CDS

2006A&A...453.1051K

Query : 2006A&A...453.1051K

2006A&A...453.1051K - Astronomy and Astrophysics, volume 453, 1051-1057 (2006/7-3)

The accretion-diffusion scenario for metals in cool white dwarfs.

KOESTER D. and WILKEN D.

Abstract (from CDS):

We calculated diffusion timescales for Ca, Mg, Fe in hydrogen atmosphere white dwarfs with temperatures between 5000 and 25000K. With these timescales we determined accretion rates for a sample of 38 DAZ white dwarfs from the recent studies of Zuckerman et al. (2003ApJ...596..477Z) and Koester et al. (2005A&A...432.1025K). Assuming that the accretion rates can be calculated with the Bondi-Hoyle formula for hydrodynamic accretion, we obtained estimates for the interstellar matter density around the accreting objects. These densities are in good agreement with new data about the warm, partially ionized phase of the ISM in the solar neighborhood.

Abstract Copyright: ∼

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

CDS comments: Tables 1,3 : WD 0208+296 is a probable misprint for WD 0208+396.

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 - 2023 		#notes
1 EGGR 511 WD* 00 35 17.5123470013 -17 18 51.571586248   15.17 14.9 14.7   DA5.1 46 1
2 HS 0047+1903 WD* 00 50 12.4545315432 +19 19 48.512540388   15.94 15.59 16.0   DAZ 15 0
3 Ton S 193 WD* 01 08 36.0345990648 -32 37 43.377234996   15.34 15.26 15.86   DAZ 29 0
4 EGGR 168 WD* 02 11 20.8420869594 +39 55 21.516404474   14.80 14.50 14.4   DAZ6.9 107 0
5 PG 0235+064 WD* 02 38 30.9280475928 +06 37 59.842540308   15.53 15.09     DA3.5 32 0
6 EGGR 565 WD* 02 46 30.8013110459 -02 27 23.461070842   16.34 15.38   15.09 DA7.4 63 0
7 EGGR 473 WD* 02 48 36.4291217434 +54 23 22.464606271   16.25   15.1   DAZ9 62 0
8 HS 0307+0746 WD* 03 10 09.1588178784 +07 57 32.073855264   17.1   16.6   DAZ 22 0
9 GD 56 WD* 04 11 02.1686667960 -03 58 22.586865708   15.64 15.50 15.1   DA3.3 74 0
10 NAME LIC Cld 04 41 +31.           ~ 279 0
11 GD 290 WD* 05 47 56.3423408688 +57 59 22.479576360   16.0       DA5.1 35 0
12 Ton 953 WD* 08 49 09.4771157184 +34 29 47.732590248   15.99 15.72     DA6.6 54 0
13 PG 1015+161 WD* 10 18 03.8273436048 +15 51 58.566029940   15.70   15.2   DA2.5 69 0
14 EC 11023-1821 WD* 11 04 46.8827885760 -18 37 13.123596036   16.25 15.99 15.6   DA6.1 27 0
15 GD 133 WD* 11 19 12.3988618680 +02 20 33.045927216   14.76 14.57 14.8   DA4.0 83 0
16 Ruiz 439-80 WD* 11 27 09.2523446398 -29 40 11.199558503   15.02 15.02 14.8   DA5.3 43 1
17 EC 11507-1519 WD* 11 53 15.2581290960 -15 36 36.506488428   16.16 16.00 15.9   DA4.0 47 0
18 LP 852-7 WD* 12 05 26.6739103248 -23 33 12.139045488   13.04 12.90 12.66 12.52 DA5.7 49 0
19 LP 734-74 WD* 12 06 56.2914581818 -13 53 53.037650505   15.72 15.53 15.6   DA4.4 29 0
20 G 197-47 WD* 12 11 29.2732556757 +57 24 17.242313993   16.34   15.3   DA8.6 51 0
21 HE 1225+0038 WD* 12 28 07.7276728272 +00 22 19.623383832   15.2   15.1   DAZ 27 1
22 EGGR 94 WD* 12 59 46.6567450670 +27 34 04.137867253   15.68   15.0   DAZ5.9 66 0
23 HE 1315-1105 WD* 13 17 47.2436645472 -11 21 06.028259904   15.8   15.6   DAZ 22 0
24 LAWD 52 WD* 13 38 50.4780906644 +70 17 07.640657534 11.807 12.54 12.60 13.01 12.979 DA2.4 211 0
25 EGGR 360 WD* 13 47 24.3696354602 +10 21 38.013189353   15.49   14.8   DA7.1 92 0
26 PG 1407+425 WD* 14 09 45.2394571992 +42 16 00.654967560     14.98     DA5.0 38 0
27 EGGR 298 WD* 14 58 06.4884482642 +29 37 29.515263565   15.86   15.3   DA6.8 85 0
28 PG 1457-086 WD* 14 59 52.9901145672 -08 49 29.645894676   15.68 15.77 15.8   DA2.3 42 0
29 PG 1614+160 WD* 16 17 08.7453632376 +15 54 38.495476620   16.08   15.7   DA2.8 27 0
30 PG 1633+434 WD* 16 35 01.4291783063 +43 17 36.347179696   15.26   14.5   DAZ7.6 73 0
31 GD 362 WD* 17 31 34.3168718112 +37 05 20.711767812   16.3   16.4   DAZB 166 0
32 EGGR 176 WD* 18 24 04.5487353609 -13 08 42.294222804   16.02 15.60     DA7.8 27 0
33 EGGR 126 WD* 18 29 09.8621169216 -04 29 35.487640068   14.82 14.57 14.74   DA5.4 49 0
34 EGGR 580 WD* 19 00 17.2960061016 +39 22 35.250376008   16.7   15.6   DA5.3 31 0
35 LAWD 84 WD* 21 19 36.5325585235 -55 50 14.465412588 13.94 14.50 14.27 14.5   DA5.1 75 0
36 HS 2132+0941 WD* 21 34 50.8135124880 +09 55 20.259363108   15.7   15.4   DAZ 25 0
37 EGGR 150 WD* 21 52 25.3789636654 +02 23 19.576176425 11.942 12.732 12.743 12.839 12.938 DA2.8 184 0
38 PHL 5103 WD* 22 24 17.4348213312 -16 15 47.161639476   16.30 16.02 16.25 15.90 DAZ 28 0
39 HS 2229+2335 WD* 22 31 45.4681881984 +23 51 23.355178596   16.02 16.01 16.37   DAZ 21 0
40 V* ZZ Psc WD* 23 28 47.6365087803 +05 14 54.235051503   13.17   13.0   DA4.1 470 0
41 NAME Local Bubble ISM ~ ~           ~ 821 0

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2023.01.27-12:35:24

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