2011PASP..123...44H


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.24CEST02:19:47

2011PASP..123...44H - Publ. Astron. Soc. Pac., 123, 44-57 (2011/January-0)

Spectrophotometry of southern H II regions and strong-line diagnostics.

HAWLEY S.A.

Abstract (from CDS):

Emission-line intensities covering the wavelength range λλ3727-6731 are presented for 18 southern hemisphere Galactic H II regions. Although these observations were made three decades ago, several of the H II regions in this sample have not been extensively observed over this range of wavelengths. Combining these data with previously published line intensities for a northern hemisphere set of H II regions yields a sample of 30 nebulae distributed in galactocentric distance from 5.9 to 12.8 kpc, observed and analyzed in a similar way. Nitrogen and oxygen abundances are determined in a subset of 11 nebulae when a traditional two-zone direct treatment of forbidden-line measurements is possible. Direct abundance measurements in these 11 nebulae also allow an assessment of two strong-line diagnostics, [N II]/[O II] and [O III]/[N II], which have been used as proxies for O/H abundances in extragalactic H II regions and star-forming galaxies. The results suggest that the [N II]/[O II] and [O III]/[N II] are robust with respect to applicability to the range of conditions characteristic of Galactic nebulae, extragalactic H II regions, and star-forming galaxies. The similarity of the resultant O/H gradients between the direct and strong-line methods implies that relative abundances are reliable for each. The direct and [O III]/[N II] absolute abundances are in general agreement, while the [N II]/[O II] diagnostic gives systematically higher absolute abundances, consistent with findings of other investigators. These data allow for an independent calibration of the [O III]/[N II] diagnostic in the near-solar metallicity regime. A conversion relationship between these two strong-line diagnostics based on abundances in these Galactic H II regions is similar to the one determined for star-forming galaxies.

Abstract Copyright:

Journal keyword(s): ISM

Simbad objects: 29

goto Full paper

goto View the reference in ADS

Number of rows : 29

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 NGC 281 HII 00 52 25.1 +56 33 54           ~ 229 1
2 NGC 300 GiG 00 54 53.4460065856 -37 41 03.182962667 8.83 8.69 8.13 7.46   ~ 1328 2
3 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5762 1
4 M 42 HII 05 35 17.3 -05 23 28           ~ 3751 0
5 NAME Ori A MoC 05 38 -07.1           ~ 2697 0
6 NGC 2175 OpC 06 09 39 +20 29.2   7.0 6.8     ~ 248 3
7 IC 2177 RNe 07 04 25 -10 27.3           ~ 145 2
8 NGC 2467 HII 07 52 18 -26 25.7           ~ 175 1
9 GUM 10 HII 08 16 16.8 -35 37 58           ~ 31 0
10 NGC 2579 OpC 08 20 55.3 -36 13 23           ~ 95 4
11 GUM 15 HII 08 43 52.5 -41 14 39           ~ 31 2
12 RCW 38 SFR 08 59 05.50 -47 30 39.4           ~ 270 2
13 GUM 25 HII 09 02 21.3 -48 41 55           ~ 27 0
14 NGC 3199 HII 10 16 32.8 -57 56 02           ~ 62 1
15 NGC 3372 HII 10 44 19.0 -59 53 21           ~ 900 2
16 BRAN 328A HII 10 56 32.5 -63 00 46           ~ 20 0
17 NGC 3576 HII 11 11 49.8 -61 18 14           ~ 229 2
18 NGC 3603 OpC 11 15 18.6 -61 15 26           ~ 958 1
19 IC 2944 HII 11 38 20.00 -63 22 22.0           ~ 151 0
20 GUM 42 HII 11 38 20.4 -63 22 22           ~ 34 1
21 HD 311999 * 12 50 22.6136011684 -61 35 00.794322286 11.14 11.40 10.77 10.76   OB 38 0
22 M 83 SBG 13 37 00.919 -29 51 56.74 8.85 8.11 7.52 7.21   ~ 2249 2
23 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 2577 2
24 IRAS 15557-5337 IR 15 59 36.64 -53 45 53.3           ~ 19 0
25 GUM 50 HII 15 59 38.2 -53 45 32           ~ 38 1
26 GUM 53 HII 16 40 00.1 -48 51 45           ~ 88 1
27 M 20 OpC 18 02 42 -22 58.3           ~ 397 1
28 M 8 HII 18 03 37 -24 23.2           ~ 556 1
29 M 16 OpC 18 18 48 -13 48.4   6.58 6.0     ~ 944 2

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2011PASP..123...44H and select 'bookmark this link' or equivalent in the popup menu


2020.10.24-02:19:47

© Université de Strasbourg/CNRS

    • Contact