2004A&A...426..779M


Query : 2004A&A...426..779M

2004A&A...426..779M - Astronomy and Astrophysics, volume 426, 779-786 (2004/11-2)

Chemical abundances of planetary nebulae in M33.

MAGRINI L., PERINOTTO M., MAMPASO A. and CORRADI R.L.M.

Abstract (from CDS):

Using spectroscopic data presented in Magrini et al. (2003A&A...400..511M), we have analyzed with the photoionization code CLOUDY 94.00 (Ferland et al., 1998PASP..110..761F) 11 Planetary Nebulae belonging to the spiral galaxy M 33. Central star temperatures and nebular parameters have been determined. In particular the chemical abundances of He/H, O/H, N/H, Ar/H, and S/H have been measured and compared with values obtained via the Ionization Correction Factors (ICF) method, when available. Chemical abundance relationships have been investigated; in particular, a correlation between N/H and N/O similar to the Galactic one (Henry, 1990ApJ...356..229H), and a feeble anti-correlation between O/H and N/O have been found. A gradient in O/H across the disc of M 33 is consistent with the one found from H II regions in this galaxy (Vilchez et al., 1988MNRAS.235..633V). Further studies in the outer parts of M 33 are however needed to ascertain this point. The present result shows that oxygen and helium abundances (with lower accuracy also nitrogen, argon and sulphur) can be actually estimated from the brightest PNe of a galaxy, even if the electron temperature cannot be measured. We also found that the oxygen abundance is quite independent of the absolute magnitude of the PN and consequently the brightest PNe are representative of the whole PN population. This represents an important tool for measuring the metallicity of galaxies at the time of the formation of PNe progenitors.

Abstract Copyright:

Journal keyword(s): ISM: planetary nebulae: individual: M 33 - galaxies: individual: M 33 - galaxies: abundances - Local Group

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 IC 10 G 00 20 23.16 +59 17 34.7   13.6 9.5     ~ 1060 0
2 NGC 185 Sy2 00 38 57.9400026024 +48 20 15.035874648   9.10 9.2     ~ 766 1
3 M 110 GiG 00 40 22.0572349992 +41 41 07.507220136   8.92 8.07     ~ 1266 1
4 M 32 IG 00 42 41.825 +40 51 54.61 9.51 9.03 8.08     ~ 2088 2
5 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11785 1
6 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 10188 1
7 [MCM2000] PN 8 PN 01 32 48.66 +30 25 53.2           ~ 7 0
8 [CDL2004] 18 PN 01 33 06.11 +30 31 04.5           ~ 9 0
9 [CDL2004] 29 PN 01 33 19.25 +30 29 40.2           ~ 8 0
10 [CDL2004] 65 PN 01 33 46.45 +30 26 55.4           ~ 7 0
11 [CDL2004] 70 PN 01 33 49.41 +30 32 06.6           ~ 9 0
12 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 5484 1
13 [CDL2004] 88 PN 01 34 01.12 +30 50 27.3           ~ 8 0
14 [CDL2004] 109 PN 01 34 13.98 +30 22 36.5           ~ 8 0
15 [CDL2004] 113 PN 01 34 15.48 +30 32 20.3           ~ 9 0
16 [CDL2004] 115 PN 01 34 15.88 +30 24 54.5           ~ 8 0
17 [CDL2004] 125 PN 01 34 24.26 +30 27 54.4           ~ 8 0
18 [CDL2004] 135 PN 01 34 32.84 +30 41 10.6           ~ 8 0
19 NAME Fornax Dwarf Spheroidal G 02 39 59.3 -34 26 57   9.02 7.4     ~ 1610 1
20 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15982 1
21 PN M 1-8 PN 06 53 33.795 +03 08 26.96   11.7       ~ 98 0
22 PN M 3-1 PN 07 02 49.9034289668 -31 35 29.173259232   12.9 12.70     ~ 121 0
23 NGC 2438 PN 07 41 50.5194253896 -14 44 07.470144744           ~ 280 3
24 PN M 3-5 PN 08 02 28.956 -27 41 55.00     14.40     ~ 84 0
25 NGC 2867 PN 09 21 25.3832468160 -58 18 40.626683604   12.0 10.30     [WO2] 295 0
26 NAME Leo A G 09 59 26.46 +30 44 47.0 14.08 13.54 13.26 13.33   ~ 580 0
27 NAME Sextans B H2G 10 00 00.8217342072 +05 20 09.533389560 12.77 12.25 11.89 11.71   ~ 502 0
28 NGC 3195 PN 10 09 20.910 -80 51 30.73           ~ 112 0
29 NAME Sex A H2G 10 11 00.5 -04 41 30 12.48 12.13 11.93 11.78   ~ 690 2
30 NAME Centaurus A Sy2 13 25 27.6039817176 -43 01 09.493008456   8.18 6.84 6.66   ~ 4228 3
31 NGC 5852 LIN 15 06 56.4128489040 +12 50 48.655266288   14.7       ~ 42 0
32 NAME SDG G 18 55 03.1 -30 28 42   4.5 3.6     ~ 1945 2
33 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1496 0
34 NGC 7009 PN 21 04 10.8155187648 -11 21 48.580157556   12.48 12.07     ~ 979 1

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2022.05.19-00:07:47

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