2006A&A...453.1051K


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.26CET18:07:38

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 - 2021
#notes
1 EGGR 511 WD* 00 35 17.5121261837 -17 18 51.573214772   15.17 14.9 14.7   DA5.1 42 1
2 HS 0047+1903 WD* 00 50 12.4544165064 +19 19 48.509321339   15.94 15.59 16.0   DAZ 12 0
3 Ton S 193 WD* 01 08 36.0346386218 -32 37 43.381351071   15.34 15.26 15.86   DAZ 25 0
4 EGGR 168 WD* 02 11 20.8420180006 +39 55 21.515685472   14.80 14.50 14.4   DAZ6.9 101 0
5 PG 0235+064 WD* 02 38 30.9279373499 +06 37 59.840264764   15.53 15.09     DA3.5 29 0
6 EGGR 565 WD* 02 46 30.8013439138 -02 27 23.459927248   16.34 15.38   15.09 DA7.4 58 0
7 EGGR 473 WD* 02 48 36.4289567406 +54 23 22.463731008   16.25   15.1   DAZ9 58 0
8 HS 0307+0746 WD* 03 10 09.1588235887 +07 57 32.076872124   17.1   16.6   DAZ 19 0
9 GD 56 WD* 04 11 02.1685298491 -03 58 22.586560976   15.64 15.50 15.1   DA3.3 69 0
10 NAME LIC Cld 04 41 +31.           ~ 253 0
11 GD 290 WD* 05 47 56.3425295091 +57 59 22.477457044   16.0       DA5.1 33 0
12 Ton 953 WD* 08 49 09.4772044410 +34 29 47.733686377   15.99 15.72     DA6.6 50 0
13 PG 1015+161 WD* 10 18 03.8271425956 +15 51 58.565078247   15.70   15.2   DA2.5 65 0
14 EC 11023-1821 WD* 11 04 46.8829242759 -18 37 13.124225088   16.25 15.99 15.6   DA6.1 24 0
15 GD 133 WD* 11 19 12.3989572558 +02 20 33.046829334   14.76 14.57 14.8   DA4.0 78 0
16 Ruiz 439-80 WD* 11 27 09.2524670230 -29 40 11.198530827   15.02 15.02 14.8   DA5.3 39 1
17 EC 11507-1519 WD* 11 53 15.2581059987 -15 36 36.505821827   16.16 16.00 15.9   DA4.0 45 0
18 LP 852-7 WD* 12 05 26.6739742867 -23 33 12.140186272   13.04 12.90 12.66 12.52 DA5.7 44 0
19 LP 734-74 WD* 12 06 56.2916485636 -13 53 53.042045072   15.72 15.53 15.6   DA4.4 27 0
20 G 197-47 WD* 12 11 29.2733579667 +57 24 17.243305492   16.34   15.3   DA8.6 48 0
21 HE 1225+0038 WD* 12 28 07.7274384270 +00 22 19.624696701   15.2   15.1   DAZ 23 1
22 EGGR 94 WD* 12 59 46.6566571330 +27 34 04.140165462   15.68   15.0   DAZ5.9 62 0
23 HE 1315-1105 WD* 13 17 47.2437026737 -11 21 06.029306163   15.8   15.6   DAZ 20 0
24 LAWD 52 WD* 13 38 50.4780798626 +70 17 07.641423392 11.807 12.54 12.60 13.01 12.979 DA2.4 200 0
25 EGGR 360 WD* 13 47 24.3695836668 +10 21 38.011535761   15.49   14.8   DA7.1 87 0
26 PG 1407+425 WD* 14 09 45.2394502852 +42 16 00.654922169     14.98     DA5.0 36 0
27 EGGR 298 WD* 14 58 06.4884281478 +29 37 29.515415393   15.86   15.3   DA6.8 82 0
28 PG 1457-086 WD* 14 59 52.9904888426 -08 49 29.647009899   15.68 15.77 15.8   DA2.3 41 0
29 PG 1614+160 WD* 16 17 08.7453505426 +15 54 38.497737294   16.08   15.7   DA2.8 24 0
30 PG 1633+434 WD* 16 35 01.4290922778 +43 17 36.346161096   15.26   14.5   DAZ7.6 69 0
31 GD 362 WD* 17 31 34.3169169136 +37 05 20.709668210   16.3   16.4   DAZB 153 0
32 EGGR 176 WD* 18 24 04.5487043531 -13 08 42.294195385   16.02 15.60     DA7.8 23 0
33 EGGR 126 WD* 18 29 09.8621857317 -04 29 35.487964512   14.82 14.57 14.74   DA5.4 46 0
34 EGGR 580 WD* 19 00 17.2959756628 +39 22 35.250835923   16.7   15.6   DA5.3 29 0
35 LAWD 84 WD* 21 19 36.5324188585 -55 50 14.465612769 13.94 14.50 14.27 14.5   DA5.1 70 0
36 HS 2132+0941 WD* 21 34 50.8136203554 +09 55 20.256984796   15.7   15.4   DAZ 21 0
37 EGGR 150 WD* 21 52 25.3788480672 +02 23 19.576520492 11.942 12.732 12.743 12.839 12.938 DA2.8 168 0
38 PHL 5103 WD* 22 24 17.4346134332 -16 15 47.163935881   16.30 16.02 16.25 15.90 DAZ 25 0
39 HS 2229+2335 WD* 22 31 45.4682773516 +23 51 23.360462985   16.02 16.01 16.37   DAZ 19 0
40 V* ZZ Psc WD* 23 28 47.6364608228 +05 14 54.234982405   13.17   13.0   DA4.1 446 0
41 NAME Local Bubble ISM ~ ~           ~ 718 0

    Equat.    Gal    SGal    Ecl

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2021.02.26-18:07:38

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