2002ApJ...568..679W

Query : 2002ApJ...568..679W

2002ApJ...568..679W - Astrophys. J., 568, 679-688 (2002/April-1)

Neon abundances in the H II regions of M33.

WILLNER S.P. and NELSON-PATEL K.

Abstract (from CDS):

We present neon abundances for 25 H II regions of M33, measured from line profiles of the mid-infrared transitions of [Ne II] and [Ne III] taken with the Infrared Space Observatory Short-Wavelength Spectrometer. The distribution of neon abundances as a function of galactocentric radius is best described as a step, -0.15 dex relative to the solar neon abundance from 0.7 to 4.0 kpc and -0.35 dex from 4.0 to 6.7 kpc, with estimated intrinsic scatter of 0.07 dex. The nearly flat neon abundance distribution differs from the steep oxygen abundance gradient found by previous investigators. Unless the oxygen abundance determinations are wrong, the chemical evolution of the galaxy has been radially dependent.

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Journal keyword(s): Galaxies: Abundances - Galaxies: Individual: Messier Number: M33 - ISM: H II Regions - Infrared: Galaxies

Nomenclature: Table 1: BCLMP NNNA (Nos 680B, 680C) added, BCLMP NNNW (Nos 87E, 88W, 740W, 638E, 638N) added.

Simbad objects: 33

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Number of rows : 33
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 NGC 588 HII 01 32 45.2 +30 38 54 14.59 14.40 14.44 14.89 15.16 ~ 126 1
2 BCLMP 221 GlC 01 33 09.930 +30 27 23.54 14.38 14.29 14.32 14.27 13.97 ~ 11 0
3 CPSDP 194 HII 01 33 11.1 +30 45 18   15.7 16.1     ~ 7 0
4 BCLMP 638N HII 01 33 15.6 +30 56 49           ~ 4 0
5 IC 132 HII 01 33 15.8 +30 56 45 15.08 14.87 14.82 15.24 15.43 ~ 49 1
6 BCLMP 623 HII 01 33 15.9 +30 53 02     12.2     ~ 87 0
7 IC 133 HII 01 33 15.9 +30 53 02     12.2     ~ 88 0
8 BCLMP 638E HII 01 33 16.3 +30 56 44           ~ 3 0
9 VGHC 2-33 HII 01 33 29.1 +30 31 47           ~ 13 0
10 BCLMP 45 HII 01 33 29.20 +30 40 25.4 15.58 15.55 15.66 15.72 15.97 ~ 19 0
11 NGC 595 HII 01 33 33.53 +30 41 29.8           ~ 213 0
12 VGHC 1-13 HII 01 33 35.8 +30 39 44           ~ 8 0
13 BCLMP 251 HII 01 33 37.80 +30 20 09.7     16.1     ~ 10 0
14 BCLMP 62 HII 01 33 44.8 +30 44 47     11.2     ~ 8 0
15 BCLMP 27 HII 01 33 45.58 +30 36 48.6     15.2     ~ 12 0
16 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
17 BCLMP 93 HII 01 33 52.3 +30 39 18     13.4     ~ 17 0
18 IC 142 HII 01 33 55.1 +30 45 22   11.30 14.2     ~ 40 0
19 BCLMP 4 HII 01 33 59.44 +30 35 49.6     14.3     ~ 20 0
20 VGHC 2-77 HII 01 34 00.19 +30 40 50.0     15.4     ~ 18 0
21 BCLMP 87 HII 01 34 02.32 +30 38 40.2     14.4     ~ 12 0
22 BCLMP 87E HII 01 34 02.5 +30 38 41           ~ 5 0
23 BCLMP 302 HII 01 34 06.85 +30 47 27.6     14.4     ~ 30 0
24 BCLMP 702 SNR 01 34 09 +30 32.0           ~ 8 0
25 BCLMP 95 HII 01 34 10.9 +30 36 18     14.5     ~ 15 0
26 BCLMP 710 Cl? 01 34 13.666 +30 33 43.35 15.67 15.75 15.90 15.94 16.22 ~ 23 0
27 BCLMP 88W HII 01 34 15.5 +30 37 12           ~ 6 0
28 VGHC 2-95 PoG 01 34 15.6 +30 37 11 14.69 14.61 14.70 14.85 14.97 ~ 23 0
29 BCLMP 691 HII 01 34 16.64 +30 51 53.7 14.80 14.63 14.66 14.76 14.76 ~ 31 0
30 BCLMP 680C HII 01 34 32.1 +30 47 00           ~ 3 0
31 BCLMP 680B HII 01 34 33.5 +30 46 50           ~ 3 0
32 BCLMP 740W HII 01 34 39.6 +30 41 52           ~ 4 0
33 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 3138 2

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