CDS

2007A&A...470..865M

Query : 2007A&A...470..865M

2007A&A...470..865M - Astronomy and Astrophysics, volume 470, 865-874 (2007/8-2)

The metallicity gradient of M 33: chemical abundances of HII regions.

MAGRINI L., VILCHEZ J.M., MAMPASO A., CORRADI R.L.M. and LEISY P.

Abstract (from CDS):

We present spectroscopic observations of a sample of 72 emission-line objects, including mainly HII regions, in the spiral galaxy M 33. Spectra were obtained with the multi-object, wide field spectrograph AF2/WYFFOS at the 4.2m WHT telescope. Line intensities, extinction, and electron density were determined for the whole sample of objects. The aim of the present work was to derive chemical and physical parameters of a set of HII regions, and from them the metallicity gradient. Electron temperatures and chemical abundances were derived for the 14 HII regions where both [OII] and [OIII] emission line fluxes were measured, including the electron temperature sensitive emission line [OIII] 436.3nm and in a few cases [NII] 575.5nm. The ionization correction factor (ICF) method was used to derive the total chemical abundances. The presence of abundance gradients was inferred from the radial behaviour of several emission-line ratios, and accurately measured from chemical abundances directly derived in 14 H II regions. The oxygen abundances of our H II regions, located in the radial region from ∼2 to ∼7.2kpc, gave an oxygen gradient -0.054±0.011dex/kpc The overall oxygen gradient for M 33 obtained using ours and previous oxygen determinations in a large number of H II regions with direct electron temperature determination as well as abundance in young stars presented a two slope shape: -0.19dex/kpc for the central regions (R<3kpc), and -0.038dex/kpc for the outer regions (R≥3kpc).

Abstract Copyright: ∼

Journal keyword(s): galaxies: abundances - galaxies: evolution - galaxies: individual: M33 - ISM: abundances - ISM: HII regions

Nomenclature: Table 1: BCLMP NNNA N=16 added. Table 1: LGC-HII NN (Nos 1-13).

CDS comments: Table 1 BCLMP 84 is a misprint for BCLMP 284.

