2010A&A...517A..95P


Query : 2010A&A...517A..95P

2010A&A...517A..95P - Astronomy and Astrophysics, volume 517, A95-95 (2010/7-1)

Planetary nebulae abundances and stellar evolution. II.

POTTASCH S.R. and BERNARD-SALAS J.

Abstract (from CDS):

In recent years mid- and far infrared spectra of planetary nebulae have been analysed and lead to more accurate abundances. It may be expected that these better abundances lead to a better understanding of the evolution of these objects. The observed abundances in planetary nebulae are compared to those predicted by the models of Karakas (2003, Thesis, Monash Univ. Melbourne) in order to predict the progenitor masses of the various PNe used. The morphology of the PNe is included in the comparison. Since the central stars play an important role in the evolution, it is expected that this comparison will yield additional information about them. First the nitrogen/oxygen ratio is discussed with relation to the helium/hydrogen ratio. The progenitor mass for each PNe can be found by a comparison with the models of Karakas. Then the present luminosity of the central stars is determined in two ways: first by computing the central star effective temperature and radius, and second by computing the nebular luminosity from the hydrogen and helium lines. This luminosity is also a function of the initial mass so that these two values of initial mass can be compared. Six of the seven bipolar nebulae can be identified as descendants of high mass stars (4-6M) while the seventh is ambiguous. Most of the elliptical PNe have central stars which descend from low initial mass stars, although there are a few caveats which are discussed. There is no observational evidence for a higher mass for central stars which have a high carbon/oxygen ratio. The evidence provided by the abundance comparison with the models of Karakas is consistent with the HR diagram to which it is compared. In the course of this discussion it is shown how ``optically thin'' nebulae can be separated from those which are ``optically thick''.

Abstract Copyright:

Journal keyword(s): stars: abundances - planetary nebulae: general - infrared: ISM - stars: early-type - galaxies: abundances

Simbad objects: 36

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Number of rows : 36
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 NGC 40 PN 00 13 01.0170097248 +72 31 19.033338720   11.63 11.46     [WC8] 617 2
2 IC 40 GiG 00 39 21.4250874312 +02 27 22.359006324   15.1       ~ 20 0
3 NGC 1535 PN 04 14 15.7689913368 -12 44 21.932484324   12.01 12.82     sdO3: 512 0
4 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17478 0
5 IC 418 PN 05 27 28.2059533560 -12 41 50.282287764   9.405 9.010 10.118   O7fp 1031 2
6 NGC 2022 PN 05 42 06.1904253312 +09 05 10.585995576   14.9 14.2     [WC] 362 0
7 IC 2165 PN 06 21 42.7847803566 -12 59 14.040997076   12.146 10.782 12.305   ~ 375 0
8 NGC 2392 PN 07 29 10.7671398096 +20 54 42.474888072     9.68     O6f 723 1
9 NGC 2440 PN 07 41 55.4 -18 12 32   11.469 10.104     ~ 653 2
10 IC 2448 PN 09 07 06.3191779848 -69 56 30.692677668   11.1 11.10     O(H)3III-V 232 0
11 NGC 2792 PN 09 12 26.561 -42 25 38.92     11.8     ~ 177 0
12 NGC 3242 PN 10 24 46.1335521792 -18 38 32.296857792   11.83 12.15     ~ 820 1
13 IC 4191 PN 13 08 47.3071977936 -67 38 37.542860628   10.32 11.61     ~ 138 0
14 NGC 5315 PN 13 53 56.9726795664 -66 30 50.859483264   14.58 14.40     [WO4] 309 0
15 WRAY 16-156 PN 14 33 17.97 -60 49 36.3   16.3 16.7   15.38 ~ 163 0
16 NGC 5882 PN 15 16 49.9562553264 -45 38 58.616280132   11.9 10.9     ~ 274 0
17 PN Me 2-1 PN 15 22 19.2811793544 -23 37 31.412401104   12.2 12.20     ~ 216 0
18 PN Mz 3 PN 16 17 13.3915382496 -51 59 10.711893480   10.8 14.00     O9.5 349 0
19 NGC 6153 PN 16 31 30.5708444544 -40 15 12.646208700   10.7 15.55     ~ 303 0
20 NGC 6210 PN 16 44 29.5191019368 +23 47 59.421958296   12.3 11.7     Of/[WR] 587 0
21 NGC 6302 PN 17 13 44.5 -37 06 11           O-rich 797 1
22 NGC 6369 PN 17 29 20.4566510904 -23 45 34.771819248   16.6 12.00     [WC4] 318 0
23 PN Hb 5 PN 17 47 56.20 -29 59 39.6   10.50 10.78     ~ 266 0
24 NGC 6445 PN 17 49 15.0282384611 -20 00 34.159640072   18.9       ~ 293 0
25 NGC 6543 PN 17 58 33.4039587288 +66 37 58.750734000   11.09 11.28     [WC] 1170 1
26 NGC 6537 PN 18 05 13.104 -19 50 34.88     13.58     ~ 426 1
27 PN M 1-42 PN 18 11 04.99 -28 58 59.1   13.1 14.00     ~ 207 0
28 NGC 6741 PN 19 02 37.10 -00 26 56.7     9.6     ~ 346 0
29 HD 184738 PN 19 34 45.2337620448 +30 30 58.950651240   10.41 10.44     [WC9] 952 0
30 NGC 6818 PN 19 43 58.022 -14 09 13.44     9.3     ~ 346 1
31 NGC 6826 PN 19 44 48.1500225888 +50 31 30.249034932   9.779 9.359 10.775   O3f(H) 719 0
32 NGC 6886 PN 20 12 42.83016 +19 59 22.6320   13.053 11.719     ~ 320 1
33 NGC 7027 PN 21 07 01.571952 +42 14 10.47120   10.358 8.831 10.157   ~ 2462 1
34 PN Hu 1-2 PN 21 33 08.3106242400 +39 38 09.554428752     12.0     ~ 286 1
35 NGC 7293 PN 22 29 38.5454047152 -20 50 13.747242408 11.894 13.158 13.524 13.689 13.898 DAO.5 943 0
36 NGC 7662 PN 23 25 53.8318792825 +42 32 05.835828380       11.427   ~ 926 0

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