2013MNRAS.429.1450E

Query : 2013MNRAS.429.1450E

2013MNRAS.429.1450E - Mon. Not. R. Astron. Soc., 429, 1450-1465 (2013/February-3)

Emission spectrum of ionized gas in the irregular galaxy Holmberg II.

EGOROV O.V., LOZINSKAYA T.A. and MOISEEV A.V.

Abstract (from CDS):

We studied the ionized gas spectra of star-forming regions in the Holmberg II galaxy using optical long-slit spectroscopic observations made with the 6-m telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences (SAO RAS). We estimated the oxygen, nitrogen, sulphur, neon and argon abundances in individual H ii regions and found the average metallicity in the galaxy to be Z ≃ 0.1 or 0.3Z☉, depending on the estimation method employed. We used these observations combined with the results of our earlier studies of the irregular galaxy IC 10 and the blue compact dwarf galaxy VII Zw 403 to compare the currently most popular methods of gas metallicity estimation in order to select from among them the techniques that are most reliable for analysing irregular galaxies. To this end, we used the `direct' Te method and six empirical and theoretical methods. The results of our observations mostly confirmed the conclusions of López-Sánchez et al. based on the analysis of systematic deviations of metallicity estimates derived by applying different methods to `model' H ii regions.

Abstract Copyright: © 2012 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2012)

Journal keyword(s): techniques: spectroscopic - ISM: abundances - H ii regions - galaxies: individual: Holmberg II - galaxies: ISM - galaxies: irregular

Simbad objects: 40

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Number of rows : 40
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 IC 10 rG 00 20 17.33520 +59 18 13.6480   13.6 9.5     ~ 1185 1
2 [BGR2000] Br 1 HII 00 20 17.4 +59 18 40           ~ 15 0
3 [BGR2000] Br 2 SNR 00 20 19.12 +59 18 53.5           ~ 12 0
4 [BGR2000] Br 4 HII 00 20 25.5 +59 17 47           ~ 8 0
5 [HL90] 111b HII 00 20 26.0 +59 17 42           ~ 9 0
6 [HL90] 111c HII 00 20 26.3 +59 17 57           ~ 16 0
7 [HL90] 111e HII 00 20 26.7 +59 17 52           ~ 8 0
8 [HL90] 111 HII 00 20 27.0 +59 17 29           ~ 18 1
9 [HL90] 111d HII 00 20 27.2 +59 17 53           ~ 12 0
10 HK Ho II 21 HII 08 18 50.45 +70 44 49.7           ~ 9 0
11 HK Ho II 18 HII 08 18 55.0 +70 42 54           ~ 8 0
12 HK Ho II 19 HII 08 18 55.0 +70 43 11           ~ 5 0
13 HK Ho II 17 HII 08 18 55.3 +70 42 59           ~ 6 0
14 HK Ho II 16 HII 08 18 56.4 +70 42 39           ~ 7 0
15 HK Ho II 15 HII 08 19 00.3 +70 42 13           ~ 3 0
16 HSK 25 HII 08 19 00.4 +70 43 08           ~ 6 0
17 HK Ho II 14 HII 08 19 03.7 +70 42 59           ~ 5 0
18 UGC 4305 IG 08 19 04.9864630512 +70 43 13.086910452 12.06 11.72 11.39 11.11   ~ 812 2
19 HSK 32 HII 08 19 05.0 +70 43 35           ~ 2 0
20 HK Ho II 13 HII 08 19 09.96 +70 43 17.9           ~ 5 0
21 HK Ho II 11 HII 08 19 13.3 +70 43 08           ~ 11 0
22 HK Ho II 9 HII 08 19 17.1 +70 43 41           ~ 3 0
23 HSK 56 HII 08 19 20.9 +70 43 01     12.37     ~ 5 0
24 HSK 57 HII 08 19 21.0 +70 41 56           ~ 3 0
25 [ZEH2003] RX J0819.4+7042 3 HII 08 19 23.6 +70 41 55   16.7       ~ 6 0
26 HSK 59 HII 08 19 23.8 +70 42 59           ~ 6 0
27 HSK 65 HII 08 19 26.0 +70 41 53           ~ 3 0
28 [ZEH2003] RX J0819.4+7042 4 HII 08 19 27.0 +70 41 57   15.6       ~ 11 0
29 [CVL2009] UGC 4305-2 HII 08 19 27.77 +70 42 07.9   17.4       ~ 7 0
30 [CVL2009] UGC 4305-3 HII 08 19 28.88 +70 42 19.5   13.4   12.9   ~ 16 0
31 [SST2011] J081929.00+704219.3 ULX 08 19 28.99 +70 42 19.4           ~ 213 2
32 [ZEH2003] RX J0819.4+7042 12 HII 08 19 29.0 +70 42 47   19.1       ~ 9 0
33 HK Ho II 2 HII 08 19 29.0 +70 43 01           ~ 9 0
34 [ZEH2003] RX J0819.4+7042 10 HII 08 19 30.20 +70 42 40.5   19.1       ~ 7 0
35 HSK 82 HII 08 19 35.5 +70 44 23           ~ 2 0
36 AG+81 266 HS* 09 21 19.1766306264 +81 43 27.630508800 10.392 11.59 11.95 12.09 12.281 sdO 75 0
37 NAME M 81-82 Group GrG 09 55 +69.1           ~ 758 0
38 Feige 34 HS* 10 39 36.7358839104 +43 06 09.212615280 9.613 10.91 11.14 11.319 11.464 sdOp 731 0
39 Z 351-62 bCG 11 27 59.90 +78 59 39.0   14.50       ~ 346 1
40 HZ 44 HS* 13 23 35.2629445608 +36 07 59.544140304 10.186 11.42 11.65 12.00 11.995 sdBN0VIIHe28 439 0

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