1998ApJ...505L.143Z

Query : 1998ApJ...505L.143Z

1998ApJ...505L.143Z - Astrophys. J., 505, L143-L146 (1998/October-1)

Metals in cool DA white dwarfs.

ZUCKERMAN B. and REID I.N.

Abstract (from CDS):

We used the HIRES echelle spectrograph on the Keck telescope to search for metals in the 3700-5200 Å spectra of white dwarfs with hydrogen-rich photospheres. The most popular models that account for the presence of metals are interstellar accretion and comet impact. The data are not easily reconciled with either model, but binarity might play a role. We comment on the implications for Oort-like comet clouds and certain types of planets around main-sequence stars.

Abstract Copyright: ∼

Journal keyword(s): Comets: General - ISM: Clouds - Stars: Abundances - Stars: White Dwarfs

Simbad objects: 38

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Number of rows : 38
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 EGGR 381 WD* 00 12 14.7449947981 +50 25 20.736275736   14.6   14.2   DA7.6 106 0
2 EGGR 7 WD* 01 03 49.9225512196 +05 04 30.568726390   14.295 13.972 14.030   DA5.9 102 0
3 Wolf 72 WD* 01 29 24.2592307066 +10 23 01.336915712   14.64   14.3   DA5.8 64 0
4 LAWD 10 WD* 01 37 59.3936818351 -04 59 44.668541360   13.20 12.83 12.8   DA+D1 191 0
5 EGGR 168 WD* 02 11 20.8420869594 +39 55 21.516404474   14.80 14.50 14.4   DAZ6.9 121 0
6 PG 0235+064 WD* 02 38 30.9280475928 +06 37 59.842540308   15.53 15.09     DA3.5 44 0
7 EGGR 473 WD* 02 48 36.4291217434 +54 23 22.464606271   16.25   15.1   DAZ9 73 0
8 EGGR 570 ** 03 58 17.1311170320 +46 28 39.741894840   15.868 15.663 15.578   DA+dM 36 0
9 V* RR Cae WD* 04 21 05.5631820426 -48 39 07.061113433 14.50 14.92 14.40     DA7.8 168 1
10 EGGR 524 WD* 05 14 03.5037732293 +08 00 15.126638361   16.30   15.7   DA7.6 46 0
11 GD 69 WD* 05 36 20.2147083168 +41 29 55.622008464   15.07 14.75     DA6.5 58 0
12 GD 290 WD* 05 47 56.3423408688 +57 59 22.479576360   16.0       DA5.1 42 0
13 EGGR 290 WD* 05 56 25.4599888487 +05 21 48.443176471   14.77 14.13 14.00   DA8P 163 0
14 L 886-6 WD* 07 01 54.8387102144 -06 27 46.230821653   16.2 15.42     DA7.6 50 0
15 CD-32 5613 WD* 08 41 32.4290850497 -32 56 32.915823461   12.07 11.85 12.3   DA5.5 325 0
16 Ton 953 WD* 08 49 09.4771157184 +34 29 47.732590248   15.99 15.72     DA6.6 71 0
17 EGGR 253 WD* 10 16 06.8734984055 -01 19 17.135621667   15.63 15.37     DA6.1 47 2
18 PG 1015+076 WD* 10 18 01.5340774848 +07 21 24.557191416           DA5 20 0
19 EGGR 350 WD* 10 23 09.0629848950 +63 27 41.489054140   15.09   14.6   DA7.3 70 0
20 G 45-45 WD* 11 16 40.3846890502 +06 27 02.665158959   17.20   16.9   DA7.8 34 0
21 Ross 627 WD* 11 24 12.9710801226 +21 21 35.569805995       14.28   DA6.8 124 0
22 G 197-47 WD* 12 11 29.2732556757 +57 24 17.242313993   16.34   15.3   DA8.6 66 0
23 Wolf 489 WD* 13 36 31.8521839520 +03 40 45.942173346   15.66   14.48   DC9 128 0
24 LAWD 52 WD* 13 38 50.4780906644 +70 17 07.640657534 11.807 12.54 12.60 13.01 12.979 DA2.4 234 0
25 EGGR 360 WD* 13 47 24.3696354602 +10 21 38.013189353   15.49   14.8   DA7.1 104 0
26 PG 1350-090 WD* 13 53 15.5345099352 -09 16 33.374583634   14.81 14.60     DAP5.3 52 1
27 G 124-26 WD* 14 20 54.8136738742 -09 05 08.768013261   15.9 15.36 15.21 15.01 DA6.1 41 0
28 GD 348 WD* 15 37 44.4366919464 +65 01 48.746398008   14.83   14.6   DA5.1 45 0
29 EGGR 116 WD* 16 08 22.1889820968 +42 05 43.435887864   13.91   13.7   DA3.8 54 0
30 PG 1633+434 WD* 16 35 01.4291783063 +43 17 36.347179696   15.26   14.5   DAZ7.6 85 0
31 Wolf 672 A WD* 17 18 35.1636500684 +01 56 53.203775107       14.63   DA3.7 93 0
32 EGGR 200 WD* 18 42 57.7479820102 -11 08 53.183098481       14.46 14.01 DA4.9 45 0
33 GD 215 WD* 18 43 25.7231549496 +04 20 22.832235600   15.06 14.92 14.2   DA5.6 55 0
34 GD 219 WD* 19 21 40.4179321464 +14 40 41.404467612   13.07 13.01 13.3   DA3.3 92 0
35 LAWD 79 WD* 19 56 29.2263375910 -01 02 32.671070269   13.89 13.56 13.73   DA6.4 158 0
36 EGGR 155 WD* 22 49 05.5507896558 +22 36 31.991540832   14.55   13.8   DA4.7 111 0
37 V* ZZ Psc WD* 23 28 47.6365087803 +05 14 54.235051503   13.217   13.106   DA4.1 536 0
38 LAWD 93 WD* 23 43 50.7212145360 +32 32 46.728318300   13.06 12.94 13.12   DA3.8 160 0

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