2005A&A...432.1025K

Query : 2005A&A...432.1025K

2005A&A...432.1025K - Astronomy and Astrophysics, volume 4321025-1032 (2005/3-4)

Metal traces in white dwarfs of the SPY (ESO SupernovaIa Progenitor Survey) sample.

KOESTER D., ROLLENHAGEN K., NAPIWOTZKI R., VOSS B., CHRISTLIEB N., HOMEIER D. and REIMERS D.

Abstract (from CDS):

We search for faint CaII lines in the spectra of about 800 apparently single white dwarfs observed at high resolution for the SPY (ESO Supernova Progenitor Survey) survey. Photospheric Ca is detected in 24 DAZ; in 25 mostly hot objects the observed lines must be interstellar. We also rediscover 9 strong H and K lines in helium-dominated atmospheres and discover for the first time faint lines in 8 DB. Most of these also show faint hydrogen lines and are thus classified DBAZ. The distribution of metal abundances is discussed and compared with the predictions of the accretion/diffusion scenario. We argue that the observations are easier to understand in a scenario of continuous ongoing accretion with rates varying with the conditions of the ambient medium, rather than with the strongly idealized ``two phase accretion/diffusion scenario'' of Dupuis et al. (1992ApJS...82..505D, 1993ApJS...84...73D, 1993ApJS...87..345D).

