2010A&A...512A..63M


Query : 2010A&A...512A..63M

2010A&A...512A..63M - Astronomy and Astrophysics, volume 512, A63-63 (2010/3-1)

Metal production in M 33: space and time variations.

MAGRINI L., STANGHELLINI L., CORBELLI E., GALLI D. and VILLAVER E.

Abstract (from CDS):

Nearby galaxies are ideal places to study metallicity gradients in detail and their time evolution. We analyse the spatial distribution of metals in M 33 using a new sample and the literature data on H II regions, and constrain a model of galactic chemical evolution with H II region and planetary nebula (PN) abundances. We consider chemical abundances of a new sample of H II regions complemented with previous data sets. We compared H II region and PN abundances obtained with a common set of observations taken at MMT. With an updated theoretical model, we followed the time evolution of the baryonic components and chemical abundances in the disk of M 33, assuming that the galaxy is accreting gas from an external reservoir. From the sample of H II regions, we find that i) the 2D metallicity distribution has an off-centre peak located in the southern arm; ii) the oxygen abundance gradients in the northern and southern sectors, as well as in the nearest and farthest sides, are identical within the uncertainties, with slopes around -0.03-4dex/kpc; iii) bright giant H II regions have a steeper abundance gradient than the other H II regions; iv) H II regions and PNe have O/H gradients very close within the errors; v) our updated evolutionary model is able to reproduce the new observational constraints, as well as the metallicity gradient and its evolution. Supported by a uniform sample of nebular spectroscopic observations, we conclude that i) the metallicity distribution in M 33 is very complex, showing a central depression in metallicity probably due to observational bias; ii) the metallicity gradient in the disk of M 33 has a slope of -0.037±0.009dex/kpc in the whole radial range up to ∼8kpc, and -0.044±0.009dex/kpc excluding the central kpc; iii) there is little evolution in the slope with time from the epoch of PN progenitor formation to the present.

Abstract Copyright:

Journal keyword(s): galaxies: abundances - galaxies: evolution - galaxies: individual: M 33

VizieR on-line data: <Available at CDS (J/A+A/512/A63): table1.dat table2.dat table3.dat>

Nomenclature: Table 1: LGC-HII NN (Nos 14-18) added.

CDS comments: Paragr. 4.3: 8 HII regions BNNNNa not identified.

Simbad objects: 43

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Number of rows : 43
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 BCLMP 275A HII 01 32 29.5 +30 36 08           ~ 2 0
2 [DGG95] 48 SNR 01 32 31.50 +30 35 31.0           ~ 11 0
3 LGC-HII 14 HII 01 32 33.300 +30 32 01.90           ~ 1 0
4 CPSDP 26 HII 01 32 33.8 +30 27 09     11.8     ~ 2 0
5 BCLMP 282 HII 01 32 40 +30 40.6           ~ 2 0
6 LGC-HII 15 HII 01 32 40.800 +30 24 24.99           ~ 1 0
7 BCLMP 264 HII 01 32 41.14 +30 22 27.0     12.9     ~ 5 0
8 [EPR2003] 87 MoC 01 32 42.7 +30 22 26           ~ 4 0
9 LGC-HII 2 HII 01 32 43.0 +30 19 31 18.48 18.93 19.11 19.19 19.29 ~ 5 0
10 LGC-HII 16 HII 01 32 43.500 +30 35 17.29           ~ 1 0
11 BCLMP 238 HII 01 32 44.70 +30 34 58.1     12.2     ~ 8 0
12 NGC 588 HII 01 32 45.2 +30 38 54 14.59 14.40 14.44 14.89 15.16 ~ 117 1
13 LGC-HII 3 GlC 01 32 45.9111117702 +30 41 35.314276458 17.829 19.085 18.479 18.586 18.719 ~ 9 0
14 BCLMP 261 GlC 01 32 54.6010420477 +30 23 20.549485128 16.60 16.59 16.72 16.94 17.931 ~ 10 0
15 BCLMP 239 HII 01 32 56.90 +30 32 54.2           ~ 5 0
16 BCLMP 289 HII 01 32 58.52 +30 44 26.8   19.30 19.70     ~ 7 0
17 BCLMP 218 HII 01 33 00.7 +30 30 51     11.9     ~ 8 0
18 [MA42] 1 HII 01 33 03.4 +30 11 19           ~ 12 0
19 LGC-HII 17 HII 01 33 11.300 +30 39 03.39           ~ 1 0
20 BCLMP 290 HII 01 33 11.4 +30 45 15 14.74 14.71 14.80 14.92 15.08 ~ 8 0
21 IC 131 HII 01 33 15.0 +30 45 09   12.52       ~ 59 0
22 IC 132 HII 01 33 15.8 +30 56 45 15.08 14.87 14.82 15.24 15.43 ~ 45 0
23 BCLMP 623 HII 01 33 15.9 +30 53 02     12.2     ~ 86 0
24 IC 133 HII 01 33 15.9 +30 53 02     12.2     ~ 85 0
25 CPSDP 123 HII 01 33 20.30 +30 32 48.7     15.4     ~ 3 0
26 CPSDP 43A HII 01 33 22.130 +30 26 20.43     13.5     ~ 4 0
27 BCLMP 45 HII 01 33 29.20 +30 40 25.4 15.58 15.55 15.66 15.72 15.97 ~ 18 0
28 NGC 595 HII 01 33 33.53 +30 41 29.8           ~ 194 0
29 M 33 GiG 01 33 50.904 +30 39 35.79 6.17 6.27 5.72     ~ 5382 1
30 BCLMP 694 HII 01 33 52.02 +30 47 16.9           ~ 3 0
31 BCLMP 93A HII 01 33 52.6 +30 39 08           ~ 2 0
32 BCLMP 301H HII 01 33 52.6 +30 45 03           ~ 2 0
33 BCLMP 759 HII 01 33 55 +30 22.2           ~ 4 0
34 MCA 14 WR* 01 33 57.1664337366 +30 35 11.733151522 19.195 20.182 20.393 20.318 20.095 WNL 6 0
35 LGC-HII 18 HII 01 33 58.900 +30 55 31.30           ~ 1 0
36 BCLMP 4 HII 01 33 59.44 +30 35 49.6     14.3     ~ 20 0
37 CPSDP 1A HII 01 33 59.72 +30 34 35.4     13.6     ~ 6 0
38 SNR B013111+30270 SNR 01 34 00.29 +30 42 18.4           ~ 27 0
39 BCLMP 670 HII 01 34 03.3 +30 53 09 18.82 18.93 19.01 18.99 19.30 ~ 6 0
40 VGHC 2-95 PoG 01 34 15.6 +30 37 11 14.69 14.61 14.70 14.85 14.97 ~ 23 0
41 BCLMP 691 HII 01 34 16.64 +30 51 53.7 14.80 14.63 14.66 14.76 14.76 ~ 30 0
42 NGC 604 HII 01 34 32.1 +30 47 01           ~ 565 0
43 BCLMP 745 HII 01 34 37.45 +30 34 54.7 17.20 17.36 17.50 17.47 17.81 ~ 8 0

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2021.12.06-09:38:04

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