2002A&A...389..953M


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.25CET09:20:25

2002A&A...389..953M - Astronomy and Astrophysics, volume 389, 953-962 (2002/7-3)

Iron abundance in hot hydrogen-deficient central stars and white dwarfs from FUSE, HST, and IUE spectroscopy.

MIKSA S., DEETJEN J.L., DREIZLER S., KRUK J.W., RAUCH T. and WERNER K.

Abstract (from CDS):

We present a first systematic investigation of the iron abundance in very hot (Teff≥50000K) hydrogen-deficient post-AGB stars. Our sample comprises 16 PG 1159 stars and four DO white dwarfs. We use recent FUSE observations as well as HST and IUE archival data to perform spectral analyses with line blanketed NLTE model atmospheres. Iron is not detected in any PG 1159 star. In most cases this is compatible with a solar iron abundance due to limited quality of HST and IUE data, although the tendency to an iron underabundance may be recognized. However, the absence of iron lines in excellent FUSE spectra suggests an underabundance by at least 1dex in two objects (K1-16, NGC 7094). A similar result has been reported recently in the [WC]-PG 1159 transition object Abell 78 (Werner et al., 2002, IAUS, 209, in press). We discuss dust fractionation and s-process neutron-captures as possible origins. We also announce the first identification of sulfur in PG 1159 stars.

Abstract Copyright:

Journal keyword(s): stars: AGB and post-AGB - stars: atmospheres - stars: abundances - stars: evolution - white dwarfs - ultraviolet: stars

Simbad objects: 19

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Number of rows : 19

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 KPD 0005+5106 WD* 00 08 18.1706793307 +51 23 16.594540226 11.80 13.04 13.32 13.53   DOZ1 115 0
2 NGC 40 PN 00 13 01.0170260109 +72 31 19.032886305   11.63 11.46     [WC8] 592 2
3 NGC 246 PN 00 47 03.3420803259 -11 52 18.975106178 10.15 11.52 11.76 12.18   PG1159 454 0
4 PG 0122+200 WD* 01 25 22.5118179721 +20 17 56.963251283   16.2   16.9   DOZ.7 102 0
5 GD 1088 ** 01 32 39.347 -19 21 40.38   15.51 15.77 15.77   PG1159 42 0
6 IRAS F05258-7343 pA? 05 24 35.9812176149 -73 40 40.213765086   16.48     16.64 WC 58 0
7 HS 0704+6153 WD* 07 09 32.4974363571 +61 48 19.452647859   17.3   17.1   PG1159 31 0
8 PG 1034+001 WD* 10 37 03.8005751967 -00 08 19.122434186 11.589 12.863 13.228 13.383 13.587 DO 107 0
9 V* GW Vir WD* 12 01 45.9728868858 -03 45 40.627851273   14.87 15.04     DOQZ1 464 0
10 HZ 21 WD* 12 13 56.2639830406 +32 56 31.359805342 13.125 14.361 14.688 14.837 15.038 DO1 136 0
11 PG 1520+525 PN 15 21 46.5638122905 +52 22 03.868713843   15.56 16.6     PG1159 99 1
12 HD 149499B WD* 16 38 31.199 -57 28 10.70   11.12 11.26     DOZ1 100 0
13 PG 1707+427 WD* 17 08 47.6869967260 +42 41 00.558830272   16.18       PG1159 109 0
14 PN K 1-16 PN 18 21 52.1081781582 +64 21 53.413814961   14.44 14.96 15.26   PG1159 233 0
15 HD 184738 PN 19 34 45.2337512278 +30 30 58.951476338   10.41 10.44     [WC9] 922 0
16 MWP 1 PN 21 17 08.2817539788 +34 12 27.415871206     12.33     PG1159 173 0
17 V* IR Peg WD* 21 34 08.2124719240 +06 50 57.662044329   16.15       PG1159 112 0
18 PN A66 78 PN 21 35 29.3817385380 +31 41 45.450384940   13.04 13.25     [WC5] 303 0
19 V* V409 And WD* 23 27 15.9352164958 +40 01 23.428438900   14.1 15.41     DO 69 0

    Equat.    Gal    SGal    Ecl

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2020.10.25-09:20:25

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