Abstract Copyright: ∼

Journal keyword(s): stars: white dwarfs - stars: atmospheres - stars: abundances

Simbad objects: 66

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Number of rows : 66
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 MCT 0027-6341 WD* 00 29 56.7251246112 -63 24 58.003740036   15.010 15.307 15.536   DA.8 51 0
2 Wolf 28 WD* 00 49 09.8983373329 +05 23 18.993828947 12.984 12.92 12.374 12.106 11.854 DZ7.5 266 0
3 HS 0047+1903 WD* 00 50 12.4545315432 +19 19 48.512540388   15.94 15.59 16.0   DAZ 23 0
4 Ton S 193 WD* 01 08 36.0345990648 -32 37 43.377234996   15.34 15.26 15.86   DAZ 41 0
5 JL 234 WD* 01 12 21.1414771296 -56 14 27.511008720   15.720 15.781     DBAZ 30 0
6 GD 1104 WD* 02 05 49.0453427640 -13 38 27.401175096   15.7       DA1.0 23 0
7 Feige 20 WD* 02 12 04.8543806520 +08 46 50.889500292   13.7 13.84 14.2   DA1.4 49 0
8 HE 0210-2012 WD* 02 13 01.8889972368 -19 58 34.364355456   16.0   16.4   DA 14 0
9 EGGR 565 WD* 02 46 30.8013110459 -02 27 23.461070842   16.34 15.38   15.09 DA7.4 72 0
10 GD 40 WD* 03 02 53.1037481136 -01 08 33.798683976   15.479 15.384     DBZ4 187 0
11 HS 0307+0746 WD* 03 10 09.1588178784 +07 57 32.073855264   17.1   16.6   DAZ 33 0
12 EGGR 566 WD* 03 25 11.0474878302 -01 49 15.047041848   16.8 16.22     DZA9 89 0
13 KUV 03290+0053 WD* 03 31 33.8935909488 +01 03 27.819941004   16.8 16.8 16.4   DA1.4 29 0
14 KUV 03301-0100 WD* 03 32 36.8682150864 -00 49 36.915251160   15.26 15.86 16.0   DA1.5 40 0
15 GD 56 WD* 04 11 02.1686667960 -03 58 22.586865708   15.64 15.50 15.1   DA3.3 92 0
16 HS 0424+0141 WD* 04 26 52.3911717168 +01 47 48.932335176   16.0   16.8   DA 12 0
17 RX J0443.1-0346 WD* 04 43 07.1639093832 -03 46 49.791898632   16.7 16.0 16.8   DA.8 41 0
18 HE 0449-2554 WD* 04 51 53.7470033760 -25 49 14.732939496 15.88 16.77 16.71     DBAZ 21 0
19 HS 0503+0154 WD* 05 05 39.2077455048 +01 58 29.085875868   15.1 15.3 15.7   DA 16 0
20 GD 257 WD* 05 50 37.5195849864 +00 05 52.623285612   14.80 15.10 15.1   DA1.1 72 0
21 PG 1015+161 WD* 10 18 03.8273436048 +15 51 58.566029940   15.596 15.607 16.000   DA2.5 92 0
22 GD 133 WD* 11 19 12.3988618680 +02 20 33.045927216   14.734 14.617 14.855   DA4.0 107 0
23 Ruiz 439-80 WD* 11 27 09.2523446398 -29 40 11.199558503   15.02 15.02 14.8   DA5.3 54 1
24 EC 11448-2438 WD* 11 47 20.1006364704 -24 54 56.937939552   15.5 15.71 15.6   DA1.6 17 0
25 EC 11507-1519 WD* 11 53 15.2581290960 -15 36 36.506488428   16.16 16.00 15.9   DA4.0 61 0
26 LP 852-7 WD* 12 05 26.6739103248 -23 33 12.139045488   13.04 12.90 12.66 12.52 DA5.7 73 0
27 LP 734-74 WD* 12 06 56.2914581818 -13 53 53.037650505   15.72 15.53 15.6   DA4.4 37 0
28 PG 1225-079 WD* 12 27 47.3585913504 -08 14 37.972720428   14.86 14.74 15.15   DZA4 85 0
29 HE 1225+0038 WD* 12 28 07.7276728272 +00 22 19.623383832   15.2   15.1   DAZ 37 1
30 EC 13123-2523 WD* 13 15 03.8720497416 -25 39 00.008037612   15.47 15.69     DA1 13 0
31 HE 1315-1105 WD* 13 17 47.2436645472 -11 21 06.028259904   15.8   15.6   DAZ 31 0
32 EC 13288-1515 WD* 13 31 34.8131240904 -15 30 47.356382484   15.14 15.49     DA.9 15 0
33 HE 1349-2305 WD* 13 52 44.1241675416 -23 20 05.386384320   17.9 16.3 16.6   DBAZ 43 0
34 PG 1352+004 WD* 13 55 32.4133419912 +00 11 23.939808900   15.72       DB4 39 0
35 PG 1457-086 WD* 14 59 52.9901145672 -08 49 29.645894676   15.68 15.77 15.8   DA2.3 51 0
36 PG 1614+160 WD* 16 17 08.7453632376 +15 54 38.495476620   16.08   15.7   DA2.8 37 0
37 EGGR 494 WD* 17 08 07.9651989788 +02 57 37.081283576   15.65   14.5   DZ7 72 0
38 GD 205 WD* 17 11 55.6598934984 +23 01 01.525512072   14.81   15.1   DBAZ 45 0
39 GD 370 WD* 17 57 38.9259031896 +19 24 17.603304948   15.89 15.99 15.73   DA2.0 26 0
40 EGGR 126 WD* 18 29 09.8621169216 -04 29 35.487640068   14.82 14.57 14.74   DA5.4 57 0
41 HS 2046+0044 WD* 20 48 38.2985586072 +00 56 00.939931836   16.7   16.4   DA 12 0
42 LAWD 83 WD* 21 13 16.8549349741 -81 49 12.878285501 13.28 13.82 13.59 13.6   DA4.8 125 0
43 LAWD 84 WD* 21 19 36.5325585235 -55 50 14.465412588 13.94 14.50 14.27 14.5   DA5.1 96 0
44 PG 2120+055 WD* 21 22 34.8825182184 +05 42 39.612925260   16.23 16.38 16.4   DA1.4 31 0
45 WD 2127-221 WD* 21 30 00.0629137992 -21 54 06.583226868       14.10   DA1 3 0
46 HS 2132+0941 WD* 21 34 50.8135124880 +09 55 20.259363108   15.7   15.4   DAZ 35 0
47 PHL 131 WD* 21 45 27.6844015368 -16 43 08.457500928 14.49 15.63 15.9     DO5 16 0
48 LAWD 89 WD* 21 47 37.2893176824 -07 44 12.210487188 13.752 14.77 14.83 14.96 14.889 DB0 71 0
49 BPS CS 22951-0067 WD* 21 49 38.9311843872 -43 06 14.181796188   15.8 15.7 15.7   DA.6 30 0
50 EGGR 150 WD* 21 52 25.3789636654 +02 23 19.576176425 11.942 12.732 12.743 12.839 12.938 DA2.8 213 0
51 PG 2150+021 WD* 21 53 30.1644961416 +02 23 12.358510872   16.12       DA1.2 19 0
52 LAWD 91 WD* 22 19 48.3089909755 -65 29 17.484537097 13.98 14.66 14.53     DZ5 61 0
53 PHL 5103 WD* 22 24 17.4348213312 -16 15 47.161639476   16.30 16.02 16.25 15.90 DAZ 39 0
54 EGGR 906 WD* 22 31 45.4248237936 +14 11 13.997992884   16.05 16.10 16.4   DB4 27 0
55 HS 2229+2335 WD* 22 31 45.4681881984 +23 51 23.355178596   16.02 16.01 16.37   DAZ 27 0
56 GD 237 WD* 22 33 38.7258237144 -12 15 28.462736988   16.0 16.3 18.1   DAZ 25 0
57 Feige 106 WD* 22 42 44.6217439560 -04 14 15.200046492   15.1 15.23 15.3   DA1.1 38 0
58 PG 2244+031 WD* 22 47 22.2458635560 +03 21 46.927863072   16.1   16.2   DA.8 20 0
59 PG 2303+017 WD* 23 06 13.0800538968 +01 58 52.419358884   15.76   16.2   DA1.2 20 0
60 PG 2308+051 WD* 23 11 17.9166730632 +05 19 28.719529932   15.66   16.2   DA1.4 21 0
61 EGGR 554 WD* 23 15 18.8072875951 -02 09 40.600262749   16.80 16.29     DZ8 55 0
62 PG 2322+119 WD* 23 24 57.9722645856 +12 07 39.359447184   16.25   16.2   DZA4 35 0
63 V* ZZ Psc WD* 23 28 47.6365087803 +05 14 54.235051503   13.217   13.106   DA4.1 536 0
64 PG 2353+027 WD* 23 56 27.6927573888 +02 57 05.600554632   15.83 15.830 16.1   DA.8 30 0
65 PG 2354+159 WD* 23 56 34.7462697000 +16 15 40.257339876   15.78   16.15   DBZ 30 0
66 GD 1273 WD* 23 57 33.4235985720 -14 54 09.291653028   15.1 15.3     DA1.4 22 0

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