1998A&A...338..651R

Query : 1998A&A...338..651R

1998A&A...338..651R - Astronomy and Astrophysics, volume 338, 651-660 (1998/10-2)

Spectral analysis of O(He)-type post-AGB stars.

RAUCH T., DREIZLER S. and WOLFF B.

Abstract (from CDS):

We present an analysis of two recently discovered, very hot hydrogen-deficient post-AGB stars of spectral type O(He), namely HS 1522+6615 and HS 2209+8229, by means of state-of-the-art NLTE model atmospheres based on new optical, UV, and X-ray observations. In the spectra of HS 1522+6615 we discovered a variability of the O Rco λ#3Å line complex on a time scale of few days. We also report on the discovery of a ring structure in the planetary nebula K1-27 which has an O(He)-type central star. We discuss how the group of O(He) stars fits in our picture of hydrogen-deficient post-AGB stellar evolution.

Abstract Copyright: ∼

Journal keyword(s): stars: abundances - stars: evolution - stars: individual: HS 1522+6615 - stars: individual: HS 2209+8229 - stars: AGB and post-AGB - planetary nebulae: individual: K1-27

CDS comments: KS 292 = Hbg 292

Simbad objects: 41

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Number of rows : 41
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 KPD 0005+5106 WD* 00 08 18.1703149584 +51 23 16.598370912 11.80 13.04 13.32 13.53   DOZ1 120 0
2 NGC 246 PN 00 47 03.3420341616 -11 52 18.971126076 10.15 11.52 11.76 12.18   PG1159 475 0
3 RX J0122.9-7521 WD* 01 22 53.4122561952 -75 21 14.724358308     15.4     PG1159 43 0
4 PG 0122+200 WD* 01 25 22.5121704552 +20 17 56.963079924   16.2   16.9   DOZ.7 112 0
5 GD 1088 WD* 01 32 39.347 -19 21 40.38   15.51 15.77 15.77   PG1159 47 0
6 M 76 PN 01 42 19.6557728208 +51 34 31.534970052     17.48   17.69 DOZ 374 2
7 PN IsWe 1 PN 03 49 05.9053580088 +50 00 14.898517992 15.71 16.374 16.523 16.576 16.644 DOZ 63 1
8 HS 0444+0453 WD* 04 47 04.5045887496 +04 58 41.340500616   15.9   16.1   DQZO.5 26 0
9 PN K 1-27 PN 05 57 02.1748457640 -75 40 22.478040120     16.04 16.27 16.41 sdOHe 87 0
10 HS 0704+6153 WD* 07 09 32.4965901360 +61 48 19.458822312   17.3   17.1   PG1159 40 0
11 WRAY 17-1 PN 07 14 49.4240697984 -46 57 39.199063500   13.8 13.00     PG1159 83 0
12 PN A66 21 PN 07 29 02.7096654192 +13 14 48.587555184   15.67 15.99     DOZ 191 0
13 PN ARO 121 PN 07 57 51.6169237320 +53 25 16.950484848   16.775 17.128 17.288 17.501 DQ 162 1
14 PN A66 30 PN 08 46 53.4639874872 +17 52 46.369394580   14.23 14.30 13.47   [WC5] 411 0
15 CD-45 5058 HS* 09 20 10.1317907208 -45 31 54.942917700 9.81 11.03 11.33 11.62   sdO 58 0
16 PN Lo 4 PN 10 05 45.7880109408 -44 21 33.523482384           sdO 139 1
17 PG 1034+001 HS* 10 37 03.8002625256 -00 08 19.118365188 11.589 12.863 13.228 13.383 13.587 sdB/sdO 122 0
18 PG 1144+005 WD* 11 46 35.2284791112 +00 12 33.539992056   14.922 15.233     PG1159 89 0
19 PN LoTr 4 PN 11 52 29.2564204824 -42 17 38.943700548           O(He) 56 0
20 PG 1151-029 WD* 11 54 15.0623712576 -03 12 05.135581440   16.07       DOZ1 33 0
21 V* GW Vir WD* 12 01 45.9731868264 -03 45 40.628670300   14.87 15.04     DOQZ1 490 0
22 CD-46 8926 HS* 13 53 08.2139106408 -46 43 42.314548008   11.04 11.30     sdO 46 0
23 PG 1424+535 WD* 14 25 55.4615842224 +53 15 25.138507140   15.412 15.963     PG1159 75 0
24 PG 1501+664 WD* 15 02 09.6299323152 +66 12 19.148868324   16.07 16.37     DZQ1 158 0
25 HS 1517+7403 WD* 15 16 46.4260387056 +73 52 06.953282400   16.4   16.9   DO 41 0
26 PG 1520+525 PN 15 21 46.5635130432 +52 22 03.867341340   15.56 16.6     PG1159 111 1
27 HS 1522+6615 WD* 15 22 56.6956117920 +66 04 42.031760016   16.4       DO 25 0
28 LSE 259 HS* 16 53 54.5759529408 -56 01 54.753819672       12.707   sdO 34 1
29 PG 1707+427 WD* 17 08 47.6869215528 +42 41 00.558430656           PG1159 116 0
30 PN A66 43 PN 17 53 32.2767758208 +10 37 24.210757560   14.53 14.71     O7fk 136 0
31 PN K 1-16 PN 18 21 52.1086837968 +64 21 53.406292104   14.44 14.96 15.26   PG1159 250 0
32 SH 2-68 PN 18 24 58.4294414904 +00 51 36.021249072   16.0 16.5     DAOZ.6 130 1
33 PN GJJC 1 PN 18 36 22.820 -23 55 18.26       13.52 12.44 ~ 97 0
34 CD-51 11879 HS* 19 02 11.7428660328 -51 30 09.561616380   11.44 11.55     sdO 41 0
35 MWP 1 PN 21 17 08.2817782392 +34 12 27.415995372     12.33     PG1159 186 0
36 V* IR Peg WD* 21 34 08.2124719240 +06 50 57.662044329   16.15       PG1159 118 0
37 PN A66 78 PN 21 35 29.3816259120 +31 41 45.449196108   13.04 13.25     [WC5] 326 0
38 NGC 7094 PN 21 36 52.9687364088 +12 47 19.099274136     13.650 13.775   sdB/sdO 194 0
39 HS 2209+8229 WD? 22 08 25.8763154304 +82 44 51.409027968   16.0       DO/sdO 14 0
40 V* V409 And WD* 23 27 15.9353097240 +40 01 23.429781408   14.1 15.41     DO 79 0
41 PN Jn 1 PN 23 35 53.3214838680 +30 28 06.336745212   15.52 15.62     DOZ 107 0

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