Simbad objects: 92

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Number of rows : 92
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023 		#notes
1 BCLMP 275A HII 01 32 29.5 +30 36 08           ~ 2 0
2 LGC-HII 1 HII 01 32 30.2 +30 32 35           ~ 1 0
3 BCLMP 273B HII 01 32 33.5 +30 30 43           ~ 1 0
4 BCLMP 272 HII 01 32 34.1 +30 27 44     13.4     ~ 5 0
5 BCLMP 266 HII 01 32 40.7525774160 +30 24 24.644711448           ~ 5 0
6 BCLMP 263A HII 01 32 41.8 +30 21 17           ~ 1 0
7 LGC-HII 2 HII 01 32 43.0 +30 19 31 18.48 18.93 19.11 19.19 19.29 ~ 5 0
8 BCLMP 238 HII 01 32 44.70 +30 34 58.1     12.2     ~ 8 0
9 NGC 588 HII 01 32 45.2 +30 38 54 14.59 14.40 14.44 14.89 15.16 ~ 121 1
10 LGC-HII 3 GlC 01 32 45.9154376736 +30 41 35.328611508 17.829 19.085 18.479 18.586 18.719 ~ 10 0
11 BCLMP 240A HII 01 32 56.8 +30 32 16           ~ 1 0
12 BCLMP 289 HII 01 32 58.52 +30 44 26.8   19.30 19.70     ~ 8 0
13 BCLMP 218 HII 01 33 00.7 +30 30 51     11.9     ~ 8 0
14 [MA42] 1 HII 01 33 03.4 +30 11 19           ~ 12 0
15 SNR B013015+30245 SNR 01 33 03.96 +30 39 53.2           ~ 33 0
16 BCLMP 258B HII 01 33 06.2 +30 23 27           ~ 2 0
17 BCLMP 288A HII 01 33 07.3 +30 42 35           ~ 1 0
18 CPSDP 97 HII 01 33 10.28 +30 48 23.7   19.37 19.80     ~ 2 0
19 [MCM2000] Em 24 GlC 01 33 10.7768616072 +30 18 08.483744808 17.67 18.847 18.767 18.39 18.786 ~ 9 0
20 CPSDP 194 HII 01 33 11.1 +30 45 18   15.7 16.1     ~ 7 0
21 BCLMP 220 HII 01 33 11.12 +30 27 39.7     14.8     ~ 10 0
22 BCLMP 290 HII 01 33 11.4 +30 45 15 14.74 14.71 14.80 14.92 15.08 ~ 9 0
23 VGHC 2-22 HII 01 33 12.188 +30 38 47.14           ~ 80 0
24 BCLMP 256C HII 01 33 12.2 +30 23 29           ~ 1 0
25 BCLMP 618B HII 01 33 13.150 +30 50 32.87           ~ 2 0
26 IC 131 HII 01 33 15.0 +30 45 09   12.52       ~ 62 0
27 CPSDP 103 HII 01 33 15.18 +30 51 58.2   18.83 19.93     ~ 5 0
28 BCLMP 638N HII 01 33 15.6 +30 56 49           ~ 4 0
29 IC 132 HII 01 33 15.8 +30 56 45 15.08 14.87 14.82 15.24 15.43 ~ 48 1
30 IC 133 HII 01 33 15.9 +30 53 02     12.2     ~ 86 0
31 BCLMP 623 HII 01 33 15.9 +30 53 02     12.2     ~ 87 0
32 BCLMP 626 HII 01 33 16.24 +30 54 01.7           ~ 9 0
33 CPSDP 107 HII 01 33 18.97 +30 58 14.4   19.04 20.00     ~ 6 0
34 LGC-HII 4 HII 01 33 21.2 +30 17 54           ~ 2 0
35 SNR B013035+30108 SNR 01 33 23.86 +30 26 13.4           ~ 23 0
36 BCLMP 45 HII 01 33 29.20 +30 40 25.4 15.58 15.55 15.66 15.72 15.97 ~ 19 0
37 NGC 595 HII 01 33 33.53 +30 41 29.8           ~ 203 0
38 BCLMP 207A HII 01 33 35.1 +30 29 56           ~ 1 0
39 BCLMP 55B HII 01 33 36.0 +30 42 33           ~ 1 0
40 BCLMP 640 HII 01 33 36.0 +31 01 42     12.4     ~ 6 0
41 [CDL2004] 52 PN 01 33 36.83 +30 38 45.6           ~ 4 0
42 LGC-HII 5 HII 01 33 40.5 +30 10 46           ~ 1 0
43 LGC-HII 6 HII 01 33 47.0 +30 27 23           ~ 2 0
44 CPSDP 221 HII 01 33 48.17 +30 52 08.1   18.74 20.14     ~ 3 0
45 BCLMP 637 HII 01 33 50.6785022472 +30 56 36.775466268 17.16 17.01 17.05 17.52 17.65 ~ 8 0
