2006A&A...454..617H


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.15CEST07:07:02

2006A&A...454..617H - Astronomy and Astrophysics, volume 454, 617-624 (2006/8-1)

Spectral analyses of eighteen hot H-deficient (pre-) white dwarfs from the Sloan Digital Sky Survey Data Release 4.

HUEGELMEYER S.D., DREIZLER S., HOMEIER D., KRZESINSKI J., WERNER K., NITTA A. and KLEINMAN S.J.

Abstract (from CDS):

The Sloan Digital Sky Survey Data Release 4 has provided spectra of several new PG 1159 stars and DO white dwarfs. This increase in known hot H-deficient compact objects significantly improves the statistics and helps to investigate late stages of stellar evolution. From the optical SDSS spectra, effective temperatures and surface gravities are derived in order to place the observed objects in an evolutionary context. Especially the connection between PG 1159 stars and DO white dwarfs shall be investigated. Using our non-LTE model atmospheres and applying χ2-fitting techniques, we determine stellar parameters and their errors. We derive total stellar masses for the DO white dwarfs using model evolutionary tracks. We confirm three PG 1159 stars, with one showing ultra-high excitation ion features, and one sdO which we originally classified as a PG 1159 star. Additionally, we re-analysed the known PG 1159 star, PG 1424+535, with our new models. Furthermore, we present the first spectral analyses of thirteen DO white dwarfs, three of which show M-star features in their spectra, while two display ultra-high excitation ion features.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: fundamental parameters - stars: evolution - stars: AGB and post-AGB - stars: white dwarfs - stars: binaries: spectroscopic

