2018MNRAS.477..904X


Query : 2018MNRAS.477..904X

2018MNRAS.477..904X - Mon. Not. R. Astron. Soc., 477, 904-934 (2018/June-2)

Emission-line diagnostics of nearby H II regions including interacting binary populations.

XIAO L., STANWAY E.R. and ELDRIDGE J.J.

Abstract (from CDS):

We present numerical models of the nebular emission from H II regions around young stellar populations over a range of compositions and ages. The synthetic stellar populations include both single stars and interacting binary stars. We compare these models to the observed emission lines of 254 H II regions of 13 nearby spiral galaxies and 21 dwarf galaxies drawn from archival data. The models are created using the combination of the BPASS (Binary Population and Spectral Synthesis) code with the photoionization code CLOUDY to study the differences caused by the inclusion of interacting binary stars in the stellar population. We obtain agreement with the observed emission line ratios from the nearby star-forming regions and discuss the effect of binary-star evolution pathways on the nebular ionization of H II regions. We find that at population ages above 10 Myr, single-star models rapidly decrease in flux and ionization strength, while binary-star models still produce strong flux and high [ O III]/H β ratios. Our models can reproduce the metallicity of H II regions from spiral galaxies, but we find higher metallicities than previously estimated for the H II regions from dwarf galaxies. Comparing the equivalent width of H β emission between models and observations, we find that accounting for ionizing photon leakage can affect age estimates for H II regions. When it is included, the typical age derived for H II regions is 5 Myr from single-star models, and up to 10 Myr with binary-star models. This is due to the existence of binary-star evolution pathways, which produce more hot Wolf-Rayet and helium stars at older ages. For future reference, we calculate new BPASS binary maximal starburst lines as a function of metallicity, and for the total model population, and present these in Appendix A.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): binaries: general - H ii regions - galaxies: general

Simbad objects: 34

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Number of rows : 34
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 UGC 12894 G 00 00 22.55 +39 29 43.5   17       ~ 34 0
2 UGC 290 G 00 29 08.37 +15 53 56.8   18       ~ 46 0
3 UGC 685 G 01 07 22.55 +16 41 03.1 15.01 14.55 14.07     ~ 126 0
4 UGC 1104 G 01 32 42.5190557016 +18 19 01.514434548 15.03 14.56 14.13 13.89   ~ 86 0
5 M 74 G 01 36 41.7451236624 +15 47 01.107512304 10.52 10.00 9.46 9.16   ~ 1562 1
6 UGC 1175 G 01 39 56.64 +11 05 48.5   17       ~ 27 0
7 UGC 1281 LSB 01 49 31.71 +32 35 16.2   13.0       ~ 152 0
8 LEDA 166065 G 02 00 10.2 +28 49 53   17.2       ~ 55 0
9 NGC 925 H2G 02 27 16.913 +33 34 43.97   10.69 10.12 9.55   ~ 734 1
10 UGC 2023 GiG 02 33 18.12 +33 29 25.5   14.9   13.59   ~ 81 0
11 M 77 GiP 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4337 2
12 NGC 1232 EmG 03 09 45.514 -20 34 45.48   10.67 9.87 9.53 10.2 ~ 278 0
13 NGC 1637 AGN 04 41 28.1926876152 -02 51 28.667815488   11.4   11.0 11.3 ~ 394 0
14 UGC 3647 G 07 04 50.94 +56 31 13.8   16.0       ~ 35 0
15 UGC 3672 G 07 06 27.336 +30 19 23.61   17       ~ 37 0
16 NGC 2403 AGN 07 36 51.3381434280 +65 36 09.650825640 9.31 8.84 8.38 8.19   ~ 1697 1
17 UGC 4117 G 07 57 25.948 +35 56 22.05   15.5       ~ 29 0
18 UGC 4483 GiG 08 37 03.29 +69 46 29.2 15.70 15.46 14.98 14.89   ~ 282 0
19 NGC 2805 GiP 09 20 20.3891233968 +64 06 10.716485004   11.9       ~ 201 1
20 IC 2458 GiP 09 21 30.1318400448 +64 14 19.768079076   14.9       ~ 79 0
21 NGC 2820 GiP 09 21 45.564 +64 15 28.87   13.1       ~ 153 0
22 NGC 2905 H2G 09 32 10.111 +21 30 02.99 10.44 9.75 9.07 8.68   ~ 1053 3
23 MCG+00-25-010 Sy1 09 44 01.8742171440 -00 38 31.993352700   15.5       ~ 52 0
24 UGC 5288 PaG 09 51 17.241 +07 49 32.05 15.07 14.65 14.18 13.99   ~ 81 0
25 NGC 3180 GiG 10 18 16.985 +41 25 27.77   10.4       ~ 671 0
26 NGC 4395 Sy2 12 25 48.8633109888 +33 32 48.700168152 10.84 10.54 10.11 9.98   ~ 1075 1
27 NAME CVn I dwA GiC 12 38 40.1 +32 45 59 16.91 16.66 16.73 16.62   ~ 212 0
28 UGC 8651 G 13 39 53.75 +40 44 25.3 15.37 14.56 14.20 14.10   ~ 143 0
29 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 2714 2
30 UGC 9240 G 14 24 43.0755746952 +44 31 31.759938264 14.24 13.54 13.17 13.07   ~ 189 0
31 UGC 9992 G 15 41 48.01 +67 15 14.0 15.71 15.22 14.81 14.44   ~ 76 0
32 UGC 10445 SBG 16 33 47.1783414768 +28 59 01.521191184   13.30 13.96     ~ 126 1
33 NGC 7077 G 21 29 59.634 +02 24 51.75 14.05 14.25 13.67 13.23 12.86 ~ 99 0
34 UGC 12713 G 23 38 14.758 +30 42 33.24   15.1       ~ 53 0

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2022.07.06-19:14:18

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