2011ApJ...733L..50R

Query : 2011ApJ...733L..50R

2011ApJ...733L..50R - Astrophys. J., 733, L50 (2011/June-1)

The oxygen abundance in the solar neighborhood.

RODRIGUEZ M. and DELGADO-INGLADA G.

Abstract (from CDS):

We present a homogeneous analysis of the oxygen abundance in five H II regions and eight planetary nebulae (PNe) located at distances lower than 2 kpc and with available spectra of high quality. We find that both the collisionally excited lines (CELs) and recombination lines imply that the PNe are overabundant in oxygen by about 0.2 dex. An explanation that reconciles the oxygen abundances derived with CELs for H II regions and PNe with the values found for B stars, the Sun, and the diffuse interstellar medium (ISM) requires the presence in H II regions of an organic refractory dust component that is not present in PNe. This dust component has already been invoked to explain the depletion of oxygen in molecular clouds and in the diffuse ISM.

Abstract Copyright: ∼

Journal keyword(s): dust, extinction - H II regions - ISM: abundances - planetary nebulae: general

Simbad objects: 14

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Number of rows : 14
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 1501 PN 04 06 59.3920909320 +60 55 14.278542024   15.17 13.0     [WO4] 314 1
2 IC 418 PN 05 27 28.2059533560 -12 41 50.282287764   9.405 9.010 10.118   O7fp 1059 2
3 M 42 HII 05 35 16.8 -05 23 15           ~ 4411 0
4 NGC 3132 PN 10 07 01.7656422504 -40 26 11.130553032   10.14 10.01     A2V 423 1
5 NGC 3242 PN 10 24 46.1335521792 -18 38 32.296857792   11.83 12.15     ~ 838 1
6 NGC 6210 PN 16 44 29.5191019368 +23 47 59.421958296   12.3 11.7     Of/[WR] 597 0
7 NGC 6543 PN 17 58 33.4039587288 +66 37 58.750734000   11.09 11.28     [WC] 1197 2
8 M 20 OpC 18 02 42 -22 58.3           ~ 456 1
9 M 8 OpC 18 03 37 -24 23.2           ~ 644 1
10 NGC 6572 PN 18 12 06.3181909152 +06 51 13.027935240   9.3 10.8     [WC] 761 0
11 M 16 OpC 18 18 45.1 -13 47 31           ~ 1084 1
12 NGC 6618 OpC 18 20 47 -16 10.3           ~ 1700 0
13 M 57 PN 18 53 35.0967659112 +33 01 44.883287544   15.405 15.769 15.901 16.062 DA(O?) 868 2
14 NGC 6884 PN 20 10 23.6424784416 +46 27 39.631794408   11.9 10.9     ~ 322 1

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