Simbad objects: 47

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Number of rows : 47

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 PB 5835 WD* 00 16 51.4149669345 -01 13 29.300573363   16 16.80 17.41   PG1159 14 0
2 SDSS J003343.06+142251.5 WD* 00 33 43.0561111486 +14 22 51.476614206           DBAO 10 0
3 PG 0046+078 WD* 00 48 37.8850307259 +08 02 44.856934062   15.59 15.590     DO 18 0
4 HS 0111+0012 WD* 01 13 46.7763906618 +00 28 28.645434313   14.59 14.9     DO 31 0
5 SDSS J015629.58+131744.7 WD* 01 56 29.5819068014 +13 17 44.790651042   18.5 18.25 18.6   DB2 12 0
6 PG 0237+116 WD* 02 40 06.6412114996 +11 48 28.136992737   15.12       DO 20 0
7 LB 2828 WD* 02 54 03.7518805563 +00 58 54.223053309   17.5 17.39     DO 21 0
8 SDSS J034101.39+005353.0 WD* 03 41 01.3952264176 +00 53 52.924200423   17.38 18.03     DO 12 0
9 SDSS J034227.62-072213.2 WD* 03 42 27.6241853874 -07 22 13.265617170   17.20 17.88     DO 16 0
10 KUV 03467-0108 WD* 03 49 17.4090395531 -00 59 19.230131734   18.0 17.81     PG1159 14 1
11 SDSS J074538.17+312205.3 WD* 07 45 38.1758897988 +31 22 05.390552506   18.48 19.11     DO 8 0
12 KUV 07523+4017 WD* 07 55 40.9404091419 +40 09 17.908303755   17.00 17.53     PG1159 14 0
13 SDSS J075606.36+421613.0 WD* 07 56 06.3622851804 +42 16 13.096816274   18.61 19.20     DO+dM: 13 0
14 SDSS J081115.08+270621.7 WD* 08 11 15.0854756756 +27 06 21.824143555   17.65 18.38     DO 8 0
15 SDSS J081533.08+264646.4 WD* 08 15 33.0850199679 +26 46 46.433779038   19.02 19.72     DO: 5 0
16 SDSS J081546.08+244603.2 WD* 08 15 46.0840669752 +24 46 03.251015044   18.17 18.82     DO 7 0
17 SDSS J083504.76+090111.7 WD* 08 35 04.7631093019 +09 01 11.690059745           DAO 6 0
18 SDSS J084008.72+325114.5 WD* 08 40 08.7198496566 +32 51 14.604938716   18.20 18.93     DO 9 0
19 SDSS J084223.13+375900.1 WD* 08 42 23.1508310274 +37 59 00.141138568   17.07 17.83     DO 7 0
20 SBSS 0910+584 WD* 09 14 33.5975921268 +58 12 38.117220804   17.15 17.79     DO 17 0
21 SDSS J091621.83+052119.1 ** 09 16 21.820 +05 21 19.00   16.24 16.94     DO+M 12 0
22 SDSS J093546.53+110529.0 WD* 09 35 46.5389709181 +11 05 28.901994490           PG1159 9 0
23 SBSS 1020+541 WD* 10 23 27.4217697326 +53 52 58.717971857   17.5 17.91     PG1159 14 0
24 SDSS J110215.45+024034.2 HS* 11 02 15.4577238303 +02 40 34.332656828   16.78 17.48     sdO 9 0
25 PG 1133+489 WD* 11 36 09.5967599409 +48 43 18.926355773   16.20 14.22     DB+dM 34 0
26 SDSS J113631.49+591229.6 WD* 11 36 31.5016715088 +59 12 29.657656998   17.59 18.34     DAO 8 0
27 SDSS J115218.69-024915.8 WD* 11 52 18.6962668183 -02 49 15.862248985   17.35 18.03     DAB 6 0
28 V* GW Vir WD* 12 01 45.9728868858 -03 45 40.627851273   14.87 15.04     DOQZ1 462 0
29 SDSS J121523.08+120300.7 WD* 12 15 23.0852127541 +12 03 00.798513429   17.37 18.19     PG1159 8 0
30 SDSS J130249.00-013309.5 WD* 13 02 49.0047339404 -01 33 09.500725558   18.27 18.94     DB 8 0
31 PG 1314+003 WD* 13 17 24.7479077595 +00 02 37.376582009   15.97       DO 26 1
32 SDSS J133633.21-013116.5 WD* 13 36 33.2266555872 -01 31 16.691701347   17.25 17.46     DO+M 9 0
33 FBS 1342+673 WD* 13 43 41.8838174085 +67 01 54.512616365   16.37 17.15     PG1159 16 0
34 SDSS J140409.96+045739.9 WD* 14 04 09.9531203499 +04 57 40.012817019   16.96 17.71     DO 12 0
35 SBSS 1404+566 WD* 14 06 15.8234609302 +56 27 25.868428739   18.5 18.47     DBH: 10 0
36 PG 1424+535 WD* 14 25 55.4619829653 +53 15 25.137354831   15.86       PG1159 67 0
37 SBSS 1446+575 WD* 14 47 34.1185711820 +57 20 53.107785592   17.28 18.05     PG1159 12 0
38 SDSS J150053.98+025143.2 WD* 15 00 53.9929587585 +02 51 43.179156438   19.03 19.69     DO: 5 0
39 FBS 1509+613 WD* 15 10 26.4746859856 +61 06 56.930800047   16.47 17.27     DO 16 0
40 SDSS J154752.33+423210.8 WD* 15 47 52.3355307226 +42 32 10.835720483   17.09 17.81     DO 9 0
41 SDSS J155356.81+483228.6 WD* 15 53 56.7995599403 +48 32 28.593662357           DO 11 0
42 HD 149499B WD* 16 38 31.199 -57 28 10.70   11.12 11.26     DOZ1 100 0
43 SDSS J204158.97+000325.4 WD* 20 41 58.9754625722 +00 03 25.373429274   18.35 19.06     DAO 9 0
44 SDSS J205930.25-052848.9 WD* 20 59 30.2543379679 -05 28 48.949565747   17.22 17.94     DO 9 0
45 SDSS J213932.48+112611.2 WD* 21 39 32.4890952270 +11 26 11.310119880   18.89 19.50     DO: 5 0
46 SDSS J214223.31+111740.3 WD* 21 42 23.3163719148 +11 17 40.363238317   17.23 17.90     DO 7 0
47 PG 2333-002 HS* 23 35 41.4717647664 +00 02 19.522538544   15.99 16.0     sdOHe 21 0

    Equat.    Gal    SGal    Ecl

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2020.07.15-07:07:02

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