 05 40 07.50 -41 37 06.0           ~ 8 0
23 UGCA 116 H2G 05 55 42.645 +03 23 32.23 10.74 11.68 11.46   11.82 ~ 508 0
24 ESO 338-4 IG 19 27 58.338 -41 34 30.81   13.55 13.21 13.14 13.43 ~ 212 1
25 LEDA 84918 H2G 20 23 06.2078 -40 20 32.868           ~ 8 0
26 2dFGRS TGS828Z115 H2G 21 41 38.4 -39 31 32   17.33   16.69   ~ 10 0
27 LEDA 85193 H2G 21 49 48.2196 -38 54 08.587           ~ 20 0
28 ESO 533-14 H2G 22 19 50.6341761708 -26 20 29.679881577   13.75   12.95   ~ 24 0
29 SCHG 2240-384 H2G 22 43 32.3816 -38 11 23.851           ~ 10 0
30 NGC 7667 H2G 23 24 22.839 -00 06 30.16 13.52 14.47 14.05 13.89 13.58 ~ 69 1
31 SDSS J232423.51-000513.6 G 23 24 23.511 -00 05 13.65           ~ 4 0
32 UM 166 Sy1 23 32 45.032 -00 58 45.83           ~ 10 0
33 NGC 7714 GiP 23 36 14.099 +02 09 18.07   14.91 14.36     ~ 739 1
34 APG 284 PaG 23 36 19 +02 09.3   12.6       ~ 605 0
35 NAME Local Group GrG ~ ~           ~ 7235 0

    Equat.    Gal    SGal    Ecl

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2021.04.16-23:09:32

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