46 [CH2001b] 33 PN? 01 33 50.88 +30 37 12.3           ~ 5 0
47 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 5725 1
48 BCLMP 93A HII 01 33 52.6 +30 39 08           ~ 2 0
49 BCLMP 301H HII 01 33 52.6 +30 45 03           ~ 2 0
50 BCLMP 759 HII 01 33 55 +30 22.2           ~ 4 0
51 BCLMP 4 HII 01 33 59.44 +30 35 49.6     14.3     ~ 20 0
52 CPSDP 316 HII 01 33 59.51 +30 23 09.6     13.5     ~ 4 0
53 [GDK99] 128 HII 01 33 59.8 +30 32 45 17.61 17.82 17.97 17.83 18.34 ~ 6 1
54 SNR B013111+30270 SNR 01 34 00.29 +30 42 18.4           ~ 27 0
55 [MA42] 3 PoG 01 34 01 +30 52.1           ~ 6 0
56 BCLMP 670 HII 01 34 03.3 +30 53 09 18.82 18.93 19.01 18.99 19.30 ~ 6 0
57 BCLMP 90 HII 01 34 04.15 +30 38 08.2           ~ 12 0
58 LGC-HII 7 HII 01 34 04.3 +31 02 18           ~ 2 0
59 VGHC 2-84 GlC 01 34 06.68 +30 48 56.2 16.506 17.563 17.224 16.807 17.161 ~ 14 0
60 BCLMP 709B HII 01 34 09.4 +30 34 17           ~ 1 0
61 CPSDP 323 HII 01 34 09.5 +30 21 54     13.7     ~ 3 0
62 CPSDP 325 HII 01 34 13.0 +30 27 40     14.2     ~ 3 0
63 VGHC 2-95 PoG 01 34 15.6 +30 37 11 14.69 14.61 14.70 14.85 14.97 ~ 23 0
64 BCLMP 691 HII 01 34 16.64 +30 51 53.7 14.80 14.63 14.66 14.76 14.76 ~ 31 0
65 BCLMP 721 HII 01 34 20.53 +30 37 58.2           ~ 4 0
66 CPSDP 189 HII 01 34 20.82 +30 31 02.8   19.72 20.24     ~ 3 0
67 BCLMP 682C HII 01 34 22.0 +30 47 10           ~ 1 0
68 BCLMP 715B HII 01 34 23.3 +30 33 13           ~ 1 0
69 BCLMP 659 HII 01 34 24.13 +30 57 02.3           ~ 5 0
70 LGC-HII 8 HII 01 34 24.3 +30 39 07           ~ 2 0
71 NGC 604 HII 01 34 32.1 +30 47 01           ~ 582 0
72 [MPH2006] 259 HII 01 34 36.04 +30 34 49.8           ~ 11 0
73 LGC-HII 9 HII 01 34 36.8 +30 58 19           ~ 1 0
74 BCLMP 717B HII 01 34 37.40 +30 34 54.3           ~ 3 0
75 BCLMP 745 HII 01 34 37.45 +30 34 54.7 17.20 17.36 17.50 17.47 17.81 ~ 8 0
76 LGC-HII 10 HII 01 34 38.5 +30 32 52           ~ 2 0
77 BCLMP 749 HII 01 34 38.8 +30 44 03     13.3     ~ 7 0
78 BCLMP 649 HII 01 34 39.18 +31 02 24.8           ~ 5 0
79 BCLMP 705 HII 01 34 40.37 +30 31 19.5           ~ 5 0
80 LGC-HII 11 HII 01 34 42.2 +30 24 00 19.46 19.52 19.55 19.70 20.19 ~ 5 0
81 BCLMP 706 HII 01 34 42.28 +30 31 41.1 17.90 17.81 17.76 17.70 17.94 ~ 7 0
82 [MCM2000] Em 59 EmO 01 34 42.53 +30 55 44.5 19.614 20.734 20.389 19.188 19.604 ~ 7 0
83 BCLMP 757 HII 01 34 44.54 +30 42 37.7           ~ 4 0
84 BCLMP 657 HII 01 34 50.0 +30 54 50     13.9     ~ 5 0
85 LGC-HII 12 HII 01 34 55.07 +30 34 51.1           ~ 3 0
86 BCLMP 754 HII 01 35 01 +30 40.0           ~ 3 0
87 LGC-HII 13 HII 01 35 02.3606427216 +31 00 42.553805292           ~ 4 0
88 BCLMP 756 HII 01 35 06.97 +30 41 47.7     12.3     ~ 7 0
89 NGC 2403 AGN 07 36 51.3381434280 +65 36 09.650825640 9.31 8.84 8.38 8.19   ~ 1755 1
90 BD+25 4655 HS* 21 59 41.9748629928 +26 25 57.403455672 8.27 9.39 9.68     sdO6 118 0
91 BCLMP 310H HII ~ ~           ~ 1 0
92 BCLMP 273A HII ~ ~           ~ 1 0

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2023.09.30-19:03:57

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